Permatex Indian Head Gasket Shellac Compound is a hard setting, economical sealant, sealing all common gasketing materials in low temperature and low pressure applications. This sealant is the original quality formula. Temperature range from 65°F to 350°F and resists diesel fuels and most shop fluids. When a chemical gasket is not an option, Permatex offers a wide range of gasket sealants suitable for applications on both import and domestic vehicles of any model year or performance caliber.