Product Data Sheet
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Water Repellant Penetrating Sealer
PENTREAT 244-40 is a penetrating, 40% active silane sealer that reduces water and salt penetration in concrete and masonry structures. PENTREAT 244-40 is a hydrophobic, impregnating sealer that helps prevent chloride-induced corrosion of rebar, scaling, spalling, freeze-thaw damage on properly designed and placed concrete.
PENTREAT 244-40 is designed for use on horizontal and vertical, new and existing concrete and masonry above-grade surfaces. Suitable applications include residential, commercial, industrial, and municipal projects. PENTREAT 244-40 can be used on parking structures, driveways, plazas, stadiums, patios, walkways, median barriers, bridge decks and piers, ramps, traffic barring concrete, marine structures, vehicular repair and wash down facilities, and loading docks.
- High-performance, breathable, penetrating, superior water repellent sealer.
- Provides an effective salt screen.
- Keeps treated surfaces cleaner.
- Minimizes penetration from de-icing chemicals, salt, water, etc., that may damage concrete/masonry surface.
- Can help reduce spalling of new concrete surfaces.
- Will extend the life of concrete and masonry structures.
- Chemically bonds to the substrate, preventing liquid absorption while allowing excellent vapor transmission.
- Leaves no residue/Requires no cleaning after application.
5 Gallon (18.9 L) Pails
55 Gallon (208.2 L) Drums
Unless otherwise directed by applicable specifications, the rate of coverage should be 100 – 150 ft.2/gal. (2.45 – 3.68 m2/L). Coverage is approximate and may vary depending on surface finish/texture, concrete condition, climatic conditions, etc. Always apply to a test area first to determine actual coverage rate before full-scale application.
When stored indoors in original, unopened containers at temperatures between 40° – 90° F, optimum performance and best use is obtained within two years of date of manufacture.
- NCHRP 244 Series II
- NCHRP 244 Series IV
- AASHTO T259/T260
- ASTM E514
- ASTM C642
- ASTM C672
- National EPA VOC Emission Standard for Architectural Coatings
VOC Content: 600 g/L
Surface Preparation … Surfaces must be structurally sound, clean, and free from dirt, efflorescence, and stains. For optimum results, wait 28 days before applying PENTREAT 244-40 to new concrete. Concrete surface must be clean and dry with all stains, oil, grease, dust, dirt, and curing compounds removed prior to application.
Application Method … Apply with a low-pressure airless sprayer, such as a Chapin 19069 with a 0.1 GPM (0.379 LPM) spray rate, allowing PENTREAT 244-40 to flood the surface.
Horizontal Surfaces … Apply in a single pass. Completely saturate the surface and leave wet for 3 – 5 minutes. Then brush out or broom all pools and puddles of material from surface.
Vertical Surfaces … Apply two coats wet on wet. Do not allow the first coat to fully dry before applying the second.
Test Application … Always perform a small test application on each type of surface prior to full scale application to determine suitability and final appearance. Test using the recommended application instruction. Let area dry thoroughly before inspection.
Drying Time … Product dries quickly. Drying times will vary depending on application rate, temperature, humidity, and project conditions. Restrict foot traffic for at least four hours at 68° F (20° C). Twelve hours is preferable.
FOR OUTSIDE/EXTERIOR APPLICATION ONLY. PENTREAT 244-40 IS COMBUSTIBLE. KEEP AWAY FROM ALL OPEN FLAMES, SPARKS, IGNITION SOURCES, etc. Use with adequate ventilation and block all HVAC ventilation ducts which may spread product vapors – vapors are flammable and heavier than air. Do not use as a waterproofing or vapor barrier. PENTREAT 244-40 will not block vapor transmission through defective substrates, such as cracked or improperly repaired surfaces. PENTREAT 244-40 should never be in contact with bituminous products. On vertical applications, protect window panes and window frames that will be painted from contact with PENTREAT 244-40.
Treated surface must be protected from rain for six hours minimum, but 12 hours is preferable. Do not over-apply. For optimum performance, the residual moisture of the concrete must not exceed 4%. The application temperature should be between 40 – 90° F (4.4° – 32.2° C). The surface temperature should be 5.5° F above the dew point.
Should it suddenly start to rain, stop treatment and cover impregnated areas. Do not over apply. Do not allow puddling or running to occur.
May help contribute to LEED credits:
- MRc9: Construction and Demolition Waste Management