Can this be applied over black mastic?
Green Building Supply, Penetrating Concrete Sealer
Concrete & Masonry Sealers
Status:
Open Jun 29, 2025 - 03:44 AM
1answer
Answer
Jun 30, 2025 - 12:14 PM
It cannot. The only thing we have for mastic is a remover: FranMar 500MR Mastic Remover. If that is what you are wanting to do, order a small sample to test first. We have nothing at all to just use as a "sealer" over mastic.
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Green Building Supply, Penetrating Concrete Sealer
Safe, permanent waterproofing sealer for concrete, masonry, stucco or brick
GBS Penetrating Sealer is a waterborne polyester polymer and polyurethane that works best on concrete, brick, stucco and masonry. It waterproofs and preserves with 3-5 coats, plus it comes with a 15-year waterproofing w...
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