BDC Efflorescence Block is an extremely versatile, clear sealer and coating. It is formulated for use over concrete with high levels of alkalinity. It is a highly versatile emulsion polymer, which provides many of the chemical resistant performance attributes of more expensive 2K water borne epoxy and polyurethane dispersions. The excellent water, alkali and efflorescence resistance of this product, in combination with its exterior durability and its ability to adhere to a variety of substrates, allow it to be used in many applications.