<html><body>Alan-did not get another description from Permatex other than this which, if true, addresses your concerns:<div><br></div><div><div class="product_button clearfix" style="box-sizing: inherit; margin: 0px 0px 50px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: rgb(255, 255, 255); zoom: 1; width: 1170px; color: rgb(51, 51, 51); font-family: Roboto, sans-serif;"><a class="next_product" href="https://www.permatex.com/products/gasketing/gasket-sealants/permatex-ultra-rubber-gasket-sealant-dressing/" style="box-sizing: inherit; margin: 0px; padding: 0px 0px 0px 10px; font-size: 15.2px; vertical-align: baseline; background: transparent; color: rgb(0, 0, 0); text-decoration-line: none; -webkit-tap-highlight-color: transparent; border: 1px solid rgb(234, 234, 234); float: right;"><span style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: url("assets/images/next-button.png") center center no-repeat; display: block; width: 80px; height: 80px; text-indent: -9999px; overflow: hidden; float: right;">Prev Product</span><img src="https://518370.smushcdn.com/1781372/wp-content/uploads/2016/02/85409-150x150.jpg?lossy=1&strip=1&webp=1" alt="" style="box-sizing: inherit; margin: 5px 0px 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: middle; background: transparent; display: block; max-width: 100%; height: 70px; width: auto; float: left;"><h3 style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 16px; vertical-align: baseline; background: transparent; font-family: "Roboto Condensed", sans-serif; font-weight: 300; float: left; color: rgb(102, 102, 102); width: 280px; display: table; height: 80px;"><span style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: middle; background: transparent; display: table-cell;">Permatex<sup style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 8.8px; background: transparent; line-height: 0; position: relative;">®</sup> Ultra Rubber Gasket Sealant & Dressing</span></h3></a></div><div class="content" style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: rgb(255, 255, 255); float: right; width: 850px; color: rgb(51, 51, 51); font-family: Roboto, sans-serif;"><div class="woocommerce-notices-wrapper" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent;"></div><div itemscope="" itemtype="http://schema.org/Product" id="product-4316" class="post-4316 product type-product status-publish has-post-thumbnail product_cat-gasket-sealants first instock product-type-simple" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent; 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font-size: 12px; vertical-align: baseline; background: transparent; display: block;"><strong style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; background: transparent; font-size: 14px !important; color: rgb(14, 70, 117) !important;">US Part Number: 80697</strong><br style="box-sizing: inherit;">Canada Part Number: 58985</span></div><div class="pro_thumbnails" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent;"><div class="owl-carousel owl-loaded owl-drag" style="box-sizing: inherit; margin: 0px; padding: 20px 0px 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent; position: relative; width: 408px; z-index: 1;"><div class="owl-stage-outer" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent; 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margin: 0px 0px 2em; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent; float: right; width: 408px; clear: none;"><h1 class="product_title entry-title" style="box-sizing: inherit; margin: -8px 0px 15px; padding: 0px; border: 0px; outline: 0px; font-size: 43px; vertical-align: baseline; background: transparent; font-family: "Roboto Condensed", sans-serif; font-weight: 500; clear: none; color: rgb(0, 93, 171); line-height: normal;">Permatex<sup style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 23.65px; background: transparent; line-height: 0; position: relative;">®</sup> Copper Spray-A-Gasket<sup style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 23.65px; background: transparent; line-height: 0; position: relative;">®</sup> Hi-Temp Sealant</h1><p class="price" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 1.25em; vertical-align: baseline; background: transparent; color: rgb(119, 164, 100);"></p><div class="product_meta" style="box-sizing: inherit; margin: 25px 0px 0px; padding: 0px; border: 0px; outline: 0px; font-size: 14px; vertical-align: baseline; background: transparent; font-style: italic;"><span class="posted_in" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: baseline; background: transparent; color: rgb(102, 102, 102) !important;">Category: <a href="https://www.permatex.com/product-category/gasketing/gasket-sealants/" rel="tag" style="box-sizing: inherit; margin: 0px; padding: 0px; vertical-align: baseline; background: transparent; color: rgb(14, 70, 117); text-decoration-line: none; -webkit-tap-highlight-color: transparent;">Gasket Sealants</a></span></div><div class="product_content" style="box-sizing: inherit; margin: 20px 0px 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent;"><p style="box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; border: 0px; outline: 0px; font-size: 15px; vertical-align: baseline; background: transparent; line-height: 24px;">Fast-drying, metallic copper sealant helps dissipate heat, prevents gasket burnout and improves heat transfer. Fills minor surface irregularities. Seals instantly. Fills hot spots and surface imperfections. Temperature range -50°F to 500°F (-45°C to 260°C); resists all types of automotive fluids, especially gasoline. Level 3</p></div><div class="deeplink-products" style="box-sizing: inherit; margin: 10px 0px 2em; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent; clear: both;"><p style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 15.2px; vertical-align: baseline; background: transparent; text-align: center;"><a href="https://www.permatex.com/products/gasketing/gasket-sealants/permatex-copper-spray-a-gasket-hi-temp-sealant/#buynow" class="button open-popup-link" style="box-sizing: inherit; margin: 20px 0px 0px; padding: 10px; font-size: 1.5em; vertical-align: baseline; background: rgb(0, 93, 171); color: rgb(255, 255, 255); font-weight: 700; text-decoration-line: none; -webkit-tap-highlight-color: transparent; line-height: 1; cursor: pointer; position: relative; overflow: visible; border-radius: 3px; left: auto; border: 0px; display: inline-block; box-shadow: none; text-shadow: none; font-style: italic; transition: background 0.2s ease 0s;"><span class="fa fa-shopping-cart fa-lg" aria-hidden="true" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-style: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-weight: normal; font-stretch: normal; font-size: 1.33333em; line-height: 0.75em; font-family: FontAwesome; vertical-align: -15%; background: transparent; display: inline-block; text-rendering: auto; -webkit-font-smoothing: antialiased;"></span> Buy Online</a></p></div></div></div></div><br><div class="reply-new-signature"></div><p>I did have to remove a head for another reason, which had this coating, and it was not a problem. I guess time and mileage will tell how effective this product is. So far, I have been pleased to not have any issues with installed heads. Can't stress more strongly how overheating is the death knell for these engines. Hank</p><p>----------------------------------------------------------------------------------------------------------------</p><p>From: "Alan Seigrist"----------</p><healey.nut@gmail.com>To: gradea1@charter.net<br>Cc: "Bob Spidell", "Healey list"<br>Sent: Tuesday February 2 2021 7:54:17PM<br>Subject: Re: [Healeys] A90 Head Update<br><br>
<div dir="ltr">Hank -
<div><br></div>
<div>Is the spray on sealant silicone, or is it a non hardening
kind like hylomar? I'm a little concerned to use this as it
may make disassembly difficult later if I have to strip the engine
down again. What is your experience?</div>
<div><br></div>
<div>Thanks,</div>
<div><br></div>
<div>Alan</div>
</div>
<br><div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Feb 3, 2021 at 10:46 AM
<<a>gradea1@charter.net</a>>
wrote:<br></div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px .8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">
<div>Alan-two questions: do you know if the car overheated at any
time after the replacement of the head?
<div><br></div>
<div>Secondly, do you have any idea what torque they used to
tighten the head, even if they did not go in order?</div>
<div><br></div>
<div>A couple of us, who have been doing this for awhile, decided
on about 80 FT LBS. as max torque. There is no book spec. That is a
spec for that size stud and nut. The tightening order in the
workshop manual is strictly adhered to, and the torque is brought
up in 1/3 increments.</div>
<div><br></div>
<div>Again, I sprayed both sides of my copper gasket with a
light coating of Permatex copper seal.</div>
<div>I used a Payen gasket which was marked top/front. Yea, the
good old days...Hank<br><br><p>-----------------------------------------</p>
From: "Alan Seigrist"<br>
To: "Bob Spidell"<br>
Cc: "Healey list"<br>
Sent: Tuesday February 2 2021 6:07:37PM<br>
Subject: Re: [Healeys] A90 Head Update<br><br><div dir="ltr">
<div dir="ltr">Hi Bob -
<div><br></div>
<div>This gasket was put on the car only about 5K miles ago if you
can believe it, but the car sat for about 10 years
afterwards... I've checked both the head and deck with a
rectifier (see pic), both are very nicely flat and do not need to
go to the machinist. Both are flat to within 1/1000 on the
surface... which is less than the error on the rectifier!</div>
<div><br></div>
<div>I have the previously removed very old copper gasket which I
saved and it has no signs of gas leaking between cylinders compared
to this newer gasket that I just removed. I
discovered a few things:</div>
<div>
<ol><li>The old gasket is made with better quality, softer copper, and
is thicker than the newer gasket that was put on. The old
gasket that showed no problems is 1.8mm thick after being
installed, the new gasket that failed is 1.5mm thick after being
installed. The old gasket is very nicely marked as to
orientation, directions, copper compression rings are thicker,
etc., etc., Clearly the older gasket was made to work in
circumstances where the mating surfaces weren't always perfectly
flat.</li>
<li>I highly suspect the mechanics that installed the head last
time did not torque the head in the proper sequence, quite possibly
working from the outside in. </li>
<li>The head stud mount holes on the deck were raised a bit in
couple places and may have caused the head to deflect a little,
possibly, but they don't seem to have been enough to make a
difference... I have already filed those holes down. Micheal
Salter has told me to run a countersink to debur the hole.</li>
</ol><div>It's a weird one, I think possibly a combination of all three
issues above. Let's see how she goes after I finish the
job. Ultimately one thing I learned is I cannot anymore rely
on mechanics that I do not know well to do work on my car... I end
up having to redo everything.</div>
<div><br></div>
<div>Best,</div>
</div>
<div><br></div>
<div>Alan</div>
</div>
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0px 0px 0px .8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">
On 2/1/2021 11:23 PM, Alan Seigrist wrote:<br>
> All -<br>
><br>
> Got the head off. Sure enough the gasket blew between
3&4 . some<br>
> evidence of gas flow between 1&2 as well. Last pic is of
me standing<br>
> in the engine compartment lifting the head off, just to make
all of<br>
> you jealous ... :D<br>
><br>
> Cheers,<br>
><br>
> Alan<br>
><br><br>
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