Subject: Re: [Shop-talk] Plastic epoxy/solvent weld

From: Ian McFetridge <[email-masked]>
Date: Sun, 5 Oct 2025 20:40:16 -0400

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You're probably right that they were solvent welded, that's fairly common
with acrylic pieces (what I see my wife's clips appear to be).  Maybe buy a
couple test clips that appear to be there same material for testing as
solvent welding can deform really if not done in just there right way.

Here's there AI scoop on welding the two plastics I see clips are mostly
made from:
Both cellulose acetate and acrylic can be solvent welded
, but they require different solvents to fuse the plastic together. The
solvent essentially melts the surfaces of the plastic pieces, which then
bond to form a seamless, single piece as the solvent evaporates.
Solvent welding cellulose acetate

   - *Solvents:* The most common and accessible solvent for welding
   cellulose acetate is pure acetone. Nail polish remover is not recommende=
d
   as it contains emollients and other additives that interfere with the
   welding process.
   - *Method:* A thin coat of acetone is applied to the clean surfaces of
   the cellulose acetate. The pieces are then pressed together and held fir=
mly
   while the solvent evaporates.
   - *Considerations:* The process for welding cellulose acetate can be
   slow and requires significant pressure for a successful bond.
   - *Best for:* Eyeglass frames, tool handles, and film materials.

Solvent welding acrylic

   - *Solvents:* Acrylic solvent cements, such as Weld-On #3 and #4, are
   specifically designed for bonding acrylic. These cements are typically a
   fast-drying, water-thin liquid based on chemicals like methylene chlorid=
e.
   - *Method:* The process relies on capillary action. With the pieces held
   together, a small amount of the liquid cement is applied along the seam.
   The solvent is drawn into the joint, melting the two surfaces together.
   - *Considerations:* It is crucial to have perfectly flat, smooth, and
   clean edges, as the watery solvent will not fill gaps. Clamping or tapin=
g
   the pieces together beforehand is recommended for precision.
   - *Best for:* Projects requiring a strong, clear, and seamless joint,
   such as display cases, signs, and aquariums.

Key differences between the two
Feature  Cellulose Acetate Acrylic
*Common Solvent* Pure Acetone Specialized acrylic cements (e.g., Weld-On #3=
)
*Bond Speed* Slow, requiring hours and pressure to cure Very fast, with an
initial set in minutes and a full cure in 24=E2=80=9348 hours
*Bond Clarity* Can be clear, but is prone to blemishes if not done
carefully. Excellent, capable of producing very clear, seamless, and
bubble-free joints.
*Application* Acetone can be brushed or sprayed on, but careful application
is needed to avoid damaging the finish. Typically applied with a
needle-nosed applicator to let capillary action draw the cement into the
joint.

If you just want to try glue....From my experience I would rule out super
glue (cyanoacrylate) as it is better for static adhesion, like a figurine,
not loads.  Polyurethane glues like Gorilla glue are tougher (absorb stress
by flexing a little more).  I'd definitely rough up the surfaces and
ideally if you could drill holes for small pins to couple them like dowels,
you'd get the strongest combination with mechanical and chemical bonding.

Best
Ian

On Sun, Oct 5, 2025 at 6:43=E2=80=AFPM Jim Stone <[email-masked]> wro=
te:

> My granddaughter asked me to fix her favorite hair clip and I=E2=80=99d l=
ike to
> keep my reputation as Grandpa Fixit intact.  The part that came off will =
be
> under stress when the clip is used.  The plastic didn=E2=80=99t break; th=
e larger,
> decorative part of the clip came loose from the spring clip.  It looks to
> me like it was originally solvent welded, not glued.
>
>
>
> I have never had tremendous luck gluing plastic but never tried solvent
> welding. Does anyone here have a recommendations for either a strong enou=
gh
> plastic glue or a readily available solvent that I could use to bond the
> two pieces and keep my reputation intact?
>
> Thanks,
>
> PaG, aka Jim_______________________________________________
>
> [email-masked]
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.96
> Archive: http://www.team.net/pipermail/shop-talk
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>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/shop-talk/[email-masked]
>
>

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<div dir=3D"auto">You&#39;re probably right that they were solvent welded, =
that&#39;s fairly common with acrylic pieces (what I see my wife&#39;s clip=
s appear to be).=C2=A0 Maybe buy a couple test clips that appear to be ther=
e same material for testing as solvent welding can deform really if not don=
e in just there right way. =C2=A0</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Here&#39;s there AI scoop on welding the two plastics I see clips=
 are mostly made from:</div><div dir=3D"auto"><div><div style=3D"font-famil=
y:&quot;google sans&quot;,roboto,arial,sans-serif;font-size:16px;margin:0px=
 0px 20px;font-weight:400;font-style:normal;letter-spacing:normal;text-inde=
nt:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decorat=
ion:none;color:rgb(238,240,255)"><div style=3D"font-family:&quot;google san=
s&quot;,roboto,arial,sans-serif" dir=3D"auto">Both cellulose acetate and ac=
rylic can be solvent welded</div>, but they require different solvents to f=
use the plastic together. The solvent essentially melts the surfaces of the=
 plastic pieces, which then bond to form a seamless, single piece as the so=
lvent evaporates.<span style=3D"white-space:nowrap;font-family:&quot;google=
 sans&quot;,roboto,arial,sans-serif">=C2=A0<button style=3D"margin:0px 6px =
0px 0px;border:medium;border-radius:10px;height:20px;padding:0px;width:28px=
;outline:0px"><span style=3D"display:inline-block"></span></button></span><=
/div><div style=3D"font-family:&quot;google sans&quot;,roboto,arial,sans-se=
rif;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;=
text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;tex=
t-decoration:none;color:rgb(238,240,255)"></div><div style=3D"margin:20px 0=
px 10px;font-family:&quot;google sans&quot;,roboto,arial,sans-serif;font-we=
ight:500;font-style:normal;letter-spacing:normal;text-indent:0px;text-trans=
form:none;white-space:normal;word-spacing:0px;text-decoration:none;color:rg=
b(238,240,255)">Solvent welding cellulose acetate<span style=3D"white-space=
:nowrap;font-family:&quot;google sans&quot;,roboto,arial,sans-serif"><butto=
n style=3D"margin:0px 6px 0px 0px;border:medium;border-radius:10px;height:2=
0px;padding:0px;width:28px;outline:0px"><span style=3D"display:inline-block=
"></span></button></span></div><ul style=3D"margin:10px 0px 20px;padding:0p=
x;font-family:&quot;google sans&quot;,roboto,arial,sans-serif;font-size:16p=
x;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;t=
ext-transform:none;white-space:normal;word-spacing:0px;text-decoration:none=
;color:rgb(238,240,255)"><li style=3D"margin:0px 0px 16px;padding:0px;list-=
style:outside;font-family:&quot;google sans&quot;,roboto,arial,sans-serif">=
<strong style=3D"font-weight:bolder;font-family:&quot;google sans&quot;,rob=
oto,arial,sans-serif">Solvents:</strong>=C2=A0The most common and accessibl=
e solvent for welding cellulose acetate is pure acetone. Nail polish remove=
r is not recommended as it contains emollients and other additives that int=
erfere with the welding process.</li><li style=3D"margin:0px 0px 16px;paddi=
ng:0px;list-style:outside;font-family:&quot;google sans&quot;,roboto,arial,=
sans-serif"><strong style=3D"font-weight:bolder;font-family:&quot;google sa=
ns&quot;,roboto,arial,sans-serif">Method:</strong>=C2=A0A thin coat of acet=
one is applied to the clean surfaces of the cellulose acetate. The pieces a=
re then pressed together and held firmly while the solvent evaporates.</li>=
<li style=3D"margin:0px 0px 16px;padding:0px;list-style:outside;font-family=
:&quot;google sans&quot;,roboto,arial,sans-serif"><strong style=3D"font-wei=
ght:bolder;font-family:&quot;google sans&quot;,roboto,arial,sans-serif">Con=
siderations:</strong>=C2=A0The process for welding cellulose acetate can be=
 slow and requires significant pressure for a successful bond.</li><li styl=
e=3D"margin:0px 0px 16px;padding:0px;list-style:outside;font-family:&quot;g=
oogle sans&quot;,roboto,arial,sans-serif"><strong style=3D"font-weight:bold=
er;font-family:&quot;google sans&quot;,roboto,arial,sans-serif">Best for:</=
strong>=C2=A0Eyeglass frames, tool handles, and film materials.<span style=
=3D"white-space:nowrap;font-family:&quot;google sans&quot;,roboto,arial,san=
s-serif">=C2=A0<button style=3D"margin:0px 6px 0px 0px;border:medium;border=
-radius:10px;height:20px;padding:0px;width:28px;outline:0px"><span style=3D=
"display:inline-block"></span></button></span></li></ul><div style=3D"font-=
family:&quot;google sans&quot;,roboto,arial,sans-serif;font-size:16px;font-=
style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-tra=
nsform:none;white-space:normal;word-spacing:0px;text-decoration:none;color:=
rgb(238,240,255)"></div><div style=3D"margin:20px 0px 10px;font-family:&quo=
t;google sans&quot;,roboto,arial,sans-serif;font-weight:500;font-style:norm=
al;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:no=
rmal;word-spacing:0px;text-decoration:none;color:rgb(238,240,255)">Solvent =
welding acrylic<span style=3D"white-space:nowrap;font-family:&quot;google s=
ans&quot;,roboto,arial,sans-serif"><button style=3D"margin:0px 6px 0px 0px;=
border:medium;border-radius:10px;height:20px;padding:0px;width:28px;outline=
:0px"><span style=3D"display:inline-block"></span></button></span></div><ul=
 style=3D"margin:10px 0px 20px;padding:0px;font-family:&quot;google sans&qu=
ot;,roboto,arial,sans-serif;font-size:16px;font-style:normal;font-weight:40=
0;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:nor=
mal;word-spacing:0px;text-decoration:none;color:rgb(238,240,255)"><li style=
=3D"margin:0px 0px 16px;padding:0px;list-style:outside;font-family:&quot;go=
ogle sans&quot;,roboto,arial,sans-serif"><strong style=3D"font-weight:bolde=
r;font-family:&quot;google sans&quot;,roboto,arial,sans-serif">Solvents:</s=
trong>=C2=A0Acrylic solvent cements, such as Weld-On #3 and #4, are specifi=
cally designed for bonding acrylic. These cements are typically a fast-dryi=
ng, water-thin liquid based on chemicals like methylene chloride.</li><li s=
tyle=3D"margin:0px 0px 16px;padding:0px;list-style:outside;font-family:&quo=
t;google sans&quot;,roboto,arial,sans-serif"><strong style=3D"font-weight:b=
older;font-family:&quot;google sans&quot;,roboto,arial,sans-serif">Method:<=
/strong>=C2=A0The process relies on capillary action. With the pieces held =
together, a small amount of the liquid cement is applied along the seam. Th=
e solvent is drawn into the joint, melting the two surfaces together.</li><=
li style=3D"margin:0px 0px 16px;padding:0px;list-style:outside;font-family:=
&quot;google sans&quot;,roboto,arial,sans-serif"><strong style=3D"font-weig=
ht:bolder;font-family:&quot;google sans&quot;,roboto,arial,sans-serif">Cons=
iderations:</strong>=C2=A0It is crucial to have perfectly flat, smooth, and=
 clean edges, as the watery solvent will not fill gaps. Clamping or taping =
the pieces together beforehand is recommended for precision.</li><li style=
=3D"margin:0px 0px 16px;padding:0px;list-style:outside;font-family:&quot;go=
ogle sans&quot;,roboto,arial,sans-serif"><strong style=3D"font-weight:bolde=
r;font-family:&quot;google sans&quot;,roboto,arial,sans-serif">Best for:</s=
trong>=C2=A0Projects requiring a strong, clear, and seamless joint, such as=
 display cases, signs, and aquariums.<span style=3D"white-space:nowrap;font=
-family:&quot;google sans&quot;,roboto,arial,sans-serif">=C2=A0<button styl=
e=3D"margin:0px 6px 0px 0px;border:medium;border-radius:10px;height:20px;pa=
dding:0px;width:28px;outline:0px"><span style=3D"display:inline-block"></sp=
an></button></span></li></ul><div style=3D"font-family:&quot;google sans&qu=
ot;,roboto,arial,sans-serif;font-size:16px;font-style:normal;font-weight:40=
0;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:nor=
mal;word-spacing:0px;text-decoration:none;color:rgb(238,240,255)"></div><di=
v style=3D"margin:20px 0px 10px;font-family:&quot;google sans&quot;,roboto,=
arial,sans-serif;font-weight:500;font-style:normal;letter-spacing:normal;te=
xt-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-=
decoration:none;color:rgb(238,240,255)">Key differences between the two<spa=
n style=3D"white-space:nowrap;font-family:&quot;google sans&quot;,roboto,ar=
ial,sans-serif"><button style=3D"margin:0px 6px 0px 0px;border:medium;borde=
r-radius:10px;height:20px;padding:0px;width:28px;outline:0px"><span style=
=3D"display:inline-block"></span></button></span></div><div style=3D"font-f=
amily:&quot;google sans&quot;,roboto,arial,sans-serif;font-size:16px;font-s=
tyle:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-tran=
sform:none;white-space:normal;word-spacing:0px;text-decoration:none;color:r=
gb(238,240,255)"></div><div style=3D"margin:16px 20px;font-family:&quot;goo=
gle sans&quot;,roboto,arial,sans-serif;font-size:16px;font-style:normal;fon=
t-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;whit=
e-space:normal;word-spacing:0px;text-decoration:none;color:rgb(238,240,255)=
"><table style=3D"border:medium;border-collapse:collapse;table-layout:auto;=
width:696px;font-family:&quot;google sans&quot;,roboto,arial,sans-serif"><t=
body style=3D"font-family:&quot;google sans&quot;,roboto,arial,sans-serif">=
<tr style=3D"font-family:&quot;google sans&quot;,roboto,arial,sans-serif"><=
th colspan=3D"undefined" style=3D"border-bottom-width:1px;border-bottom-sty=
le:solid;min-width:4em;vertical-align:top;font-weight:bold;padding:0px 10px=
 12px 0px;text-align:left;font-size:14px;background:repeat;font-family:&quo=
t;google sans&quot;,roboto,arial,sans-serif;border-bottom-color:currentcolo=
r">Feature<span style=3D"white-space:nowrap;font-family:&quot;google sans&q=
uot;,roboto,arial,sans-serif">=C2=A0<button style=3D"margin:0px 6px 0px 0px=
;border:medium;border-radius:10px;height:20px;padding:0px;width:28px;outlin=
e:0px"><span style=3D"display:inline-block"></span></button></span></th><th=
 colspan=3D"undefined" style=3D"border-bottom-width:1px;border-bottom-style=
:solid;min-width:4em;vertical-align:top;font-weight:bold;padding:0px 10px 1=
2px 16px;text-align:left;font-size:14px;font-family:&quot;google sans&quot;=
,roboto,arial,sans-serif;border-bottom-color:currentcolor">Cellulose Acetat=
e</th><th colspan=3D"undefined" style=3D"border-bottom-width:1px;border-bot=
tom-style:solid;min-width:4em;vertical-align:top;font-weight:bold;padding:0=
px 0px 12px 10px;text-align:left;font-size:14px;font-family:&quot;google sa=
ns&quot;,roboto,arial,sans-serif;border-bottom-color:currentcolor">Acrylic<=
/th></tr><tr style=3D"font-family:&quot;google sans&quot;,roboto,arial,sans=
-serif"><td colspan=3D"undefined" style=3D"border-bottom-width:1px;border-b=
ottom-style:solid;min-width:4em;vertical-align:top;font-family:&quot;google=
 sans&quot;,arial,sans-serif;font-size:14px;line-height:18px;padding:12px 1=
0px 12px 0px;font-weight:400;background:repeat;border-bottom-color:currentc=
olor"><strong style=3D"font-weight:bolder;font-family:&quot;google sans&quo=
t;,arial,sans-serif">Common Solvent</strong></td><td colspan=3D"undefined" =
style=3D"border-bottom-width:1px;border-bottom-style:solid;min-width:4em;ve=
rtical-align:top;font-family:&quot;google sans&quot;,arial,sans-serif;font-=
size:14px;line-height:18px;padding:12px 10px;font-weight:400;border-bottom-=
color:currentcolor">Pure Acetone</td><td colspan=3D"undefined" style=3D"bor=
der-bottom-width:1px;border-bottom-style:solid;min-width:4em;vertical-align=
:top;font-family:&quot;google sans&quot;,arial,sans-serif;font-size:14px;li=
ne-height:18px;padding:12px 0px 12px 10px;font-weight:400;border-bottom-col=
or:currentcolor">Specialized acrylic cements (e.g., Weld-On #3)</td></tr><t=
r style=3D"font-family:&quot;google sans&quot;,roboto,arial,sans-serif"><td=
 colspan=3D"undefined" style=3D"border-bottom-width:1px;border-bottom-style=
:solid;min-width:4em;vertical-align:top;font-family:&quot;google sans&quot;=
,arial,sans-serif;font-size:14px;line-height:18px;padding:12px 10px 12px 0p=
x;font-weight:400;background:repeat;border-bottom-color:currentcolor"><stro=
ng style=3D"font-weight:bolder;font-family:&quot;google sans&quot;,arial,sa=
ns-serif">Bond Speed</strong></td><td colspan=3D"undefined" style=3D"border=
-bottom-width:1px;border-bottom-style:solid;min-width:4em;vertical-align:to=
p;font-family:&quot;google sans&quot;,arial,sans-serif;font-size:14px;line-=
height:18px;padding:12px 10px;font-weight:400;border-bottom-color:currentco=
lor">Slow, requiring hours and pressure to cure</td><td colspan=3D"undefine=
d" style=3D"border-bottom-width:1px;border-bottom-style:solid;min-width:4em=
;vertical-align:top;font-family:&quot;google sans&quot;,arial,sans-serif;fo=
nt-size:14px;line-height:18px;padding:12px 0px 12px 10px;font-weight:400;bo=
rder-bottom-color:currentcolor">Very fast, with an initial set in minutes a=
nd a full cure in 24=E2=80=9348 hours</td></tr><tr style=3D"font-family:&qu=
ot;google sans&quot;,roboto,arial,sans-serif"><td colspan=3D"undefined" sty=
le=3D"border-bottom-width:1px;border-bottom-style:solid;min-width:4em;verti=
cal-align:top;font-family:&quot;google sans&quot;,arial,sans-serif;font-siz=
e:14px;line-height:18px;padding:12px 10px 12px 0px;font-weight:400;backgrou=
nd:repeat;border-bottom-color:currentcolor"><strong style=3D"font-weight:bo=
lder;font-family:&quot;google sans&quot;,arial,sans-serif">Bond Clarity</st=
rong></td><td colspan=3D"undefined" style=3D"border-bottom-width:1px;border=
-bottom-style:solid;min-width:4em;vertical-align:top;font-family:&quot;goog=
le sans&quot;,arial,sans-serif;font-size:14px;line-height:18px;padding:12px=
 10px;font-weight:400;border-bottom-color:currentcolor">Can be clear, but i=
s prone to blemishes if not done carefully.</td><td colspan=3D"undefined" s=
tyle=3D"border-bottom-width:1px;border-bottom-style:solid;min-width:4em;ver=
tical-align:top;font-family:&quot;google sans&quot;,arial,sans-serif;font-s=
ize:14px;line-height:18px;padding:12px 0px 12px 10px;font-weight:400;border=
-bottom-color:currentcolor">Excellent, capable of producing very clear, sea=
mless, and bubble-free joints.</td></tr><tr style=3D"font-family:&quot;goog=
le sans&quot;,roboto,arial,sans-serif"><td colspan=3D"undefined" style=3D"b=
order-bottom-width:1px;border-bottom-style:solid;min-width:4em;vertical-ali=
gn:top;font-family:&quot;google sans&quot;,arial,sans-serif;font-size:14px;=
line-height:18px;padding:12px 10px 12px 0px;font-weight:400;background:repe=
at;border-bottom-color:currentcolor"><strong style=3D"font-weight:bolder;fo=
nt-family:&quot;google sans&quot;,arial,sans-serif">Application</strong></t=
d><td colspan=3D"undefined" style=3D"border-bottom-width:1px;border-bottom-=
style:solid;min-width:4em;vertical-align:top;font-family:&quot;google sans&=
quot;,arial,sans-serif;font-size:14px;line-height:18px;padding:12px 10px;fo=
nt-weight:400;border-bottom-color:currentcolor">Acetone can be brushed or s=
prayed on, but careful application is needed to avoid damaging the finish.<=
/td><td colspan=3D"undefined" style=3D"border-bottom-width:1px;border-botto=
m-style:solid;min-width:4em;vertical-align:top;font-family:&quot;google san=
s&quot;,arial,sans-serif;font-size:14px;line-height:18px;padding:12px 0px 1=
2px 10px;font-weight:400;border-bottom-color:currentcolor">Typically applie=
d with a needle-nosed applicator to let capillary action draw the cement in=
to the joint.</td></tr></tbody></table></div></div><br></div><div dir=3D"au=
to"><br></div><div dir=3D"auto">If you just want to try glue....From my exp=
erience I would rule out super glue (cyanoacrylate) as it is better for sta=
tic adhesion, like a figurine, not loads.=C2=A0 Polyurethane glues like Gor=
illa glue are tougher (absorb stress by flexing a little more).=C2=A0 I&#39=
;d definitely rough up the surfaces and ideally if you could drill holes=C2=
=A0for small pins to couple them like dowels, you&#39;d get the strongest c=
ombination with mechanical and chemical bonding. =C2=A0</div><div dir=3D"au=
to"><br></div><div dir=3D"auto">Best</div><div dir=3D"auto">Ian</div><div d=
ir=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></d=
iv><div><br><div class=3D"gmail_quote gmail_quote_container"><div dir=3D"lt=
r" class=3D"gmail_attr">On Sun, Oct 5, 2025 at 6:43=E2=80=AFPM Jim Stone &l=
t;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrot=
e:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-=
left-color:rgb(204,204,204)">My granddaughter asked me to fix her favorite =
hair clip and I=E2=80=99d like to keep my reputation as Grandpa Fixit intac=
t.=C2=A0 The part that came off will be under stress when the clip is used.=
=C2=A0 The plastic didn=E2=80=99t break; the larger, decorative part of the=
 clip came loose from the spring clip.=C2=A0 It looks to me like it was ori=
ginally solvent welded, not glued.=C2=A0 <br>
<br>
<br>
<br>
I have never had tremendous luck gluing plastic but never tried solvent wel=
ding. Does anyone here have a recommendations for either a strong enough pl=
astic glue or a readily available solvent that I could use to bond the two =
pieces and keep my reputation intact?<br>
<br>
Thanks,<br>
<br>
PaG, aka Jim_______________________________________________<br>
<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">Shop-talk@aut=
ox.team.net</a><br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
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alk/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://=
autox.team.net/mailman/options/shop-talk/[email-masked]</a><br>
<br>
</blockquote></div></div>

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_______________________________________________

[email-masked]
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive

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From: dhlocker <[email-masked]>
Date: Mon, 06 Oct 2025 22:51:39 +0000

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---

From: Jim Stone <[email-masked]>
Date: Mon, 6 Oct 2025 20:43:11 -0400

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Thanks, guys.  I think it is acrylic, too and will give it a try.  I can =
always try glue if solvent doesn=E2=80=99t work, but it is unlikely to =
work the other way around.  Something new for my arsenal!

> On Oct 6, 2025, at 6:51=E2=80=AFPM, dhlocker <[email-masked]> =
wrote:
>=20
> [Apologies to Jim for the duplicate response; I forget that I have to =
Reply to List for autox posts. Resending to list so all can jump on and =
criticise my response.]
>=20
> The pieces are likely acrylic for which solvent welding is the cat's =
pyjamas (dog's nuts; some other animal's PPE) =
https://www.acmeplastics.com/content/a-guide-to-gluing-acrylic-plastic-to-=
plastic/ has good advice.
>=20
> I don't trust any artificial plagiarism answers, FWIW.
>=20
> Donald.
>=20
> On 10/5/25 10:52, Jim Stone wrote:
>> My granddaughter asked me to fix her favorite hair clip and I=E2=80=99d=
 like to keep my reputation as Grandpa Fixit intact. The part that came =
off will be under stress when the clip is used. The plastic didn=E2=80=99t=
 break; the larger, decorative part of the clip came loose from the =
spring clip. It looks to me like it was originally solvent welded, not =
glued.=20
>>=20
>>=20
>>=20
>>=20
>> I have never had tremendous luck gluing plastic but never tried =
solvent welding. Does anyone here have a recommendations for either a =
strong enough plastic glue or a readily available solvent that I could =
use to bond the two pieces and keep my reputation intact?
>>=20
>>=20
>> PaG, aka Jim
>>=20
>>=20
>> Archive: http://www.team.net/pipermail/shop-talk =
>>=20
>> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/shop-talk/[email-masked]
>>=20
>>=20
>=20
> Archive: http://www.team.net/pipermail/shop-talk =
>=20
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/shop-talk/[email-masked]
>=20

--Apple-Mail=_2BA0C49A-D1DD-426B-ACB1-276FD910E2AD
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">Thanks, guys. =
&nbsp;I think it is acrylic, too and will give it a try. &nbsp;I can =
always try glue if solvent doesn=E2=80=99t work, but it is unlikely to =
work the other way around. &nbsp;Something new for my arsenal!<br =
id=3D"lineBreakAtBeginningOfMessage"><div><br><blockquote =
type=3D"cite"><div>On Oct 6, 2025, at 6:51=E2=80=AFPM, dhlocker =
&lt;[email-masked]&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div>

 =20
    <meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3DUTF-8">
 =20
  <div text=3D"#000000" bgcolor=3D"#FFFFFF"><p>[Apologies to Jim for the =
duplicate response; I forget that I
      have to Reply to List for autox posts. Resending to list so all
      can jump on and criticise my response.]</p><p>The pieces are =
likely acrylic for which solvent welding is the
      cat's pyjamas (dog's nuts; some other animal's PPE)&nbsp;<a =
href=3D"https://www.acmeplastics.com/content/a-guide-to-gluing-acrylic-pla=
stic-to-plastic/" =
class=3D"moz-txt-link-freetext">https://www.acmeplastics.com/content/a-gui=
de-to-gluing-acrylic-plastic-to-plastic/</a>&nbsp;has
      good advice.</p><p>I don't trust any artificial plagiarism =
answers, FWIW.</p><p>Donald.</p>
    <div class=3D"moz-cite-prefix">On 10/5/25 10:52, Jim Stone =
wrote:<br>
    </div>
    <blockquote type=3D"cite" =
cite=3D"mid:[email-masked]">
      <meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3DUTF-8"><p>My granddaughter asked me to fix her favorite hair =
clip and I=E2=80=99d
        like to keep my reputation as Grandpa Fixit intact. The part
        that came off will be under stress when the clip is used. The
        plastic didn=E2=80=99t break; the larger, decorative part of the =
clip
        came loose from the spring clip. It looks to me like it was
        originally solvent welded, not glued. <br>
        <br>
      </p>
      <span =
id=3D"cid:[email-masked]">&lt;IMG_8004.jpeg&gt;</s=
pan><span =
id=3D"cid:[email-masked]">&lt;IMG_8005.jpeg&gt;</s=
pan><p><br>
        <br>
        I have never had tremendous luck gluing plastic but never tried
        solvent welding. Does anyone here have a recommendations for
        either a strong enough plastic glue or a readily available
        solvent that I could use to bond the two pieces and keep my
        reputation intact?<br>
        <br>
        Thanks,<br>
        <br>
        PaG, aka =
Jim</p><p>_______________________________________________<br>
        <br>
        <a class=3D"moz-txt-link-abbreviated" =
href=3D"mailto:[email-masked]">[email-masked]</a><br>
        Donate: <a class=3D"moz-txt-link-freetext" =
href=3D"http://www.team.net/donate.html">http://www.team.net/donate.html</=
a><br>
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        Archive: <a class=3D"moz-txt-link-freetext" =
href=3D"http://www.team.net/pipermail/shop-talk">http://www.team.net/piper=
mail/shop-talk</a>
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href=3D"http://autox.team.net/archive">http://autox.team.net/archive</a><b=
r>
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.com</a><br>
        <br>
      </p>
    </blockquote>
  </div>
=
_______________________________________________<br><br>[email-masked]=
m.net<br>Donate: http://www.team.net/donate.html<br>Suggested annual =
donation &nbsp;$12.96<br>Archive: =
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---

From: Brian Kemp <[email-masked]>
Date: Mon, 6 Oct 2025 17:54:12 -0700

I've had my fix-it reputation saved many times with E6000 adhesive.

Sample: 
https://www.homedepot.com/p/E6000-2-oz-Clear-Adhesive-800432/333376257

Fixed multiple special kid things.  Even reattached the bumper cover on 
my wife's car after she hit a pipe and tour the mounting tabs.

Brian

On 10/5/2025 7:52 AM, Jim Stone wrote:
> My granddaughter asked me to fix her favorite hair clip and I’d like to keep my reputation as Grandpa Fixit intact.  The part that came off will be under stress when the clip is used.  The plastic didn’t break; the larger, decorative part of the clip came loose from the spring clip.  It looks to me like it was originally solvent welded, not glued.
>
>
>
> I have never had tremendous luck gluing plastic but never tried solvent welding. Does anyone here have a recommendations for either a strong enough plastic glue or a readily available solvent that I could use to bond the two pieces and keep my reputation intact?
>
> Thanks,
>
> PaG, aka Jim
>
> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/[email-masked]
>

[email-masked]

Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/[email-masked]

---

From: Jim Stone <[email-masked]>
Date: Mon, 6 Oct 2025 20:59:18 -0400

I’ve got E6000 in my arsenal, too, but I don’t think it would hold up to the spring pressure of the clip.  But, it might be worth trying if the solvent doesn’t hold.  I will report back shortly.

> On Oct 6, 2025, at 8:54 PM, Brian Kemp <[email-masked]> wrote:
> 
> Sample: https://www.homedepot.com/p/E6000-2-oz-Clear-Adhesive-800432/333376257
> 
> Fixed multiple special kid things.  Even reattached the bumper cover on my wife's car after she hit a pipe and tour the mounting tabs.
> 
> Brian
> 
> 

[email-masked]

---

From: David Scheidt <[email-masked]>
Date: Tue, 7 Oct 2025 13:18:30 -0500

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On Oct 5, 2025, at 17:50, Jim Stone <[email-masked]> wrote:

=EF=BB=BFMy granddaughter asked me to fix her favorite hair clip and I=E2=
=80=99d like to
keep my reputation as Grandpa Fixit intact.  The part that came off will be
under stress when the clip is used.  The plastic didn=E2=80=99t break; the =
larger,
decorative part of the clip came loose from the spring clip.  It looks to
me like it was originally solvent welded, not glued.

Methylene chloride is the traditional solvent for acrylic welding. It is
now banned for most uses, so newer forulmulations use something else. I
have not used any of them, as I don=E2=80=99t work with acrylic. But I did =
do some
in the mists of time.  There were two types we used.  One was a thin liquid
(straight methylene chloride, or very nearly, I think) that was used for
fabricating stuff with tightly fitted gap free joints.  The other was a gel
that would work for joints with a gap, it had acrylic in it, I think, which
is what gave it gap filling power.  Pick the right sort, based on how well
your parts go back together.

--0000000000000f444306409599b7
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<div dir=3D"ltr"><div dir=3D"auto"><div id=3D"m_4421797582628636719AppleMai=
lSignature" dir=3D"ltr"></div><div dir=3D"ltr"><br></div><div dir=3D"ltr"><=
br><blockquote type=3D"cite">On Oct 5, 2025, at 17:50, Jim Stone &lt;<a hre=
f=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]</a=
>&gt; wrote:<br><br></blockquote></div><blockquote type=3D"cite"><div dir=
=3D"ltr">=EF=BB=BF<span>My granddaughter asked me to fix her favorite hair =
clip and I=E2=80=99d like to keep my reputation as Grandpa Fixit intact.=C2=
=A0 The part that came off will be under stress when the clip is used.=C2=
=A0 The plastic didn=E2=80=99t break; the larger, decorative part of the cl=
ip came loose from the spring clip.=C2=A0 It looks to me like it was origin=
ally solvent welded, not glued. =C2=A0</span><br></div></blockquote><div><b=
r></div><div><br></div>Methylene chloride is the traditional solvent for ac=
rylic welding. It is now banned for most uses, so newer forulmulations use =
something else. I have not used any of them, as I don=E2=80=99t work with a=
crylic. But I did do some in the mists of time.=C2=A0 There were two types =
we used.=C2=A0 One was a thin liquid (straight methylene chloride, or very =
nearly, I think) that was used for fabricating stuff with tightly fitted ga=
p free joints.=C2=A0 The other was a gel that would work for joints with a =
gap, it had acrylic in it, I think, which is what gave it gap filling power=
.=C2=A0 Pick the right sort, based on how well your parts go back together.=
=C2=A0=C2=A0</div><div dir=3D"auto"><br></div></div>

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[email-masked]

--===============1586733543329896389==--

---

From: Jim Stone <[email-masked]>
Date: Fri, 10 Oct 2025 18:25:20 -0400

--===============0494292322813791766==
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Just to update - and hopefully close - this thread, I bought this =
solvent from Amazon: =
https://www.amazon.com/dp/B0DS69HMN6?ref=3Dppx_yo2ov_dt_b_fed_asin_title. =
It was a little less expensive than the Weld-On and I figured it was =
probably the same formulation.  And, even this was probably more than =
the hair clip cost to begin with.  As many of the reviewers had noted, =
the solvent poured pretty readily out of the applicator, but it seemed =
to do its job just fine.  I =E2=80=98glued=E2=80=99 the hair clip back =
together and left it lightly clamped for 72 hours.  I just tested it and =
it seems to be holding well.  The package says that the bond continues =
to strengthen for several weeks so I will wait a bit longer to give it =
back to my granddaughter.  I will re-weld it and add in a small =
stainless screw and nut, should =E2=80=9Churricane Ellie=E2=80=9D break =
it again.

My thanks to all here for helping me keep my Grandpa Fixit status intact =
just a little longer.

Jim

> On Oct 7, 2025, at 2:18=E2=80=AFPM, David Scheidt =
<[email-masked]> wrote:
>=20
>=20
>=20
>> On Oct 5, 2025, at 17:50, Jim Stone <[email-masked] =
>>=20
>> =EF=BB=BFMy granddaughter asked me to fix her favorite hair clip and =
I=E2=80=99d like to keep my reputation as Grandpa Fixit intact.  The =
part that came off will be under stress when the clip is used.  The =
plastic didn=E2=80=99t break; the larger, decorative part of the clip =
came loose from the spring clip.  It looks to me like it was originally =
solvent welded, not glued. =20
>=20
>=20
> Methylene chloride is the traditional solvent for acrylic welding. It =
is now banned for most uses, so newer forulmulations use something else. =
I have not used any of them, as I don=E2=80=99t work with acrylic. But I =
did do some in the mists of time.  There were two types we used.  One =
was a thin liquid (straight methylene chloride, or very nearly, I think) =
that was used for fabricating stuff with tightly fitted gap free joints. =
 The other was a gel that would work for joints with a gap, it had =
acrylic in it, I think, which is what gave it gap filling power.  Pick =
the right sort, based on how well your parts go back together. =20

--Apple-Mail=_798BA3B8-1DE7-4D82-B51D-C12A73CF2098
Content-Transfer-Encoding: quoted-printable
	charset=utf-8

<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">Just to update =
- and hopefully close - this thread, I bought this solvent from =
Amazon:&nbsp;<a =
href=3D"https://www.amazon.com/dp/B0DS69HMN6?ref=3Dppx_yo2ov_dt_b_fed_asin=
_title">https://www.amazon.com/dp/B0DS69HMN6?ref=3Dppx_yo2ov_dt_b_fed_asin=
_title</a>. It was a little less expensive than the Weld-On and I =
figured it was probably the same formulation. &nbsp;And, even this was =
probably more than the hair clip cost to begin with. &nbsp;As many of =
the reviewers had noted, the solvent poured pretty readily out of the =
applicator, but it seemed to do its job just fine. &nbsp;I =E2=80=98glued=E2=
=80=99 the hair clip back together and left it lightly clamped for 72 =
hours. &nbsp;I just tested it and it seems to be holding well. &nbsp;The =
package says that the bond continues to strengthen for several weeks so =
I will wait a bit longer to give it back to my granddaughter. &nbsp;I =
will re-weld it and add in a small stainless screw and nut, should =
=E2=80=9Churricane Ellie=E2=80=9D break it again.<div><br></div><div>My =
thanks to all here for helping me keep my Grandpa Fixit status intact =
just a little =
longer.</div><div><br></div><div>Jim</div><div><div><br><blockquote =
type=3D"cite"><div>On Oct 7, 2025, at 2:18=E2=80=AFPM, David Scheidt =
&lt;[email-masked]&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div><div dir=3D"ltr"><div =
dir=3D"auto"><div id=3D"m_4421797582628636719AppleMailSignature" =
dir=3D"ltr"></div><div dir=3D"ltr"><br></div><div =
dir=3D"ltr"><br><blockquote type=3D"cite">On Oct 5, 2025, at 17:50, Jim =
Stone &lt;<a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>&gt; =
wrote:<br><br></blockquote></div><blockquote type=3D"cite"><div =
dir=3D"ltr">=EF=BB=BF<span>My granddaughter asked me to fix her favorite =
hair clip and I=E2=80=99d like to keep my reputation as Grandpa Fixit =
intact.&nbsp; The part that came off will be under stress when the clip =
is used.&nbsp; The plastic didn=E2=80=99t break; the larger, decorative =
part of the clip came loose from the spring clip.&nbsp; It looks to me =
like it was originally solvent welded, not glued. =
&nbsp;</span><br></div></blockquote><div><br></div><div><br></div>Methylen=
e chloride is the traditional solvent for acrylic welding. It is now =
banned for most uses, so newer forulmulations use something else. I have =
not used any of them, as I don=E2=80=99t work with acrylic. But I did do =
some in the mists of time.&nbsp; There were two types we used.&nbsp; One =
was a thin liquid (straight methylene chloride, or very nearly, I think) =
that was used for fabricating stuff with tightly fitted gap free =
joints.&nbsp; The other was a gel that would work for joints with a gap, =
it had acrylic in it, I think, which is what gave it gap filling =
power.&nbsp; Pick the right sort, based on how well your parts go back =
together.&nbsp;&nbsp;</div><div dir=3D"auto"><br></div></div>
</div></blockquote></div><br></div></body></html>=

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From: "[email-masked]" <[email-masked]>
Date: Fri, 10 Oct 2025 23:41:23 +0000

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