CreteDefender is a non-toxic, non-hazardous chemical that reacts with the calcium and lime in concrete. This reaction creates a gel that fills the permeable zones in concrete (pores, micro-cracks, shrinkage cracks, etc.). This reaction penetrates up to 5 inches into the concrete and permanently seals the concrete against water, salt, and a variety of chemicals. Used on sidewalks, driveways, bridges and roadways, parking structures, decks, warehouse floors, factory floors. Anywhere where concrete is exposed to salt, brines, or freezing cycles. Available in 5 gallon and 55 gallon drums.