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70 SEPTEMBER 2015 COATINGSPROMAG.COM epoxy and sand slurry to cover the topcoat and used about 200 gallons (757.1 L) of BASF Masterseal 350 to fll in all the rock pockets, Brenchley said. "Tat fattened everything out," he said. Ten the crew put down Polycoat's Polyprime 21 primer, a two-part epoxy primer, over the entire surface at about 4–7 mils (101.6–177.8 microns). "We did this in the late afternoon and allowed it to cure overnight," Brenchley said. Ten the crew changed the standard system of chasing the cracks with a two-component basecoat to a full basecoat application. Tey applied Polycoat 260 basecoat in one coat at approximately 40 mils (1,016.0 microns). "Tis is self-leveling, so it flled all the cracks and remaining pockets," Brenchley said. Te same day, the crew applied Poly-I-Gard 246SC with sand at a rate of about 10 pounds per 100 square feet (4.5 kg per 9.3 m²). "Tis was the most delicate part of the system, because it will of-gas if applied over 18-mils [457.2 microns] thick," Brenchley said. "With the original substrate having so many issues and irregularities, this was a challenge." Tey allowed the polyurethane coating to cure for a day, then added another sanded coat of the Poly-I-Gard 246SC in the drive lanes at a rate of about 10 pounds per 100 square feet (4.5 kg per 9.3 m²) and allowed it to cure. Tey followed that up with one last coat of the Poly-I-Gard 246SC over the entire garage foor at about 15 mils (381.0 microns). Te entire system had an average thickness of 70 dry mils (1,778.0 microns). Te crew used face masks as needed and set up large fans to keep air moving. Tey also worked into the wind. More Work Te job started in June 2015, and it was supposed to last two and a half weeks. But it ended up taking four weeks because of the additional work required. The final step was to apply another coat of Poly-I-Gard 246SC over the entire garage floor at about 15 mils (381.0 microns). In total, the system was an average of 70 dry mils (1,778.0 microns). Throughout the project, the crew wore face masks as needed and used fans to ventilate the area. They also worked around wind and tenants living in the buildings while the work was being done. The crew then applied a coat of Poly-I-Gard 246SC with sand at a rate of about 10 pounds per 100 square feet (4.5 kg per 9.3 m²) and then another coat in the drive lanes.