Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => AmpTools/Tech Tips => Topic started by: jim on April 04, 2023, 08:47:20 pm

Title: high temp adhesive
Post by: jim on April 04, 2023, 08:47:20 pm

I  have a situation where I need to "glue" some filter caps to a vintage chassis (no holes drilled).  The chassis gets quite warm.  What is the best material to use?  Jim

Title: Re: high temp adhesive
Post by: acheld on April 08, 2023, 10:19:19 am

I use Permatex gasket sealer -- any of them work well.  They are, of course, designed for heat and stick to anything except silicone. 

The stuff is messy, so you do have to be careful when applying!

Title: Re: high temp adhesive
Post by: rake on April 10, 2023, 11:55:26 am

From all my years of hot rods, choppers & a drag car
make sure it's a hardening sealer. Some of that stuff
stays soft and sticky for years and is a MoFo to clean up!  :BangHead:

Title: Re: high temp adhesive
Post by: acheld on April 11, 2023, 10:21:51 am

Quote

Some of that stuff stays soft and sticky for years and is a MoFo to clean up!

I'm just a back yard mechanic, but I have have come across stuff like that.   Apologies, I should have used the correct term gasket "makers" rather than sealers.

Permatex Ultra Blue and UltraBlack are RTV gasket "makers;" when used as glue, they cure in 24 hours.  Yup, they can be messy to apply if you're not careful.  But once cured, can be scraped off a component without leaving a big mess. 

Title: Re: high temp adhesive
Post by: rake on April 11, 2023, 04:58:26 pm

Good old Permatex #1 is a fast drying form-a-gasket and sealant that's rated to 400 F.
Just read that off the tube. LOL.

Permatex #2 is just like a #2 except it doesn't dry out. It stays like baby poop.

Title: Re: high temp adhesive
Post by: acheld on April 11, 2023, 05:10:38 pm

LOL, I had no idea.   I've used Permatex for years as a high temp glue in amps.  Glad I never came across a #2 in the ACE hardware.  It would not have been pretty.  :l2:

Title: Re: high temp adhesive
Post by: rake on April 11, 2023, 05:21:40 pm

They use it a lot in race engines. Seals well but allows you to get stuff apart later.
It's like thermal paste. It sticks to every damn thing and won't wash off!