WPA SB Primer is a fast drying, solvent based primer, with exceptional penetrating properties. WPA SB Primer is designed to assist in improving adhesion on porous and some non-porous substrates. WPA SB is suitable for new or old concrete, brick and block work, compressed cement sheeting, villaboard, plywood, as a primer for r acrylic coatings as well as PVC flanges and pipes, aluminium, copper and stainless steel.