Chem-Calk® 915 - Construction Grade
A one-component, polyurethane, non-sag sealant, Chem-Calk 915 meets ASTM C-920, Type S, Grade NS, Class 25, Use NT, as well as US Federal Specification TT-S-00230C, Type II, Class A. Key applications include perimeter sealing of windows and doors, as well as masonry applications such as expansion and control joints.