The Loctite 5910 Flange Sealant, identified by part number LC40370, is a high-performance, flexible, non-corrosive silicone-based gasketing product designed for superior oil resistance. This sealant is ideal for applications requiring good resistance to oil and joint movement. It is commonly used for sealing flexible flanges with machined or cast surfaces, such as stamped sheet metal covers (e.g., timing covers and oil sumps). The product cures on exposure to moisture in the air to form a tough, flexible silicone rubber gasket. It offers excellent adhesion to a variety of substrates and is suitable for use in automotive and industrial settings where reliable sealing against oils and other fluids is critical.