Indian Head Gasket Shellac Compound Part # PEX20539 Gasket Sealer - Indian Head Gasket Shellac - 2 oz Bottle - Each 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 ranges from 65 degrees Fahrenheit to 350 degrees 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.