Product Details: The Permatex Metal Muffler and Tailpipe Sealer is the perfect solution for sealing metal components in your vehicle. This sealer is designed to be used on RTV originally sealed components, such as intake manifolds, oil pans and valve covers. It is oil-resistant, low volatility, non-corrosive and low odor, so it won't damage any surfaces or sensors. FleetPride is your First Click in Heavy Duty®.