This is amazing stuff I used for a 5 year old patio and it removed 98% of the black spots. I also used on an 18 year old patio that had not been cleaned for about 5 years that had very bad black spot and it has removed about 75% of them so very happy. Before and after pictures attached
2 years ago
HSD Online has a
4.9
average rating
from
1,639
reviews
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