Permatex
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Senior User
Joined: Jul 2014
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From: Memphis
Permatex
When replacing gaskets on valve covers, oil pan, and transmission pan, is this stuff (or equivalent products) a good thing to use?
I am asking about using it by itself.
If not by itself, do y'all think it's good to use WITH a rubber gasket?
Pros? Cons?
I am asking about using it by itself.
If not by itself, do y'all think it's good to use WITH a rubber gasket?
Pros? Cons?
Senior User
Joined: Sep 2009
Posts: 474
Likes: 3
From: Central Wisconsin
It depends.
I use it on things that I can get both surfaces very very clean and dry.
I have use it with paper type gaskets when I couldn't remove the shaft to get the paper over it. I cut a slit in the gasket, slid it around the shaft and then used the permatex to help seal the slit in the paper.
Good rubberized gaskets are all that is really necessary. If you don't think the rubber is going to make a good seal, then I don't think the permatex would either.
I use it on things that I can get both surfaces very very clean and dry.
I have use it with paper type gaskets when I couldn't remove the shaft to get the paper over it. I cut a slit in the gasket, slid it around the shaft and then used the permatex to help seal the slit in the paper.
Good rubberized gaskets are all that is really necessary. If you don't think the rubber is going to make a good seal, then I don't think the permatex would either.
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From: Memphis
I guess my thinking is that instead of having to go buy (or order) gaskets, this would be much simpler - just put a bead round the edge of whatever you need to seal.
That is, if the stuff works and is not a giant PITA to use.
I wouldn't want to use it for head gaskets or headers, but for the covers and pans, it seems like it might be simple and useful. Emphasis on SEEMS like it MIGHT be.
That is, if the stuff works and is not a giant PITA to use.
I wouldn't want to use it for head gaskets or headers, but for the covers and pans, it seems like it might be simple and useful. Emphasis on SEEMS like it MIGHT be.
Lead Driver
Joined: Aug 2003
Posts: 7,592
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From: **** hole San Jose ca.
You'll be sorry putting it on the valve covers or a pan. A sealer is only to be used on the upper side of the valve cover. One side of a gasket. If you don't use any gaskets and just use RTV you'll play hell to get them off. As you'll bend the hell out of them.
It's ok on thick metal parts tranny tail housing top shift covers & rear ends cover.
Not to be used on some thin stamped out stuff like valve covers & oil pans.
Most RTV/sealer for these old vehicle was used just to hold the gasket in place while installing the part..
Orich
It's ok on thick metal parts tranny tail housing top shift covers & rear ends cover.
Not to be used on some thin stamped out stuff like valve covers & oil pans.
Most RTV/sealer for these old vehicle was used just to hold the gasket in place while installing the part..
Orich
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From: DFW Texas
I have used copper high temp permatex for years to seal headers without gaskets. Works great every time. Can bee messy though.
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Lead Driver
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Orich
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Senior User
Joined: Jul 2014
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From: Memphis
Right. My question was really regarding a liquid gasket versus a rubber/neoprene/cork gasket.
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