This document discusses Anti-Hydro, a non-corrosive admixture that has been used since 1904 to integrally waterproof concrete and increase its workability, strength, hardness, and durability. Anti-Hydro reacts with portland cement to produce more complete hydration, reducing water requirements and shrinkage while increasing early and ultimate strength. This results in impermeable, dense, durable concrete that is hard and non-dusting. The document further explains that Anti-Hydro works by raising the hydration of cement mixes to 95%, yielding denser, harder materials that are impermeable to water and act as a vapor barrier. Anti-Hydro also accelerates hardening and allows faster installation, especially important for