Aloha from Hawaii! Fourteen months ago a contractor replaced our concrete driveway. Although I said I wanted to seal it after it cured with a penetrating sealer, he insisted it be coated with “J-12 Crete-Cure” immediately after the pour, saying it was a “wax” that would not penetrate and could be removed by power-washing. He applied it unevenly, puddling and running, causing permanent variation in color of the cured concrete from white to medium-gray and a dark “run” down the middle of the sloped section.

J-12 Crete-Cure was applied full-strength (mfr says to dilute with up to 4 parts water). Was left to puddle (mfr says squeegee off excess immediately). And it chemically reacts with and penetrates the surface.  (I found out these “details” after the fact.)

Need to “fix” it. Concrete acid color-stains say do not apply if a sealer or curing agent was used, so that’s out. Same with other sealing products which cannot penetrate. Do not think a non-penetrating product will adhere. Only reasonable suggestion so far is to use a commercial floor-cleaning machine with bristle brush attachment and strong alkali stripper, which hasn’t been tried yet. Other options, such as applying a resurfacing agent 1/4-1/2″ thick may be a last resort.

Help, please?  Mahalo! (Thank you)