SFO-BIO RTU is a water-based concrete form oil. It is considered both a barrier-type and a chemically reactive type release agent, because it is manufactured with all natural vegetable oils. It was developed to provide clean positive stripping while eliminating bug holes and build-up. The key to SFO-BIO RTU is the reaction of the fatty acid with the free lime on the surface of the concrete. This reaction causes the formation of metallic soaps, which are water insoluble and chemically inert. This metallic soap is what allows for the easy release of the product from the form and also allows the entrapped air on the vertical walls of the form to rise more easily to the fresh concrete surface.