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 degree fahrenheit to 350 degree fahrenheit 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.