BDuPontTM StoneTech� Professional Sealer - 1 Gallon ReviewbP PP DuPontTM StoneTech� Professional Sealer - 1 Gallon PFormulated with advanced, water-based fluorochemicals to protect against oil and water-based stains.PAdvanced penetrating microbond protection Standard protection against all stainsPProvides economical, natural look protection for all natural stone, masonry and grout.