Answer
Oct 12, 2021 - 09:05 AM
Penetrating sealers are difficult to strip completely because they are inside the concrete. Strippers are designed to remove surface coatings and not penetrating sealers. Our SealGreen Oil Cleaner Degreaser is not a stripper it is an oil cleaner degreaser. From the look of the picture, you submitted it looks like the old penetrating sealer was still effective in some areas and that is why when you applied our SealGreen Penetrating Concrete Sealer it did not absorbed in some areas, and it just dry on the surface creating a blotchy look. Our advice is to let the concrete alone for couple of years to allow for the original sealer to totally go away.
1. You can assess the progress by just wetting the concrete and to see if the blotching is fading.
2. Are the white stains on the concrete dusty when it is dry? If so please look at https://sealgreen.answerbase.com/3755053/does-your-sealer-leave-a-chalky-residu
e-after-first-applied
3. If the white stains are not dusty, then is a conflict between the new and the old sealer. Just give it time and the old sealer will go away slowly.
DO NOT attempt to remove the sealer by blasting the surface of the concrete with a pressure washer you will damage the surface permanently and not clean the problem.
Source: SealGreen Website
