This premium interior/exterior acrylic primer is formulated to meet the performance requirements of the residential and commercial markets. Seal Grip® Interior/Exterior Acrylic Universal Primer/Sealer is especially formulated to block most stains - water, smoke, ink, markers, and tannin. Seal Grip® has exceptional adhesion to glossy surfaces. Also recommended as a whole house primer for use on properly prepared interior or exterior wood, masonry, plaster, wallboard, cement, brick, stucco, cement composition board, and wall coverings.