Herco PSC Primer Sealer - One Quart Primer Coat used prior to application of Herco H-55 Pond Coating (not included). Seals new concrete and ensures proper bonding of the coating. 100% Fish-Safe product with high elongation, excellent adhesion, and durability. Absorbs deep into concrete pores and cures quickly. One quart of Herco PSC Primer covers approximately 20 to 25 square feet. Herco Primer is part of the Herco Pond Coating system. Easy to apply with brush or roller. Professional results every time!