TREMPRO® 638 SSL is a high performance, low modulus, one-component, semi-self leveling polyurethane sealant. The sealant cures to a flexible rubber when exposed to atmospheric moisture.
Most of the sealants have a 12-month shelf life based on the manufacturing date and batch numbers from the tubes or cases.
Tremco recommends that our sealants be applied at substrate temperatures of 40°F (5°C) and rising to 120°F (49°C).
