We had a sealer with anti-slip treatment and it did not last a full season. I was looking for another option and Charles at Cover Tec was the only one who took the time to respond and suggest a solution. It was to strip the old product (not a Cover Tec product) and use the Surface Grip Treat anti-slip treatment. The pool deck is now the safest it has ever been. No more slippery patio. I would highly recommend this company and its products.