ZENTEN WATERPROOFING TAPE NO. 6931 is a self-adhered, waterproofing airtight tape designed for sealing building joint areas. This product has a butyl rubber adhesive that offer superior adhesion durability. It is suitable for vertical or horizontal joints, ideal for waterproofing of joints in precast concrete facades, joints in walls, floors, balconies, around window or door frames, joints between brickwork, blockwork, masonry, wood and concrete or metal frames and joints between different building materials with dissimilar coefficients of expansion.