What Gasket Sealant for Thermostat

[34_South]

I will be replacing the Thermostat on my engine.

The repair manual states to "coat both sides of the new gasket with gasket sealing compound". Now I walked into my local auto part store the other day, and was dumbfounded by the huge selection - silicone, rubber, RTV, gasket makers, etc, etc.

What is a good "gasket sealant" to use for the thermostat gasket?

34S.

 

[Bt Doctur]

Re: What Gasket Sealant for Thermostat

Permatex Aviation Liquid Sealant

 

[WizeOne]

Re: What Gasket Sealant for Thermostat

I never use a 'sealant' on the thermostat housing. If the mating surfaces are good, I just use the gasket and coat the housing surface with Gasgacinch. It is a light adhesive that allows you to remove the gasket without having to chisel it off.

http://www.gasgacinch.com/gasgacinch_002.htm

I use it for auto and marine. Never had a leak or a weep.

 

[Phantom_II]

Re: What Gasket Sealant for Thermostat

I never use a 'sealant' on the thermostat housing. If the mating surfaces are good, I just use the gasket and coat the housing surface with Gasgacinch. It is a light adhesive that allows you to remove the gasket without having to chisel it off.

Heh...

I don't use any gasket seal at all, and I still have to chisel it off.

 

[havasuboatman]

Re: What Gasket Sealant for Thermostat

smear a thin coat of clear silicone on both sides of the gasket and it wont leak OR have to be chisled off next time.

 

[ken_23434]

Re: What Gasket Sealant for Thermostat

Mine is currently using ONLY RTV... no gasket.

Generally, most auto related repair manuals stress do not use RTV and a gasket. One or the other.

If I read that statement while working on my boat, I would grab my Mercruiser Perma-Seal stuff, though.

 

[Gary H NC]

Re: What Gasket Sealant for Thermostat

If you use Boat Doctors advice it is a very thin coat of aviation gasket sealant. Its a liquid and non-hardening,will not leak and the next time the gasket will come right off.
Silicone has no place on a boat engine.....