Use and Care Guide

S20 Series
Page 3
Made in the USA • gaco.com • 800.331.0196
For specific Safety and Health information please refer to Safety Data Sheet.
FLASH POINT:
ASTM D3278
178°F (81°C)
STORAGE
STABILITY:
Two years from date of manufacture when stored in sealed containers between 0°F - 80°F
(-17°C - 26°C).
APPLICATION
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.
PRIMER:
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 ¾" 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.
CLEAN UP:
Clean application tools and equipment with GacoFlex Silicone Solvent. Recirculate through lines
and gun until residual coating is removed. DO NOT USE WATER OR RECLAIMED SOLVENTS.