Xtra Performance Polyurethane Adhesive Environmentally friendly Replaces solvent-based adhesives; safe to use indoors or out;no odor complaints Permanently bonds together almost anything Case Of 12 10oz Cartridges GATOR BLOCK BOND ADHESIVE is one of the strongest polyurethane adhesives on the market. It is especially formulated for bonding concrete, natural stones, blocks, bricks and pavers. GATOR BLOCK BOND ADHESIVE is intended to provide a permanent bond to approved materials. GATOR BLOCK BOND ADHESIVE can be used on dry or humid surfaces. Overlays and pool copings Steps and wall caps Fire pits (up to 400°F (204°C)) Concrete pavers and stones Dry and damp surfaces Permanent bond in 24 hrs