Odorless and VOC-free, TK-LS Hard Lithium Silicate reacts with the free lime in concrete to produce calcium silicate hydrate, an ingredient that facilitates hardness, density, and durability. Because the solution is water-based, it works on surfaces that cannot tolerate solvent-based systems. It provides increased strength to old, deteriorating, or weak floors and surfaces subject to heavy traffic and abrasion. TK Products. www.tkproducts.com