Well my Valve cover gasket is leaking of course, and I'm getting really tired dealing with it. I was wondering what is the best type of sealant to use when replacing the valve cover gasket? I saw on "TheSAABsite" they recommend Loctite 518 but I want to get the job done tomorrow. I see like stuff from Permatex black/grey/blue/copper RTV. So many choice but what do you guys use? I just need some straight forward answer.