DAP /Bondex bonding liquid and floor leveler additive is a versatile product that can be used as a glue to bond new concrete to old and as an additive to increase adhesion and flexibility in plaster, mortar, concrete, floor leveler, stucco, and waterproof cement paint. For use indoors or outdoors. DAP Concrete Floor Leveler, Model No. 10414 (Sku 288403) and No. 10416 (Sku 270091), must be mixed with DAP Bonding Liquid & Floor Leveler Additive, Model No. 35090 (Sku 270051) or No. 35082 (Sku 272092).