930 TPO Primer is a water based, clear, acrylic primer. It is formulated with a unique, premium acrylic resin that is designed to enhance the adhesion of acrylic coatings to aged TPO single ply membranes. #930 TPO Primer eliminates the need of a special base coat that is required when applying acrylic coatings to TPO membranes. Use ElastaHyde #720 ARC or #790 AFC as base and top coatings after application of #930. Not for use over EPDM, PVC or other single ply membranes.