RTV Gasket Maker vs. RTV Adhesive Sealant ???

I'm confused by the many different Permatex RTV sealants and gasket makers. I want to put something around the water passages on an intake that doesn't fit as well as I would like; I'm using a gasket, but want some added assurance that the gasket will seal.

Q) Do I want to use RTV GASKET MAKER or.. RTV SILICONE ADHESIVE?

Too many Permatex choices.

RTV is RTV. Yes it comes in various formulas for different apps Use the version that suits your needs..

I try to buy and use the silicone adhesive, not the standard gasket maker silicone Especially on intake gaskets

I like Permatex Ultra Grey.

I like blue RTV for water.. just the standard stuff, don't even know if it's called maker or sealant, just good old blue RTV.

And I bought a tube of clear GE silicone to do the gaskets on my ford 400 at Home Depot. Amazing how fast you can run a bead with a caulking gun!

R.

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And I bought a tube of clear GE silicone to do the gaskets on my ford 400 at Home Depot. Amazing how fast you can run a bead with a caulking gun!

R.

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Don't know if I'd use GE silicone, not sure it is formulated for engine heat, it could harden and crack, thus causing leaks.

I've had really good luck with Permatex Ultra Blue. Be sure to follow the directions EXACTLY. I find that allowing the product to "skin" before assembly really helps. Also allow the sealant to cure for a FULL 24 Hrs. before starting the motor. I've found that failing to allow the permatex to cure led to oil and water leaks.

Also in the case of solving oil or water leaks, cleanliness is absolutely critical. Wipe down any sealing surface with brake cleaner or acetone prior to using Permatex. Good sealing REQUIRES a surface that is COMPLETELY free of oil, grease, or water. This is particularly true of anti-freeze. Anti-freeze have corrosion inhibitors that act like an oil, if the parts being joined aren't completely free of anti-freeze the part will leak.

Finally DON'T over-torque your fasteners. Common leaks at the thermostat housing are almost always caused by over tightening.

Hope this helps.

Regards,

Joe Dokes