A one-part multi purpose tie-coat or sanding and adhesion primer for above the waterline combining all characteristics of separate substrate primers in one. It offers excellent adhesion to wood, fiberglass, steel, stainless steel, aluminum, galvanized metal, copper and most other bare or painted substrates. Features include exceptional covering capability, high build, good grain filling and corrosion prevention on steel. For Fiberglass, hard plastics, steel, wood, aluminum - zinc: bonding and transition primer for interior and exterior use above the waterline. Repair and filling primer on existing one and two-component primers/paints and fully cured, degreased and coarsely sanded epoxy layers. Transition coat between one-component and two-component PU finish and reverse.