PermaDry™ Molded Rubber Valve Cover Gasket Set (VS50507R) by Fel-Pro®. With Grommets & Spark Plug Tube Seals. PermaDry™ premium molded-rubber is designed for those applications that utilize a molded-rubber gasket as Original Equipment. Molded-rubber gaskets are precision-designed to work with the valve cover or oil pan, which often has a special groove formed or cast into it. Engineers determine the exact amount of “squeeze” needed to achieve a secure seal.