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Protective & Marine Coatings PRODUCT DATA SHEET Finish: Semi-Gloss Colors: of colors available through tinting Mill White, Black and a wide range 72% ± 2%, mixed, Mill White Volume Solids: VOC (mixed): <250 g/L: 2.08 lb/gal Mix Ratio: 1:1 by volume Typical Thickness: Recommended Spreading Rate per coat: Minimum Maximum Wet mils (microns) Dry mils (microns) —Coverage sq ft/gal (m2 /L) Theoretical coverage sq ft/gal (m2 /L) @ 1 mil / 25 microns dft 7.0 (175) 5.0* (125) 115 (2.9) 1152 (28.2) 13.5 (338) 10.0 (250) 230 (5.8) *May be applied at 3.0-10.0 mils (75-250 microns) dft as an intermediate in a multicoat system. NOTE: Brush or roll application may require multiple coats to achieve maximum film thickness and uniformity of appearance. 36 months, unopened Store indoors at 40°F (4.5°C) to 110°F (43°C) 91°F (33°C), TCC, mixed Shelf Life: Flash Point: Reducer/Clean Up':VOC Restricted Areas (<250 g/L): use Reducer #111 or Oxsol 100 Weight: 12.9 ± 0.2 lb/gal :1.55 Kg/L, mixed, may vary by color 'Other areas (<340 g/L): use Reducer#111, Oxsol 100, Reducer#15, Reducer #58. or MEK up to 10%. Choose a reducer that is compliant in your area. Confirm compliance v‘iith state and local air quality rules before use. Average Drying Times @ 7.0 mils (175 microns) wet: 35'F (1.7'C) 50% RH Touch: 4-5 hours Handle: 48 hours Recoat: minimum: 48 hours maximum: 1 year Cure to service: atmospheric: 10 days immersion: 14 days 77 F (25 C) 50% RH 2 hours 8 hours 8 hours 1 year 7 days 7 days 100'F (38C) 50% RH 1.5 hours 4.5 hours 4.5 hours 1 year 4 days 4 days Average Drying Times as intermediate @ 5.0 mils (125 microns) wet: Touch: 3 hours 1 hour 1 hour Handle: 48 hours 4 hours 2 hours Recoat: minimum: 16 hours 4 hours 2 hours maximum: 1 year 1 year 1 year If maximum recoat time is exceeded, abrade surface before recoating. Drying time is temperature, humidity and film thickness dependent. Paint temperature must be 40°F (4.5°C) minimum. Pot Life: 10 hours 4 hours 2 hours Sweat-in-time: 30 minutes 30 minutes 15 minutes MACROPDXY® 646 FAST CURE EPDXY MASTIC Revised July 24. 2023 PRODUCT DESCRIPTION MACROPDXY 646 Fast Cure Epoxy Mastic is a high solids, high build, fast drying, polyamide epoxy designed to protect steel and concrete in industrial exposures. Ideal for maintenance painting and fabrication shop applications. The high solids content ensures adequate protection of sharp edges, corners, and welds. This product can be applied directly to marginally prepared steel surfaces. INTENDED USES Recommended for marine applications, refineries, offshore platforms, fabrication shops, chemical plants, tank exteriors, power plants, water treatment plants, and mining and minerals industry Factory ground formulas are available for subsea/immersion service. For a full list of shades please consult Sherwin-Williams PRODUCT DATA SURFACE PREPARATION Surface must be clean, dry, and in sound condition. Remove all oil, dust, grease, dirt, loose rust, and other foreign material to ensure adequate adhesion. Minimum recommended surface preparation: Iron & Steel: Atmospheric: SSPC-SP2/3/ 1508501-1:2007 St 2 or SSPC-SP WJ-3 / NACE WJ-3L Immersion: SSPC-SP10 / NACE 2/ IS08501-1:2007 Sa 2.5, 2-3 mil (50-75 micron) profile or SSPC-SP WJ-2/NACE WJ-2L Stainless Steel: Atmospheric: SSPC-SP16, 1 mil (25 micron) profile Aluminum & Galvanizing: Concrete & Masonry: Ductile Iron Pipe: SSPC-SP1. If surface has not be weathered for more than 6 months, follow SSPC-SP1 then SSPC-Sp16. For fire proofing projects, consult a Sherwin-Williams representative for surface preparation requirements. Atmospheric: SSPC-SP13/NACE 6, or ICRI No. 310.2R CSP 1-3 Immersion: SSPC-SP13/NACE 6-4.3.1 Atmospheric: NAPF 500-03-03 Power Tool Cleaning Buried & Immersion: NAPF 500-03-04 Abrasive Blast Cleaning Cast Ductile Iron Fittings: NAPF 500-03-05 Abrasive Blast Cleaning Ref 1101-1 wwwsherwin-wiiiiams.com/protective Page 1 of 2