Gasket Sealant Question
Thread Starter
Instructor
Joined: Mar 2003
Posts: 111
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From: Oakton VA
Gasket Sealant Question
Hi, guys,
I've used Permatex High Tack sealant on my engine fuel pump and thermostat housing. They were thin paper gaskets that seemed to need some help from a sealant. Now I'm installing a new fuel tank and I'm not sure if I should use the same goop on the cork gasket for the filler neck. Does the cork gasket need help from a sealant such as High Tack?
Thanks,
Dick
I've used Permatex High Tack sealant on my engine fuel pump and thermostat housing. They were thin paper gaskets that seemed to need some help from a sealant. Now I'm installing a new fuel tank and I'm not sure if I should use the same goop on the cork gasket for the filler neck. Does the cork gasket need help from a sealant such as High Tack?
Thanks,
Dick
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
I don't consider "Hi-tac" to be a good gasket sealer. It is used primarily to hold things in place for reassembly (i.e., keeping O-rings and square-cut sealrings in grooves, etc.). Black Permatex gasket sealer is a better choice, IMO.
GM Cert Corvette Tech
Joined: Apr 2008
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From: Anaheim Hills California
Instructor
Joined: Apr 2005
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I've found in my 31 years as a boat mechanic the best gasket sealant to be permetex "aviation" sealant. It has helped seal any and all o-rings and gaskets I've come across. It was used by OMC for years as a sealant. It goes on easy and doesn't harden up, if you get interupted, one may go back the next day and it's still soft and ready to use.
It's also great for threads on bolts in salt water. I use a small can in about 2 months. It goes a long way.
It's also great for threads on bolts in salt water. I use a small can in about 2 months. It goes a long way.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
For 'thick' cork gaskets (ie, valve covers), I would not use a sealant either. On thin ones, a thin wipe of Permatex on each side will create a good seal.
I might add that thick gaskets are best if they are a 'blend' of cork and rubber, rather than all cork.
I might add that thick gaskets are best if they are a 'blend' of cork and rubber, rather than all cork.
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