BULL-BOND® ELASTOFILLER™ is a white, acrylic, waterproofing sealant and filler. This product is a high-solids, high-build sealant for filling, sealing and hiding cracks, joints and concrete imperfections in both exterior and interior applications. ELASTOFILLER™ can be used to seal: horizontal and vertical cracks in concrete roofs and masonry walls, concrete cold joints, shrinkage and movement cracks, roof penetrations, roofs seams and roof detailing work, flashings, masonry cracks, perimeter joints, etc.