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Case Studies

GacoFlex S20 Silicone Over Metal Roof Restoration – Cherokee Building Materials (OK)

Case History GacoFlex S20 Metal Restored Cherokee Building Materials OKC OK Photo1


Cherokee Building Materials of Oklahoma City supplies drywall and metal studding to commercial builders. Their facility is a metal building that is approximately 30 years old. While the building has served them well, in recent years numerous leaks have developed in the metal roof.


Coontz Roofing Inc., an Oklahoma roofing contractor since 1978, suggested using the GacoFlex S20 Silicone Roof Coating System over the entire 28,200 square foot roof area. Because the leaks seemed to originate from the screws and metal seams, repairs could easily be made to the existing metal roof deck before the coating was applied.

Unique Characteristics:

Applying the GacoFlex S20 Silicone Roof Coating System presented several challenges. Due to limited parking area around the facility, both employee and customer vehicles were parked near the building. Customer pickups and deliveries of new materials created a constant stream of vehicles coming and going all day. Application was coordinated daily with the yard supervisor to lesson any disruption of business activity. On windy days, to avoid the possibility of overspray on vehicles, the application was done after 5pm closing time and on weekends.


Once the roof area was cleaned with GacoWash Concentrated Cleaner and thoroughly power washed and allowed to dry completely, the entire roof received a coat of GacoFlex E5320 2-Part Epoxy Primer/Filler which was then allowed to dry. All fasteners, vertical and horizontal seams, skylight perimeters and other roof openings were sealed with GacoFlex SF2000 SeamSeal Solvent-Free Silicone Sealant to make these areas watertight. Much of the prep work to fasteners and seams had to be done by hand using brushes and rollers.

Once the entire roof was prepped, GacoFlex S20 Solvent-Free 100% Silicone Coating was applied over the entire roof area using a Gaco modified Graco X70 Airless Sprayer with a 300 foot hose to reach across roof expanses.

The facility manager was pleased with how quickly the process was completed and how little disruption there was to their daily business. A few days after completion, the area experienced a heavy rain – the building’s general manager commented that it was the first time in years that they did not experience a single leak in the entire facility.

Location: Oklahoma City, OK
Specification: RC-30-GF20
Product Type: Metal Roof Restoration
Contractor: Coontz Roofing, Inc.
Problem Solved: Metal roof had developed many leaks.
Customer: Cherokee Building Materials of OKC, Inc.