Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker
Permatex makes some of the best silicone sealants around. While they are primarily made for automotive applications, they can be used for a variety of other purposes as well. If you need a sealant for machinery or engines, especially one in which the sealant is going to come into contact with oil and other automotive chemicals, this one's for you. Drawn from Permatex's extensive line of automotive sealants, this is one of their "ultra" line, a series of sealants designed for extreme applications. This sealant has the highest resistance to oil and other automotive chemicals you can find. Additionally, it's fast drying so you can get your engine back together quickly. While this isn't a high temperature sealant, it can withstand temperatures up to 500 degrees and retains a high degree of flexibility.