GAF Premium Acrylic HydroStop®Top Coat (Formally HydroStop® FinishCoat) is a professional grade, water-based, acrylic elastomeric coating that is part of the GAF Premium Acrylic HydroStop® System.

GAF Premium Acrylic HydroStop® Top Coat can be used over a variety of substrates to help provide protection against damage from exposure to UV and weather elements. Used in conjunction with GAF Premium Acrylic HydroStop® Base Coat and GAF Premium Fabric, it creates the GAF Premium Acrylic HydroStop® System, a liquid-applied membrane for recover, reroof and new roof applications.