Gaco Flex 100% Silicone Roof Coating Solvent Free
GacoFlex S20 Series coatings are solvent-free 96% solids, single-component waterproof elastomeric
moisture-curing silicone coatings.
GacoFlex S20 Series are ideal for use as a maintenance coating system over pre-existing
elastomeric roof coatings, metal roofs, built-up roofing, mineral cap sheet, and weathered single ply
membranes (EPDM, PVC, Hypalon®, and TPO/CPA) on a roofing substrate where the membrane
surface is in sound condition, but requires a renewal of the membrane surface due to the normal
effect of aging and use.
GacoFlex S20 Series Coatings are the standard specification for liquid applied silicone coating used
in sprayed-in-place polyurethane foam roofing systems.
GacoFlex S20 Series Coatings may also be used over concrete, coatings, and over plywood
decking when properly applied over an approved base coat; please contact Gaco Western for
specific recommendation.
When properly applied, the coating system provides a seamless weather-tight seal that protects the
substrate from degradation caused by ultraviolet light, water and other normal weathering hazards.
- 100% silicone solvent-free roof coating
- 50 Year limited Warranty when applied properly
- 1 coat on smooth surfaces. 2 coats on granulated and rough surfaces.
- Coverage: 67 square feet per gallon to achieve approximate 22 dry mils.
- Mixing: Mix before application to ensure uniform color and consistency.
- Thinning: Product should not be thinned.
- Primer: Existing silicone coatings should not be primed. On all other substrates, apply GacoFlex E5320 2-Part Epoxy Primer/Filler according to label directions.
- Dry Time: Final coat should be allowed to cure 24 to 48 hours, depending on temperature and humidity,
before suitable for light foot traffic.
- Clean Up: Clean application tools and equipment with 100% Pure Mineral Spirits Recirculate through lines
and gun until residual coating is removed. DO NOT USE WATER OR RECLAIMED SOLVENTS.
If you're thinking about replacing your aging roof, think again. Renew your weathered roof with GacoRoof. It can be applied to virtually any surface, including flat roofs, to create a seamless membrane that seals and protects against the elements.
► FREE SHIPPING¹
► NO SALES TAX ²
Questions? Please contact us at 1-800-941-1063 We are here to help!
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Technical Specs:
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Extended Information:
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.
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- On smooth surfaces, apply one coat at the rate of 1.5 gallons per 100 square feet to achieve
approximately 22 dry mils.
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- 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.
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- 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.
¹ Fuel Surcharge and any extended delivery charges still apply. Continental US only, restrictions may apply. Orders over $4,999 may require a bank wire transfer as payment, we will contact you.
² Call for taxable States
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Gaco Flex 2000 
