CoatingsPro Magazine

JAN 2019

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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58 JANUARY 2019 COATINGSPROMAG.COM e perimeter edges and other repaired locations were sprayed with a coat of GacoFlex SF2022 SeamSeal, a silicone- based, solvent-free sealant. is silicone sealant was applied using Hennes/Johnson airless hybrid coating pumps. GacoFlex SF2022 adheres to seams, fasteners, and other roof details, trans- forming the roof into a seamless foundation for the application of the GacoFlex S2029 waterproof, elastomeric silicone coating. Heisler pointed out that there was one step that occurred at the very beginning of the process: "After the materials were replaced and repaired, but prior to installing any caulk or sealant, we laid down a thin coat of GacoFlex E5320 on the perimeter edges and on all areas where we removed and repaired the insulation board," said Heisler. GacoFlex E5320 is a two-component, water-borne epoxy primer that is ideal for use on most roofing surfaces, including metal roofs and flashings. is easy-to-apply primer bonds to properly prepared roofing surfaces and improves adhesion of GacoFlex silicone coatings and other topcoats, especially on weathered surfaces. e primer was applied with a Graco GH 300 pump. Speedy Seal After the repair process was completed, the Spray-Tec crew applied the GacoFlex E5320 primer to the entire roof. According to Heisler, the primer was applied at various mil thicknesses, depending on the specific area of the roof. At this point, the crew went all over the roof, looking at every detail. ey applied more Dow Corning caulk and GacoFlex SF2022 where necessary, especially around rooftop units, drains, and penetrations. "It was a painstaking process, but it was well worth it. By doing this intense detail work, we sealed in the roof before even applying a coating. e owners of the track were thrilled that the remodel of the suites below was able to begin right on schedule. is wouldn't have been possible if we didn't pay so much attention to detail," explained Heisler. After the time-consuming detail work, the crew was then ready to spray the entire roof with GacoFlex S2029. is silicone coating system provides a seamless, weather-tight seal that protects the substrate from degradation caused by UV rays, water, and other normal weathering hazards. e crew applied two coats of GacoFlex S2029 on the roof at an average thickness of 25 wet mils (635.0 microns) per coat. "e topcoat was a darker gray in color, and we broadcast black 3M granules into the coating. Unlike most roofs installed today, we didn't want any reflectivity. is is because of the aerial coverage of the Quaker State 400. e result was a beautiful roof that matches the racetrack. We basically gave the roof a 'racetrack ' look," said Heisler. High Above the Speedway As with any coating job occurring on a roof, fall protection was the number one priority for Heisler and his team. "ere were a lot of edge details, and with the roof being 20- to 25-feet [6.1–7.6 m] high, we had to be 100 percent tied off a good portion of the time. We used both warning lines and 100 percent tie off [Guardian harnesses and retractable lanyards] Gaco Western E5320 primer was applied to the entire roof, including the edges and areas where insulation was replaced. Repaired areas also received silicone caulk and sealant. Once the edges were tended to, the crew power washed the roof. Since the work was done at heights, they had to wear fall protection. Other safety gear included gloves and safety glasses. The topcoat, in gray, was applied in two coats and the final coat received 3M granules. During spray applications, the crew wore respirators from 3M, too. Roof Renovation

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