From 1789alpine at gmail.com Sun Oct 5 08:52:04 2025 From: 1789alpine at gmail.com (Jim Stone) Date: Sun, 5 Oct 2025 10:52:04 -0400 Subject: [Shop-talk] Plastic epoxy/solvent weld Message-ID: 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. -------------- next part -------------- A non-text attachment was scrubbed... Name: IMG_8004.jpeg Type: image/jpeg Size: 80577 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: IMG_8005.jpeg Type: image/jpeg Size: 57146 bytes Desc: not available URL: -------------- next part -------------- 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 From shop-talk2 at mcfetridge.org Sun Oct 5 18:40:16 2025 From: shop-talk2 at mcfetridge.org (Ian McFetridge) Date: Sun, 5 Oct 2025 20:40:16 -0400 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: References: Message-ID: 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 recommended 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 firmly 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 chloride. - *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 taping 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?48 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?PM Jim Stone <1789alpine at gmail.com> 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_______________________________________________ > > Shop-talk at autox.team.net > Donate: http://www.team.net/donate.html > Suggested annual donation $12.96 > Archive: http://www.team.net/pipermail/shop-talk > http://autox.team.net/archive > > Unsubscribe/Manage: > http://autox.team.net/mailman/options/shop-talk/shop-talk2 at mcfetridge.org > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From dhlocker at protonmail.com Mon Oct 6 16:51:39 2025 From: dhlocker at protonmail.com (dhlocker) Date: Mon, 06 Oct 2025 22:51:39 +0000 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: References: Message-ID: [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.] 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. I don't trust any artificial plagiarism answers, FWIW. Donald. On 10/5/25 10:52, 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 > > _______________________________________________ > > Shop-talk at autox.team.net > Donate: http://www.team.net/donate.html > Suggested annual donation $12.96 > Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive > > Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/dhlocker at protonmail.com -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: IMG_8004.jpeg Type: image/jpeg Size: 80577 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: IMG_8005.jpeg Type: image/jpeg Size: 57146 bytes Desc: not available URL: From markmiller at threeboysfarm.com Mon Oct 6 18:22:00 2025 From: markmiller at threeboysfarm.com (Mark Miller) Date: Mon, 6 Oct 2025 17:22:00 -0700 Subject: [Shop-talk] Plastic epoxy/solvent weld (Jim Stone In-Reply-To: References: Message-ID: <1c7aa220-89fd-4720-b821-d9aa819e2780@threeboysfarm.com> I'd consider going to a local plastic shop? and ask them for recommendations and/or to do it (bring donuts and/or a five dollar bill in case they offer this....). Locally we have a Tap Plastics and they have always been super friendly and helpful. Their solvent info: https://www.tapplastics.com/repair_products/plastic_adhesives?srsltid=ARcRdnozESFT-zR_f00FYSgu7nDSGwQygKkungKzHnqwhdifNt0M0X-c Regards, Mark Miller 707-490-5834 markmiller at threeboysfarm.com On 10/5/2025 7:52 AM, shop-talk-request at autox.team.net wrote: > Send Shop-talk mailing list submissions to > shop-talk at autox.team.net > > To subscribe or unsubscribe via the World Wide Web, visit > http://autox.team.net/mailman/listinfo/shop-talk > or, via email, send a message with subject or body 'help' to > shop-talk-request at autox.team.net > > You can reach the person managing the list at > shop-talk-owner at autox.team.net > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Shop-talk digest..." > > > Today's Topics: > > 1. Plastic epoxy/solvent weld (Jim Stone) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 5 Oct 2025 10:52:04 -0400 > From: Jim Stone <1789alpine at gmail.com> > To: Shop Talk > Subject: [Shop-talk] Plastic epoxy/solvent weld > Message-ID: > Content-Type: text/plain; charset="utf-8" > > 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. > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: IMG_8004.jpeg > Type: image/jpeg > Size: 80577 bytes > Desc: not available > URL: > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: IMG_8005.jpeg > Type: image/jpeg > Size: 57146 bytes > Desc: not available > URL: > -------------- next part -------------- > > > 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 > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Shop-talk mailing list > Shop-talk at autox.team.net > http://autox.team.net/mailman/listinfo/shop-talk > > > ------------------------------ > > End of Shop-talk Digest, Vol 19, Issue 147 > ****************************************** > From 1789alpine at gmail.com Mon Oct 6 18:43:11 2025 From: 1789alpine at gmail.com (Jim Stone) Date: Mon, 6 Oct 2025 20:43:11 -0400 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: References: Message-ID: Thanks, guys. I think it is acrylic, too and will give it a try. I can always try glue if solvent doesn?t work, but it is unlikely to work the other way around. Something new for my arsenal! > On Oct 6, 2025, at 6:51?PM, dhlocker wrote: > > [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.] > > 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. > > I don't trust any artificial plagiarism answers, FWIW. > > Donald. > > On 10/5/25 10:52, 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 >> >> _______________________________________________ >> >> Shop-talk at autox.team.net >> Donate: http://www.team.net/donate.html >> Suggested annual donation $12.96 >> Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive >> >> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/dhlocker at protonmail.com >> >> > _______________________________________________ > > Shop-talk at autox.team.net > Donate: http://www.team.net/donate.html > Suggested annual donation $12.96 > Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive > > Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/1789alpine at gmail.com > -------------- next part -------------- An HTML attachment was scrubbed... URL: From bk13 at earthlink.net Mon Oct 6 18:54:12 2025 From: bk13 at earthlink.net (Brian Kemp) Date: Mon, 6 Oct 2025 17:54:12 -0700 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: References: Message-ID: <7161deb4-cccd-4555-b0b3-a802f2762791@earthlink.net> 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 > > _______________________________________________ > > Shop-talk at autox.team.net > Donate: http://www.team.net/donate.html > Suggested annual donation $12.96 > Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive > > Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/bk13 at earthlink.net > From 1789alpine at gmail.com Mon Oct 6 18:59:18 2025 From: 1789alpine at gmail.com (Jim Stone) Date: Mon, 6 Oct 2025 20:59:18 -0400 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: <7161deb4-cccd-4555-b0b3-a802f2762791@earthlink.net> References: <7161deb4-cccd-4555-b0b3-a802f2762791@earthlink.net> Message-ID: <477653FB-652D-4ADE-A3D3-956D5951B4CB@gmail.com> 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 wrote: > > 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 >> >> _______________________________________________ >> >> Shop-talk at autox.team.net >> Donate: http://www.team.net/donate.html >> Suggested annual donation $12.96 >> Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive >> >> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/bk13 at earthlink.net >> > From 1789alpine at gmail.com Mon Oct 6 19:04:03 2025 From: 1789alpine at gmail.com (Jim Stone) Date: Mon, 6 Oct 2025 21:04:03 -0400 Subject: [Shop-talk] Plastic epoxy/solvent weld (Jim Stone In-Reply-To: <1c7aa220-89fd-4720-b821-d9aa819e2780@threeboysfarm.com> References: <1c7aa220-89fd-4720-b821-d9aa819e2780@threeboysfarm.com> Message-ID: <5631C03F-C369-409E-88A7-9528A8B150A9@gmail.com> Sadly, no plastic shops anywhere near me and Tap charges $20 for delivery. I?ve ordered some from Amazon. We'll see... > On Oct 6, 2025, at 8:22?PM, Mark Miller wrote: > > I'd consider going to a local plastic shop and ask them for recommendations and/or to do it (bring donuts and/or a five dollar bill in case they offer this....). Locally we have a Tap Plastics and they have always been super friendly and helpful. > Their solvent info: https://www.tapplastics.com/repair_products/plastic_adhesives?srsltid=ARcRdnozESFT-zR_f00FYSgu7nDSGwQygKkungKzHnqwhdifNt0M0X-c > > Regards, > > Mark Miller 707-490-5834 > markmiller at threeboysfarm.com > > On 10/5/2025 7:52 AM, shop-talk-request at autox.team.net wrote: >> Send Shop-talk mailing list submissions to >> shop-talk at autox.team.net >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://autox.team.net/mailman/listinfo/shop-talk >> or, via email, send a message with subject or body 'help' to >> shop-talk-request at autox.team.net >> >> You can reach the person managing the list at >> shop-talk-owner at autox.team.net >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of Shop-talk digest..." >> >> >> Today's Topics: >> >> 1. Plastic epoxy/solvent weld (Jim Stone) >> >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Sun, 5 Oct 2025 10:52:04 -0400 >> From: Jim Stone <1789alpine at gmail.com> >> To: Shop Talk >> Subject: [Shop-talk] Plastic epoxy/solvent weld >> Message-ID: >> Content-Type: text/plain; charset="utf-8" >> >> 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. >> >> -------------- next part -------------- >> A non-text attachment was scrubbed... >> Name: IMG_8004.jpeg >> Type: image/jpeg >> Size: 80577 bytes >> Desc: not available >> URL: >> -------------- next part -------------- >> A non-text attachment was scrubbed... >> Name: IMG_8005.jpeg >> Type: image/jpeg >> Size: 57146 bytes >> Desc: not available >> URL: >> -------------- next part -------------- >> >> >> 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 >> >> ------------------------------ >> >> Subject: Digest Footer >> >> _______________________________________________ >> Shop-talk mailing list >> Shop-talk at autox.team.net >> http://autox.team.net/mailman/listinfo/shop-talk >> >> >> ------------------------------ >> >> End of Shop-talk Digest, Vol 19, Issue 147 >> ****************************************** >> > _______________________________________________ > > Shop-talk at autox.team.net > Donate: http://www.team.net/donate.html > Suggested annual donation $12.96 > Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive > > Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/1789alpine at gmail.com > From dmscheidt at gmail.com Tue Oct 7 12:18:30 2025 From: dmscheidt at gmail.com (David Scheidt) Date: Tue, 7 Oct 2025 13:18:30 -0500 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: References: Message-ID: On Oct 5, 2025, at 17:50, Jim Stone <1789alpine at gmail.com> 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. 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?t 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. -------------- next part -------------- An HTML attachment was scrubbed... URL: From cspalding360 at gmail.com Wed Oct 8 12:38:10 2025 From: cspalding360 at gmail.com (Chuck Spalding) Date: Wed, 8 Oct 2025 11:38:10 -0700 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: References: Message-ID: This discussion has been very interesting, because I have struggled with glueing plastics. However the key point, to me, has not been mentioned: How to identify the *type* of plastic. Can somebody provide clues? Another challenging question (for me): What product works well on polyethylene and polypropylene, *and* has a good shelf life. I have used "Loctite Super Glue All Plastics", which works well but is expensive and has a short shelf life after being opened. Chuck On Wed, Oct 8, 2025 at 11:17?AM wrote: > > Message: 1 > Date: Tue, 7 Oct 2025 13:18:30 -0500 > From: David Scheidt > To: Jim Stone <1789alpine at gmail.com> > Cc: Shop Talk > Subject: Re: [Shop-talk] Plastic epoxy/solvent weld > > [snip] > > 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?t 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. > > [snip] > > End of Shop-talk Digest, Vol 19, Issue 151 > -------------- next part -------------- An HTML attachment was scrubbed... URL: From fishplate at gmail.com Wed Oct 8 14:10:22 2025 From: fishplate at gmail.com (Jeff Scarbrough) Date: Wed, 8 Oct 2025 16:10:22 -0400 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: References: Message-ID: I keep my CA (super glue) in a ziploc bag in the refrigerator. I've had a little tube last years like that. On Wed, Oct 8, 2025 at 3:06?PM Chuck Spalding wrote: > This discussion has been very interesting, because I have struggled with > glueing plastics. > > However the key point, to me, has not been mentioned: How to identify the > *type* of plastic. Can somebody provide clues? > > Another challenging question (for me): What product works well > on polyethylene and polypropylene, *and* has a good shelf life. I have > used "Loctite Super Glue All Plastics", which works well but is expensive > and has a short shelf life after being opened. > > Chuck > > On Wed, Oct 8, 2025 at 11:17?AM wrote: > >> >> Message: 1 >> Date: Tue, 7 Oct 2025 13:18:30 -0500 >> From: David Scheidt >> To: Jim Stone <1789alpine at gmail.com> >> Cc: Shop Talk >> Subject: Re: [Shop-talk] Plastic epoxy/solvent weld >> >> [snip] >> >> 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?t 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. >> >> [snip] >> >> End of Shop-talk Digest, Vol 19, Issue 151 >> > _______________________________________________ > > Shop-talk at autox.team.net > Donate: http://www.team.net/donate.html > Suggested annual donation $12.96 > Archive: http://www.team.net/pipermail/shop-talk > http://autox.team.net/archive > > Unsubscribe/Manage: > http://autox.team.net/mailman/options/shop-talk/fishplate at gmail.com > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From 1789alpine at gmail.com Fri Oct 10 16:25:20 2025 From: 1789alpine at gmail.com (Jim Stone) Date: Fri, 10 Oct 2025 18:25:20 -0400 Subject: [Shop-talk] Plastic epoxy/solvent weld In-Reply-To: References: Message-ID: Just to update - and hopefully close - this thread, I bought this solvent from Amazon: https://www.amazon.com/dp/B0DS69HMN6?ref=ppx_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 ?glued? 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 ?hurricane Ellie? 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?PM, David Scheidt wrote: > > > >> On Oct 5, 2025, at 17:50, Jim Stone <1789alpine at gmail.com > 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. > > > 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?t 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. > -------------- next part -------------- An HTML attachment was scrubbed... URL: