Best Rtv Sealant For Valve Cover Gasket. Valve covers water pumps timing covers thermostat housings oil pans transmission pans. Is an RTV Room Temperature Vulcanized Silicone gasketing material designed for use in mechanical assemblies where the existence of higher continuous temperatures up to 550º F or 650º F intermittent might exist.
There are a number of sealant choices too. Permatex 80022 Sensor-Safe Blue RTV Silicone Gasket Maker 3 oz. You dont need the high temp stuff.
Secondly is a valve cover gasket leak serious.
The RTV sealant is strategically placed in small amounts along with the gasket to ensure a better seal. This would be oil pans or valve cover gaskets. Joined Nov 4 2009 184 Posts 8 Sep 11. Valve covers water pumps timing covers thermostat housings oil pans transmission pans.