Answer
Oct 11, 2021 - 03:17 AM
GBS Penetrating Concrete Sealer is designed for concrete that is porous, clean, dry and neutral pH. If the aggregate is very dense and not porous, then our product will not penetrate well. Best to test with by spritzing some water droplets on the surface and watch to see how long they take to soak in. If the droplets sit there for 5 min or longer, it may be too dense and may indicate that is was previously sealed. There are ways to mechanically or chemically etch the surface. Please call us for more details.
