Since I have had this leak I have gone through three sets of intake gaskets and each time they did not even come with the rubber china wall gaskets at all. They came with a small tube of black rtv silicone. It is hard for me to use silicone at all, I was always taught that if it has a gasket do not use silicone as that is what the gasket is for. And I have seen what using to much silicone can do to an engine especially when it is used to excess.