CoatingsPro Magazine

SEP 2016

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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COATINGSPRO SEPTEMBER 2016 47 e crew applied 5–6 mils (127.0–152.4 microns) of the primer, MasterTop SRS 41P. en, they applied 80–90 mils (2,032.0–2,286.0 microns) of MasterTop SRS 61BC with white, gray, and blue chips broadcast by hand to the point of rejection. Once the excess chips were vacuumed up, the crew followed the methyl methacrylate (MMA) coating with two layers of the seal coat, MasterTop SRS 71TC, at approximately 8 mils (203.2 microns) each. e second layer of 71TC also received an anti-skid additive for protection with these wet areas. "e total thickness of the system should be just a little over ⅛ th inch [3.2 mm]," McCoy explained. e installation advanced well. ey troweled on the basecoat and used a long roll technique for the thinner coats. "Normally with epoxies, we use a rubber squeegee, and it's poured over the whole floor and rolled," McCoy said. But 71TC was too thin for that. "is stuff is so fluid, the viscosity is thin, if you just dump it out and roll it, you're achieving a uniform finish." So they poured some of the material out around the room, let the applicator push it around to ensure full coverage, and then he went back in with a long roll from one side of the room to the other. at helped to get uniform thickness and avoid roller marks or puddles. One snag came with the installation, though. Georgetown colors, which were chosen in 1876, are blue and gray. e floor's colors were designed to match, but at one point, McCoy and Greenblatt thought that the coating was heading more toward purple. at would have been a violation for sure! " T he f irst room we d id, they d idn't have a cei ling in and only had t wo lights. T hat was the f irst mockup room that we d id. Look ing at the sample, the blue tur ned a dark pur ple," McCoy ex plained. Ever y where else, though, it looked blue. Because that "pur ple" f loor now looks blue, McCoy attr ibuted it to the cei lings (white versus none) and lights (incandes - cent versus LED, light emitting d iode). He thinks no cei ling and incandescent lights made ever y thing darker to create a pur ple look. Moving Violations W hile laying down the coatings, the crew used two fans from Tempest. at helped to keep the air moving in the smaller The crew then came in to roll out the topcoat to the rest of the floor surface area using larger equipment. On to the second of the two layers of the topcoat, the crew added anti-skid materials. Despite challenges with communicating with other trades, keeping the wet floors protected, and parking on the busy college site, the crew completed the job in two weeks. The topcoat was applied in two ~8-mil (203.2 microns) layers. Using small hand rollers, the crew first applied MasterTop SRS 71TC around all edges or corners of the floors throughout the room. The crew wore hard hats, goggles, gloves, and orange shirts at all times. They also wore ear plugs and respirators when grinding and knee pads or shoe spikes when hand rolling. Georgetown Athletic Facility

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