Farm Equipment - Head gasket coating/sealer

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Head gasket coating/sealer

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=125188
Printed Date: 20 Jun 2025 at 9:49am
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Topic: Head gasket coating/sealer

Posted By: Allis dave
Subject: Head gasket coating/sealer
Date Posted: 29 Jun 2016 at 9:34am

Finally back to working on this engine and hope to get the head on this weekend.

I bought the reliance engine kit and it comes with a composite head gasket. Head was milled, but block deck is a little off standout .002-.008. Read here if interested.
http://www.allischalmers.com/forum/forum_posts.asp?TID=120989&title=installing-wd45-engine-sleeves-question" rel="nofollow - http://www.allischalmers.com/forum/forum_posts.asp?TID=120989&title=installing-wd45-engine-sleeves-question

What's the best Head gasket coating to use? I usually see guys use the copper sealer, but I saw MACK say in a recent post that he always uses Hi-Tack and never liked the copper. I don't see on the Hi-Tack spray bottle where is says for head gaskets, but both say good to 500 degrees. I'd look up manufacturer recommendations, but there's no brand label on the kit. What does everyone have the best luck with?

Replies:

Posted By: TREVMAN
Date Posted: 29 Jun 2016 at 10:58am

Spray on Copper Coat, cant beat it, jmho, Trev.

Posted By: jange01
Date Posted: 29 Jun 2016 at 11:20am

Usually a composite head gasket will not require sealer. I only use sealer on all metal head gaskets. In those cases I use another Permatex product called Aviation Gasket Sealer #80017. This is a dark brown product that unlike Hi-Tack can be applied without the stringy mess of Hi-Tack. Also it doesn't cement the gasket in place. It can be applied with a small roller or brush. Just remember not to use too much. Probably 90% or more applied will just be squeezing out anyway.

Jim

Posted By: injpumpEd
Date Posted: 29 Jun 2016 at 12:41pm

The best head gasket sealant is Hylomar, in a spray can.

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!

Posted By: nickia
Date Posted: 29 Jun 2016 at 5:11pm

alumium paint brush it on wont have any trouble