Costar Pro Plug
Costar Pro Plug, a rapid set, chloride free, ready to use powder waterstop. Costar Pro Plug becomes a rapid setting plugging mortar/slurry upon contact with water which can be used to seal leaks as a pre-treatment to the installation cementitious waterproofing membrane. Costar Pro Plug is a single component, cementitious non-shrink, hydraulic cement, specifically designed to withstand strong hydrostatic pressure.