Answer
Oct 25, 2021 - 02:42 PM
From The picture it looks like the concrete absorbed more SealGreen 1500 Mastic Remover in some areas than others. This is common in old floors because they were not trowel as even as the new concrete floors. That is why you have the dark spots. Please follow the same procedure in the video to wash the floor using the floor maintainer instead of just the stiff brush. This will help pull more of the penetrated cleaner.
How to remove black mastic and wash the floor video
Source: SealGreen Website
