Ultra Black or RTV silicone?

[MaxGlide]

I just bought some Permatex Ultra Black to do the oil pan gasket and water pump gasket. I just found some generic RTV, temp goes to 375’F, in my garage. Can I use this or better to use Ultra Black (temp 450’F)?

 

[Scott06]

Ultra black.

 

[MaxGlide]

Ultra black.

Figured that!

 

[Grub54891]

Yes ultra-black. I've heard recently they make a gray type that is better. haven't tried it yet though.

 

[Scott Danforth]

for oil, ultacopper is better than the ultrablack. for the water pump, the ultra grey is what to use.