SurfKoat Aqualon S-400 is an economical sodium silicate concrete densifier, hardener and sealer used in the process of polishing concrete. Aqualon S-400 creates a permanent dust-proof surface by reducing the porosity of the concrete and hardening the surface. Densifiers actually become a permanent part of the concrete itself, and will not peel, scratch or wear away due to heavy traffic. After application of Aqualon S-400, a floor polisher can then be used to create a high-gloss finish.
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A good economical hardener.
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Aqualon S-400 is a low-cost sodium-silicate densifier for creating a hard dense concrete surface for polishing. Sodium-silicates are slower to react than lithium-silicates, so allow a little more time before firing up the polisher.
Cleaning and Preparation Instructions
Do not apply to any surface that is dirty, frozen, or heavily saturated or flooded with water. Surface must be clean and free of all debris, dry, and absorbent. Mist water in a small area to test the surface for absorbency. Any surface to be treated should uniformly wet out. If the surface to be treated does not wet out uniformly, it is then recommended to prepare the surface mechanically to increase porosity and to remove any remaining surface contaminants.
We do not recommend application of any hardener or densifier to any concrete slab that has been cured less than 28 days.
All concrete surfaces should be clean and completely dry before application.
Basic application (if not polishing):
Apply at a rate of 200-300 sq. ft. per gallon using an industrial grade sprayer with a 0.5 gal./min. fan tip, lint free mop, or soft bristle push broom. Ensure floor saturation for 30-60 minutes, removing any puddle areas with a soft bristle push broom. Apply more Aqualon S-400 to areas that appear to be more porous and are absorbing the material more. Rework any excess material with a soft bristle broom. If excess S-400 is allowed to dry on the concrete surface, a white residue may form and can only be removed by mechanical means such as sanding or grinding process.
After completing the 400 grit stage of polishing, apply a saturating, uniform coat of Aqualon S-400 at a rate of 200-300 sq. ft. per gallon using an industrial grade sprayer with a 0.5 gal./min. fan tip, lint free mop, or soft bristle push broom, ensuring floor saturation for 30-60 minutes. Do not allow to puddle. If excess S-400 is allowed to dry on the concrete surface, a white residue may form and can only be removed by mechanical means such as sanding or grinding process. Follow through with additional polishing steps until desired appearance is achieved. Additional applications of Aqualon S-400 can be added at any stage before the final polishing phase is done if necessary at a rate of 200-300 sq. ft. per gallon. Remove any excess residue with polishing diamonds or polishing pads. Flushing with water is not necessary. Note: For softer concrete an initial application of Aqualon S-400 can be applied after the 80 grit stage prior to the standard polishing steps to achieve a harder surface.
Of course, having the right tools will make your job easier, so scroll to the bottom to see our recommended Sprayers, Brushes and Application Tools!
Coverage Rates: Coverage rates are approximate and will vary depending on substrate density, porosity and temperature. In most cases, 2-3 coats are required. Coverage rates based on total combined two coat application.
Troweled concrete: 125-300 sq. ft. / gallon