Primer of high penetrating ability and adhesion for polyurethane sealants. Necessary on porous surfaces such as concrete, plaster, bricks, clay roof tiles, cement boards, aircrete, marble, etc. Necessary for expansion joints on terraces, as well as for joints around door and window casements. It ensures unbreakable seals with long lasting durability.
15-20ml/linear meter, depending on the width and depth of the joint