Rear end RTV
Thread Starter
Melting Slicks
Joined: Jul 2000
Posts: 2,107
Likes: 14
From: Lancaster PA
Rear end RTV
Does it matter what kind or color of RTV is used on the rear end cover(bat wing). I've seen mostly red or orange being used and I know Right Stuff is good but how about Ultra Black. Will it work with gear lube? Thanks.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Originally Posted by CF6873
Does it matter what kind or color of RTV is used on the rear end cover(bat wing). I've seen mostly red or orange being used and I know Right Stuff is good but how about Ultra Black. Will it work with gear lube? Thanks.
Let it setup and pray you don't have to take it apart. No it comes apart but you will have to pry it apart and the stuff will stretch till it tears.
Thread Starter
Melting Slicks
Joined: Jul 2000
Posts: 2,107
Likes: 14
From: Lancaster PA
Pete, You say you had bad results with Ultra black. I assume that means it leaked? I really didn't want to use Right Stuff because of the difficulty of disassembly in the future. Thanks
Race Director
Joined: Feb 2004
Posts: 12,517
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I had ultra black fail on a lower intake. I also had a leak in a dana 36 case to batwing seal. I have avoided the right stuff for the same reason. I hears it is rough to get apart. Ultra Copper has never let me down.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by chucks88
I''m a big fan of "The Right Stuff" myself
I would put this stuff in my morning bowl of Wheaties if it wasn't toxic!!and because it comes in a pressurized can, you can work faster, and have better control of your bead thickness....
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Team Owner
Joined: May 2002
Posts: 24,337
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
The right stuff. 
I'm a believer after using it.
There are some pry points on the case, but it was still tough to seperate.
But maybe if your diff doesn't leak, you won't need to replace it.
I'm a believer after using it.There are some pry points on the case, but it was still tough to seperate.
But maybe if your diff doesn't leak, you won't need to replace it.
Former Vendor
Joined: Jun 2001
Posts: 7,204
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From: St Marys PA
Originally Posted by MikeC4
I would put this stuff in my morning bowl of Wheaties if it wasn't toxic!!and because it comes in a pressurized can, you can work faster, and have better control of your bead thickness....
No in all seriousness you can get the stuff apart pretty easily. But 1/2 of what bead was there will be on one half, and the other 1/2 will be on the other. Its good stuff, and yet has failed me. Best thing about it, is it NEVER gets hard or brittle, even in extreme heat situations. I have a glob fall down onto my header collector, and it was only noticable from under the car, so I left it on there. It lasted the entire season/summer of racing and driving on the street and I periodically checked it when the car was up on the lift. It never burned off, and was still very pliable. Not sure what the stuff is made of, but those headers I am sure after a few hundred 1/4 mile passes have seen there fair share of heat!
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by ski_dwn_it
Some people walk around work with cell phones on their belts or PDAs, I walk around with a can of the right stuff on mine.
yessirreee !! I bet Orthopedic surgeons use "The Right Stuff" for hip, knee and joint replacements.......
Team Owner
Joined: May 2002
Posts: 24,337
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
They didnt have any in stock yesterday, so I bought "The Right Stuff - for imports"
What a marketing scam. I suppose it'll leak if I put it on my corvette.
What a marketing scam. I suppose it'll leak if I put it on my corvette.
Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
Originally Posted by CentralCoaster
They didnt have any in stock yesterday, so I bought "The Right Stuff - for imports"
What a marketing scam. I suppose it'll leak if I put it on my corvette.
What a marketing scam. I suppose it'll leak if I put it on my corvette. 
Team Owner
Joined: Sep 2003
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From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
You may also look at running a thread of silk around the inner perimeter of the mating surface. This acts as a "gasket" in cooperation with the sealant.
