Whether your roof is large or small, flat or sloped, GacoFlex S20 Series Solvent-Free 100% Silicone Roof Coatings provide a proven, guaranteed solution for renewing your weathered and leaking roof. They can be applied to virtually any existing roof to create a durable, glossy, seamless membrane that seals and protects against permanent ponding water, ultraviolet light and severe weather. By re-coating, you not only extend the life of your roof, you avoid the need for a time-consuming and costly roof tear-off. GacoFlex S20 Series are ideal for use as a maintenance coating system over a variety of substrates including but not limited to:
- Pre-existing elastomeric roof coating
- Metal roofs
- Built-up roofing
- Mineral cap sheet
- Weathered single ply membranes (EPDM, PVC, Hypalon®, and TPO/CPA)
- May be used over concrete, coatings, and over plywood decking
Additionally, GacoFlex S20 is ideal for use as part of a rainwater catchment system and is the standard specification for liquid applied silicone coating used in sprayed-in-place polyurethane foam roofing systems.
THEORETICAL COVERAGE: 1.5 gallons per 100 sq. ft. to yield approximately 22 dry mils. NOTE: Application rate is job specific and losses due to overspray, surface profile, and wind may occur. Additional material may be required to achieve 22 dry mils.
- Weight: 96.5% (Method 4041 - Fed. Std. 141)
- Volume: 95%
VOC: 37 g/l (0.309 lb/gal)
MIXING: Mix before application to ensure uniform color and consistency.
THINNING: Product should not be thinned.
ASPHALT ROOFING SEALER: As an option to help inhibit bleed-through on asphaltic and bitumen-containing substrates, first apply 1 coat of GacoFlex A4207 BleedTrap Sealer for Asphalt Roofing at a rate of 100 sq. ft. per gallon to yield 8 dry mils.
PRIMING: Existing silicone coatings should not be primed. On all other substrates, apply GacoFlex E5320 2-Part Epoxy Primer/Filler according to label directions.
APPLICATION: Apply by brush or 3⁄4" nap woven roller as received. For spray application, use as received; consult Gaco Western’s Silicone Spray Guide SG-Silicone for more information. For cold weather application, keep material stored above 65°F (18°C). Do not apply if rain is expected within 1 hour. For application in temperatures below freezing or above 120°F (49°C), contact Gaco Western.
On smooth surfaces, apply one coat at the rate of 1.5 gallons per 100 square feet to achieve approximately 22 dry mils. On granulated and other rough surfaces, apply two separate coats at the rate of 1 gallon per 100 square feet per coat. Allow first coat to dry a minimum of 4 hours at 55°F (13°C) or higher, or until it can be safely walked on (product is moisture cure, low humidity will result in longer dry times); recoat within 4 to 48 hours.
Coat all surfaces including expansion joint covers and flashings. Extra material is required at all edges and penetrations if neoprene sheet flashing is not used.
NOTE: Application rate is job-specific and losses due to overspray, surface profile and wind may occur. Additional material may be required to achieve 22 dry mils.
DRY TIME: Final coat should be allowed to cure 24 to 48 hours, depending on temperature and humidity, before suitable for light foot traffic.
SHIPPING NOTE: May ship via common carrier which requires a delivery appointment when shipped to residential addresses.
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DetailsCurrent Stock:SKU: S2000-5Weight: 60.00 LBSWidth: 13.00Height: 15.00Depth: 13.00