TECHNICAL DATA SHEET ACS-210 True-Seal Acrylic Concrete Sealer / Primer Special features Moisture barrier up to 8# or 85% RH Use as primer over epoxy sealer Use prior to any STAUF leveling compound or adhesive Patent No 8,680,193

Product Description STAUF ACS-210 True-Seal is a pure acrylic-based sealer for professional flooring installation. It does not contain any solvents, isocyanates, or other harmful materials. It is, therefore, ozone and environmentally safe, certified as "very low emissions", and certified "green". ACS-210 is uniquely developed to mitigate the moisture pressure from a humid subfloor to an acceptable level for flooring installation and to bridge minor cracks in the subfloor. ACS-210 spreads easily and creates a dust-free and evenly absorbent surface ready for installation of flooring. It has superior coverage and dries very quickly. Pre-Installation Checklist A successful installation requires proper preparation of the subfloor. Read and understand all applicable guidelines and technical data sheets before installation. Follow industry standards and flooring manufacturers' recommendations for subfloor moisture content, design, layout, and application of flooring materials. All flooring material's backing must be solid, sound, and free of anti-adherents. All slab constructions must meet the specific requirements of the floor covering to be installed. Sub Floor Examination Prior to installation, the subfloor must be checked according to applicable installation guidelines. It must be solid and sound, flat, permanently dry, clean, free of chaps, indentations, and anti-adherents, as well as resistant to pressure and tension. The moisture content of all floors must be measured before installation. Moisture content in concrete subfloors must be below 8#/24hr/1,000SF using the Calcium Chloride Test or less than 85% RH using the in-situ test per ASTM F1869 and F2170. Use epoxy moisture barrier for higher moisture installations. Prior to installation, the subfloor must be checked according to applicable installation guidelines. It must be solid, sound, clean, porous, free of chaps, anti-adherents, and resistant to pressure and tension. Confirm sufficient porosity by performing a water drop test according to ASTM F3191-16. Check for missing or compromised vapor barriers and hydrostatic pressure by carrying out RH or CaCl moisture tests following ASTM standards F1869-16 or F2170-19. Results of 99% RH or 25# CaCl could indicate a higher moisture content in the slab than what tests can measure, and there might be hydrostatic pressure and/or a compromised or missing vapor barrier. Sub Floor Preparation The condition of the subfloor will determine which type of mechanical treatment is required (e.g. wire brushing, sanding, grinding, or shot blasting). Dust, paint, curing compounds, sealers, residual adhesives, or other surface contaminants MUST be removed and a porous surface achieved by suitable means. The extent of subfloor preparation can only be determined at the site by the installer. Clean the surface with an industrial vacuum cleaner and tack the floor with a damp microfiber mop before application. Do not use sweeping compounds unless they are water-based as most others will contain oil or wax which will act as an anti-adherent and prevent primers, sealers, leveling compounds, coatings, and/or adhesives from bonding to the concrete. Cracks and gaps must be treated prior to application of primers, sealers, leveling compounds, coatings, and/or adhesives (for details see Technical Information #19 @ www.staufusa.com). Installation Procedure Shake before use and apply sealer undiluted with the appropriate applicator. Make sure the sealer is spread evenly. Do not exceed the maximum coverage. Higher temperatures speed up the drying time. Limitations When using other than STAUF products in conjunction with STAUF primers, sealers, leveling compounds, or adhesives, STAUF denies any and all responsibility for any ensuing problems and/or damages without prior written authorization from STAUF. Do not use on subfloors with a moisture reading above 8#/24hr/1000SF (Calcium Chloride Test) or 85% (RH with in-situ probe). In case of an accident, injury, spill, or exposure, see SDS for information. Consult the Technical Data Sheet at www.staufusa.com for updated information. Do not dilute primer/sealer or mix with other products.

General Features Works under any type of flooring Dries in less than 2 hours Contains no solvents Contains no VOC (calc. per CA Rule 1168) Nonflammable Ozone friendly Dispersion base cleans with water Works under any STAUF adhesive Bridges cracks Freeze/thaw stable (with limitations) Installation Features Very low odor Cleans with warm water and soap Spreads easily Good penetration of subfloor Dries quickly Higher temp will shorten drying time Suppresses minor cracks in concrete slabs No risk of sensitization Long Term Features Improves bonding of STAUF leveling compounds Improves bonding of STAUF water-based adhesives Improves bonding of STAUF alcohol-based adhesives Improves bonding of STAUF urethane-based adhesives Improves bonding of STAUF polymer adhesives Moisture barrier up to 8# or 85% RH using XBL10 Suitable for radiant heat systems No health hazards Approved Subfloors Concrete Slabs Wet Concrete Slab up to 8#/24hr/1,000SF and 85% RH Epoxy Sealers (100% solid, cured) Approved Trowels and Spread Rate Sealer: XBL10 (7/64 x 5/64 in): up to 80 SF/gal. Primer: Foam or Short Nap Roller: up to 500 SF/gal Drying Time Approx. 2 hours or until clear Temperature Range during Installation 50-90F (10-32C) Relative Humidity Range during Installation 30% - 80% Packing Size 2-1/2 gal. Plastic Jug 75 per pallet Density [lbs./gal.] 8.6 Color Cream pH value of concrete Must be below 12.4 Storage Above 32F (two freeze/thaw cycles down to 10F okay) Shelf Life 12 Months in original, unopened container Transportation Above 32F (two freeze/thaw cycles down to 10F okay) Revision: 2022-04-18 13:50:16