Loctite 518 300mlLOCTITE 518 is a medium strength sealant which cures when confined in the absence of air between close fitting metal surfaces. Typical applications include sealing close fitting joints between rigid metal faces and flanges. Provides resistance to low pressures immediately after assembly of flanges. Typically used as a form in place gasket on rigid flanged connections, e. g. transmissions and engine casings.