White to off-white, 1-part, low strength, high viscosity, anaerobically-cured, methacrylate ester, acrylic thread sealantLOCTITE 565 is a white to off-white, 1-part, low strength, high viscosity, anaerobically-cured, methacrylate ester, acrylic thread sealant designed for the locking and sealing of metal pipes and fittings. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration.