Akwaswell is a caulk grade, single component swelling paste used to stop water infiltration through concrete construction joints. It is a specially formulated polyurethane-based material with a hydrophilic agent dispersed evenly throughout the paste. The key to Akwaswell's effectiveness is its 200% swelling capacity when wetted and its plasticity to contour the surrounding surface. Akwaswell is installed with a standard caulk gun and self adheres to dry concrete surfaces; no mechanical fastening or adhesives required. This swelling action creates a positive Seal against the concrete in construction joints and stops the flow of water through the joint. It has been successfully tested to of hydrostatic pressure when properly installed in concrete joints.