Damtite 05500 Acrylic Bonding Liquid, 5 GallonHighlights: Size: 5 Gallon Interior Exterior Bonds new masonry materials to old Prevents separations, cracking and increases flexural strength For use with cement or plaster based mixes on both exterior and interior projects Liquid additive for Damtite powder waterproofers and other cement based, powder mixes Assures adhesion of coatings to previously painted surfaces, floors and non porous surfaces