But I also "ALWAYS" use FELPRO blue GASKETS and this has worked for many many years on all my engines,chevy,mopar etc. I have had people say silicone is a gasket and if you use it don't use gaskets there is no need! I have had people tell me by using that method it will leak!.All I can say is it has worked well for me for years and I continue to do it that way. I don't like fixing what ain't broke!