Valco HYLOMAR Universal blue gasket sealer is the leading non-setting gasket and sealing compound in use worldwide. It is used by many of the world's major automotive manufacturers and by several Formula 1 teams. It is non-hardening and non-setting, vibration resistant, seals surface imperfections and withstands rapid variations in temperature. Allows metal-to-metal contact and is resistant to combustion products, water, engine coolant, petroleum, lubricating oils, kerosene and fluorocarbon refrigerants. Dresses gaskets, threads and seals gaps up to 0.25mm.