Caulk 149 is a highly flexible, two-component, 100% solids, chemically resistant sealant. It will withstand repeated expansion and contraction and remain resilient through daily and seasonal cyclic changes in temperature. Caulk 149 is to be used as a general purpose expansion joint sealant designed for splash and spill and secondary containment of moderate strength acids, alkalis and some solvents typically found in industrial chemical processing.