Sealing Deteriorated High-Strength Floors Problems Molds and mildew, dampness, water seepage Examples of floors Floors in factories, prisons, warehouses, governmental or commercial buildings.
Typically, high-strength concrete (6 - 8,000 psi), 2 - 3 ft.
thick. Application Procedure
- Surface preparation:
Remove molds and mildew, paint or wax, adhesives, efflorescence,
and if applicable, open up the surface (see Surface Preparation below)
- Dampen the concrete:
Spray with water. Or, flood the surface with water, squeegee
off puddles, and let partially dry for 30 minutes.
- Spray on RadonSeal:
Use a mobile pesticide sprayer powered by battery or gasoline
engine or hand-pump sprayers. Or an airless sprayer set at 40-60 psi with
a lacquer tip and a long hose (100-150 ft.) for mobility.
Spray on RadonSeal Standard in two successive continuous-film
applications.
Coverage rate - 150 to 125 sq. ft./gallon for each application.
Do not over-spray, spread out any puddles with a broom.
Apply the 2nd application while still damp, 15 to 20 minutes
after the 1st.
Note: Extremely porous areas, which absorb the sealer in
less than 1 minute, will need a 3rd successive application while still damp.
- Clean-up:
In 6 to 12 hours after sealing, hose off the surface with
water and scrub with a deck brush to remove any residue. Or use a commercial
floor scrubber. Within the first several days, RadonSeal will purge minerals,
dirt, and efflorescence from the concrete - sweep up or shop-vac.
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. Surface Preparation Methods 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. Efflorescence:
Shot-blasting, steel brushes or RadonSeal Efflorescence Cleaner. Oil:
Novion Universal Concrete Sealer. Dirt:
Sweep and shop-vacuum. Clean with Universal Concrete Sealer. Hard-cap surface:
A very smooth, shiny finish from excessive power-trowelling.
Use the “eyedropper test” to check porosity. Shot-blasting or
sand-blasting. |
