Molds and mildew, dampness, water seepage
Floors in factories, prisons, warehouses, governmental or commercial buildings.
Typically, high-strength concrete (6 - 8,000 psi), 2 - 3 ft. thick.
Note: In case there is still excessive water vapor transmission after 30 to 60 days of curing, the concrete requires a secondary sealer - Ion-Bond Armor. Alternatively, let the concrete dry out for 10 days and spray on 2 applications of Ion-Bond Armor.
Shot-Blasting - the preferred method for complete cleaning and opening up the surface, removing paint or efflorescence. Alternative methods – a disk sander with 16 grit sandpaper, a diamond grinder, a scarifier, sand-blasting, water-or soda-blasting.
Molds and mildew:
A solution of chlorine bleach (25–50%) or borate with detergent, or RadonSeal Efflorescence Cleaner. The safer solution for indoors is BioZap Mold and Mildew Cleaner. Call a professional for extensive mold infestation.
Paint or adhesives:
Sand- or water-blasting. RadonSeal paint stripper, or Universal Concrete Cleaner for latex or acrylic paints.
Shot-blasting, steel brushes or RadonSeal Efflorescence Cleaner.
Novion Universal Concrete Sealer.
Sweep and shop-vacuum. Clean with Universal Concrete Sealer.
A very smooth, shiny finish from excessive power-trowelling. Use the “eyedropper test” to check porosity. Shot-blasting or sand-blasting.