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44 MARCH 2016 COATINGSPROMAG.COM graduates of VersaFlex's Polyurea University; they had experi- ence with the VersaFlex products specifed for this project: FV 20 primer, FSS 45 polyurea, and GelFlex 1115 topcoat. And they had a powerful Graco Reactor 2 HXP3 hydraulic proportioning system on standby. Singleton felt confdent — and rightly so. But the project manager had no inkling that factors beyond his control on this project would nearly push the entire Water FX crew right of the deep end! Tread Water and Wait Lady luck smiled on Water FX by providing great jobsite access via an empty lot on the north side of the hotel. T his allowed them to set up shop in a spray rig trailer that held the H XP3, 400 feet (121.9 m) of heated hose, and other gear. Eager to begin, the crew dove into action and erected overspray barriers along the fountain perimeter and at the base of the Statue of Liberty. No sense getting this lady's toes wet w ith overspray! Singleton checked the shotcrete moisture level several times a day with his GE Protimeter moisture meter. Twenty-two days after the pour, the concrete dried to 5 percent moisture content, the maximum specifed. Te Water FX crew wanted to start prepping immediately, but those hopes were dashed when they learned that the entire polyurea application had to be pushed back three weeks to accommodate changes in the sched- ule. Despite that the new start date seemed perilously close to their cast-in-stone fnish date, there was nothing the crew could do but tread water and wait. "We're always under pressure to meet a schedule, and this job started out like many," said Singleton. "We' ll review designs, attend preproduction coordination meetings, and get initial start dates. Somehow, the start dates always seem to get pushed back — but the fnish dates remain the same. It's just part of the business we're in." Enormous Belly Flop Tree weeks later, the crew returned to the jobsite, freshened up the overspray barriers, and trowel-applied Sikafex caulking to cover shotcrete imperfections larger than approximately 1-inch (0.3 cm). Liquid-applied polyurea covers smaller faws, said Singleton. But while the crew made ready for primer application, disturbing weather news began to pour in. A massive storm had just hit the Los Angeles, Calif., coast and was moving their way! Las Vegas forecasters predicted heav y rain within three days. Pushing the start date back again to wait for the storm to pass meant missing the deadline. Could the crew squeeze three-and- a-half days' work into two and a half days? Or would Water FX's frst attempt at a large, high-profle polyurea project amount to an enormous belly fop? Water FX took the plunge and mi xed their first 10 -gallon (37.9 L) kit of VersaFlex VF 20 primer. T he crew could ill afford to waste even one hour for any puddled primer to cure, so they dipped into their bag of tricks. Experience had taught them that rolling or brushing VF 20 tended to leave areas of ponding that cured slowly. To work around this, the crew used a Graco Magnum X7 airless sprayer to apply a thin coat of VF 20 and back rolled the still-wet primer w ith thin-matte rollers to Wielding a Probler P2 spray gun for the first time, the crew from Water FX started the polyurea system with a mist coat of primer. That was VF 20, which was then backrolled. When the lagoon at the New York-New York Hotel & Casino in Las Vegas started leaking, the owners decided to demo it and start over. That included a 9,600-square-foot (891.9 m²) caulk and coating job. The workhorse was the second layer, which was applied in a single layer at approximately 60 mils (1,524.0 microns) dry film thickness (DFT). The crew used coating thickness detectors to confirm the thickness throughout. Las Vegas Polyurea