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40 JANUARY 2017 COATINGSPROMAG.COM "We had to stop the leaking before we were able to put any liquids down," Winters said. Fortunately for the contractor, one of Dura's maintenance workers was on hand to head up to the roof and stop the leaks before the delay became too extensive. Nonetheless, the project was halted for at least two hours, Winters said — adding that his team had to work even harder to make up that time before the close of business that day. Three-Part System T he crew began their second day by patching the f loor as needed, using the coatings manufacturer's 1000FS mi x in tandem w ith the C A B - O -SIL TS-720 — a hydrophobic fumed silica — from Cabot Cor p. "A ll of the patching is done prior to putting the primer down," Winters said. "After we profile the floor and patch, then we' ll come back and regrind all of our patches to make sure that it transitions perfectly." Once patching was complete, Winters' crew started on the Protective Industrial Polymers' InhibiStat HB-Xtreme system. e nominal system thickness is 20 to 25 mils (508.0–635.0 microns), and when complete, it exhibits a satin finish and can be pigmented in many colors. Most importantly for an electron- ics site like Dura, it can dissipate a charge of up to 5,000 V to 0 V in under a tenth of a second. "is extreme wearing system is best suited for areas exposed to heav y wheel and foot traffic, such as aisle ways and warehouse areas requiring ESD protection," DeYoung said. e first step of the system was for the crew to apply Protect 1000 FS high-build, fast-curing primer. ey applied it to the prepared substrate, putting it down with a flat metal blade to achieve a desired dry film thickness (DFT) of 2 to 4 mils (50.8–101.6 microns) before allowing it to cure overnight. W hen they returned on day three — fortunately with no new rainfall — it was time to apply the body coat. Using a ¼-inch (6.4 mm) notched squeegee, the Protect 1000 HB coat was applied over several hours by the crew at a DFT of 14 to 16 mils (355.6–406.4 microns). Like the primer, the body coat was allowed to cure overnight. T he fourth and final day meant apply ing the topcoat. But before advancing to the finishing touches, the crew made sure to sand dow n all the coated f loors while using an 80 -grit sanding screen. Next, they vacuumed the f loor and used a f loor scrubber, Winters said, just to make sure that they had gotten off all of the fine dust. Before installing the topcoat, the crew also put down the copper stripping tape needed to ground the coating to the metal support beams of the building. e crew used one strip for each 1,000 square feet (92.9 m²). "W hen you use the copper tape, you have to go into a grounding point that actually physically touches and reaches the earth," Winters said. e crew then applied the Protect 200 ESD topcoat, which included DiamondWear (DW) — an additive used for abrasion and wear resistance. An 18-inch (45.7 cm) roller with a ⅜-inch (9.5 mm) cover was used to dip and roll to achieve the desired DFT of approximately 4 mils (101.6 microns). Winters noted ESD Floor Using an 80-grit sanding screen, the next step was to sand down the 1000 HB. They vacuumed up the fine dust before installing a copper strip every 1,000 square feet (92.9 m²). Using a ¼-inch (6.4 mm) notched squeegee, the crew applied Protective Industrial Polymers' 1000 HB at 14–16 mils (355.6–406.4 microns) DFT. They again left that layer to cure overnight. "When you use the copper tape, you have to go into a grounding point that actually physically touches and reaches the earth," said Jonathan Winters, president of Michigan Specialty Coatings.