Looking for a Good Sealant

Cure: Harden

Sealant: Material that creates a barrier

Molded Parts: Material that is injected into a mold cavity in order to create a part.

I'm not really sure what you're asking for...

I am trying to find a sealant that can cure rather quickly (<5min) withstand up to 600°F and 500psi. There are no sealants that will cure in <5min. and be capable of operating at 500PSI and 600°F.

I am experimenting with molding parts How does this enter into the equation? Are you hopiing to mold a part, then bond/seal it in place? so it cannot contain RTV silicone and produce as little volatiles. Fluorosilicones are the only material that might go to 600°F.

cured cord stock and then bond it with some type of fast curing sealant that can deal with that environment you might find some type of foundry material that could work. Iron oxide filled silicones come as close as anything, but it sounds like you don't want them.

Good luck.

Seal what material to what material? Min/max gap to be filled?

To what gases/chemicals will the cured sealant be exposed? Does the pressure and/or temperature remain steady, or do they cycle?

Is this needed for an emergency/temporary fix, or permanent use in continuing production?

Seal what material to what material? Min/max gap to be filled? Normally I use liquid RTV silicone to seal two silicone cord stock pieces together but due to a regulation I'm not allowed to use RTV anymore.

To what gases/chemicals will the cured sealant be exposed? Does the pressure and/or temperature remain steady, or do they cycle? The sealant will be exposed to various types of resins i.e. epoxy, polyimide, bmi.

Is this needed for an emergency/temporary fix, or permanent use in continuing production? This is a permanent change in production.

Sorry guys I am new here and don't know what kind of information you all would need in order to make a proper recommendation. Any suggestions that would help you guys?

>Normally I use liquid RTV silicone to seal two silicone cord stock pieces together but due to a regulation I'm not allowed to use RTV anymore.

For what industry/country have these been banned? Can you tell us a bit more about the application/industry so we can offer better suggestions?

We seem to be a little short on information here. Have you considered brazing the mold together? High temperature. Cures in under 5 min. No volatiles. Ta. Da.

I don't think we'd be able to use those as this has to be pretty user friendly as well as quick.

I faced the same thing on another thread on sealing leaks in a water column. I ended up going to J&B weld.

I didn't even think of that! That is such a great idea!

Are you trying to seal the mold in which you are making parts? Are you trying to seal the parts after they come out of the mold?

What kind of material is being used on both of the parts that you are trying to seal.

If you need a gasket, you may have to make one. You can make a high temp gasket out of fiberglass fibers and high temperature Permatex which is sometimes used to seal exhaust manifolds to engine blocks where the temperature get as high as 3255 deg F.