3M Polyurethane Sealant 540, Gray, is a versatile adhesive designed for construction, transportation, and general industrial applications. It has a solids weight percent of approximately 90% and a full cure time of 24 hours. This sealant has a hardness of 40 Shore A and a tensile strength of 250 psi. It can be applied using the liquid method, and its application temperature ranges from 5 ℃ to 35 ℃. With a maximum operating temperature of 90 ℃ and a minimum operating temperature of -40 ℃, it can withstand various conditions. Suitable for sealing metal surfaces, this permeable sealant comes in a 600 mL sausage pack and is sold in cases of 12.