CRC 1030743 Rigid Seal is a liquid anaerobic sealant supplied in a 50 ml bottle for locking and sealing threaded fittings and rigid flange joints. Maximum service temperature is 180 °C and maximum bonding gap 0.5 mm; the product cures in the absence of air between mating metal surfaces. Typical use is on pipe threads, hydraulic and pneumatic couplings, and static metal-to-metal flanges where a chemical gasket replaces a formed one.