Installation Guide

Silicone Roof Coating
APPLICATION INSTRUCTONS
SURFACE PREPARATION
It is extremely important to get the roof clean and dry. First remove heavy deposits of dirt, leaves and other debris from the roof
using broom or air broomer, then inspect the entire roof surface and flashings for any open seams, tears, cuts, etc. Repair these flaws so
water is not blown in under membrane during the cleaning process. Pressure wash roof with water and allow to dry completely.
For general cleaning, apply GacoWash Concentrated Cleaner according to label instructions. On all single ply membrane roofs, after
application of cleaner, power scrub the roof surface until clean and then power wash to remove debris and continue rinsing until all suds
are gone.
Biological Control: Areas of algae, mildew or fungus on the roof membrane or the existing coating should be treated with a solution of
1 part household bleach and 3 parts water, followed by a power washer rinse using clear water.
Drying: After cleaning and rinsing the roof, ensure no dirt or debris is present. Allow surfaces to thoroughly dry to prevent blistering.
Examine roof, paying particular attention to areas of physical damage to determine that residual water has in fact dried before applying
coating.
Note: Drying time depends on weather conditions such as temperature, humidity and air movement.
PRIMER
GacoElastomeric will adhere to most surfaces without a primer; however, some substrates may require a primer for optimal adhesion. To
verify proper adhesion, an adhesion test should be performed on a properly prepared and representative area of the substrate that is to be
coated. On any aged asphalt or black tar surfaces, applying GacoFlex E5320 2-Part Epoxy Primer, according to label directions, may help
prevent bleed-through staining on the final coats.
APPLICATION INSTRUCTIONS
Mix before application to ensure uniform color and consistency. Product should not be thinned. The coverage rate of GacoElastomeric is two
gallons per 100 sq. ft. or 1 square. Two coats are recommended for sufficient waterproofing coverage on most substrates. Apply at a rate of
100 sq. ft. per gallon in each coat on a smooth surface; coverage rate may decrease on heavily textured or weathered substrates. Allow the
first coat to dry for 3 to 12 hours. Apply second coat as soon as the first coat can be safely walked on. Do not apply in temperatures below
freezing, above 120°F (49°C) or if rain is expected within 2 hours. Light foot traffic is allowed for equipment servicing only.
Flat roofs (less than 1:12 pitch/5°): Use a solvent-resistant ¾” or 1” nap roller cover and dip roller directly into pail and apply, or pour
product onto flat roof surface and roll out evenly.
Pitched roofs (greater than 1:12 pitch/5°): Use extreme caution when on a pitched roof. Follow all safety guidelines to avoid injury.
Use a solvent-resistant ¾” or 1” nap roller cover, dip roller directly into pail, and apply. A roof pitch greater than 4:12/19° is not considered
walkable; Additional reach equipment may be needed to properly apply the product safely and effectively.
CLEAN UP & MAINTENANCE
Application tools and equipment can be cleaned with GacoFlex Silicone Solvent or 100% Pure Mineral Spirits. DO NOT USE WATER OR
RECLAIMED SOLVENTS. Once a container of GacoElastomeric is opened, the curing process has started. Use the entire product on your
project if possible. Allow any remaining product in the container to solidify and dispose of in the proper manner. Roof structures may settle
over time. A periodic inspection of your roof, which includes transition areas, flashing, vents and skylights, is recommended. Keep drains
cleared at all times. Roofs become slippery when wet. Use extreme caution. Do not recoat GacoElastomeric with acrylic, urethane or Hypalon
®
coatings.
CAUTION
An old, neglected, or failing roof does not have the resilience to withstand the rigors of weather. GacoElastomeric may not be suitable for
such a roof. If you are in doubt about the condition of your roof, consult a qualified roof inspector.