If you want to do it ONCE, do it with Krystol Internal Membrane (KIM)
If you want to do it ONCE, do it with KIM. There isn't a better product, Kryton's Krystol Internal Membrane last the lifespan of your concrete.
Krystol Internal Membrane (KIM) is a hydrophilic crystalline admixture used to create permanently waterproof concrete.
KIM contains Krystol technology. When added to concrete, Krystol chemically reacts with water and un-hydrated cement particles to form insoluble needle-shaped cry