I bought a 0.38mm thick COPPER head gasket for my motor. I have never used one before; I always used the paper/metal/paper type with the metal ring around the bore part. Well, anyway, do I need to use any sort of sealant on the gasket? Silicone sealants always say on the tube not to use where it might contact gas and specifically say don't use it for head gaskets. The only reason I ask is that paper gaskets compress and shape themselves to seal between the head and cylinder deck, but I don't think a copper gasket will compress much at all. So basically, do I need sealer and if so what kind?