The McCormick 6637641A2 is a genuine Loctite 574 Flange Sealant, supplied in a 50ml tube. This high-performance anaerobic sealant is specifically designed for sealing rigid metal flanges, preventing leakage of oil, water, and other fluids. It cures in the absence of air when confined between close-fitting metal surfaces, providing excellent resistance to vibration and thermal expansion. Ideal for use in engines, transmissions, and various other assemblies in McCormick agricultural equipment.