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Revised: May 6, 2013 <br />MACROPOXY® 646-100 <br />FAST CURE EPOXY <br /> PART A B58-620 SERIES PART B B58V620 HARDENER <br />Protective <br />& <br />Marine <br />Coatings <br />4.52 <br />www.sherwin-williams.com/protective <br />PRODUCT DESCRIPTION <br />MACROPOXY 646-100 FAST CURE EPOXY is a high solids, less than 100 g/L VOC, 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 <br />marginally prepared steel surfaces. <br />• Low VOC,<100 g/L • Chemical resistant <br />• Low odor • Abrasion resistant <br />• Outstanding application properties <br />PRODUCT CHARACTERISTICS <br />Finish: Semi-Gloss <br />Color: Mill White and a wide range of colors available through tinting <br />Volume Solids: 73% ± 2%, mixed Mill WhiteWeight Solids: 83% ± 2%, mixed Mill WhiteVOC (EPA Method 24): Unreduced: <100 g/L; .83 lb/gal <br /> mixed Reduced 10%: <100 g/L; .83 lb/gal <br />Mix Ratio: 1:1 by volume <br />Recommended Spreading Rate per coat: <br />Minimum Maximum <br />Wet mils (microns)7.0 (175)13.5 (338) <br />Dry mils (microns)5.0*(125)10.0*(250)* <br />~Coverage sq ft/gal (m2/L)116 (2.8)232 (5.7) <br />Theoretical coverage sq ft/gal <br />(m2/L) @ 1 mil / 25 microns dft 1168 (28.6) <br />NOTE: Brush or roll application may require multiple coats to <br />achieve maximum fi lm thickness and uniformity of appearance. <br />*See Recommended Systems on reverse side. See Performance <br />Tips section also. <br />Drying Schedule @ 7.0 mils wet (175 microns): <br />@ 40°F/4.5°C @ 77°F/25°C @ 100°F/38°C <br />50% RH <br />To touch:4-5 hours 2 hours 1.5 hours <br />To handle:48 hours 8 hours 4.5 hours <br />To recoat: <br />minimum:48 hours 8 hours 4.5 hours <br />maximum:1 year 1 year 1 year <br />Cure for <br />service:10 days 7 days 4 days <br />immersion:14 days 7 days 4 days <br />If maximum recoat time is exceeded, abrade surface before recoating. <br />Drying time is temperature, humidity, and fi lm thickness dependent. <br />Pot Life:10 hours 4 hours 2 hours <br />Sweat-in-time:30 minutes 30 minutes 15 minutes <br />Shelf Life:36 months, unopened <br />Store indoors at 40°F (4.5°C) <br />to 100°F (38°C). <br />Flash Point: 61°F (16°C), PMCC, mixed <br />Reducer/Clean Up:Reducer R7K111 or Oxsol 100 <br /> <br />continued on back <br />RECOMMENDED USES <br />• Marine applications <br />• Fabrication shops • Refi neries <br />• Pulp and paper mills • Chemical plants <br />• Power plants • Tank exteriors <br />• Offshore platforms • Water treatment plants <br />• Mill White is acceptable for immersion use for salt water and <br /> fresh water <br />• Not acceptable for potable water <br />• Suitable for use in USDA inspected facilities <br />• Conforms to AWWA D102 OCS #5 <br />• Approved with FIRETEX hydrocarbon coatings <br />PERFORMANCE CHARACTERISTICS <br />Substrate*: Steel <br />Surface Preparation*: SSPC-SP10/NACE 2 <br />System Tested*: <br />1 ct. Macropoxy 646-100 Fast Cure @ 6.0 mils (150 microns) dft <br />*unless otherwise noted below <br />Test Name Test Method Results <br />Abrasion <br />Resistance <br />ASTM D4060, CS17 <br />wheel, 1000 cycles, <br />1 kg load <br />84 mg loss <br />Accelerated <br />Weathering - QUV1 <br />ASTM D4587, <br />QUV-A, 12,000 <br />hours <br />Passes <br />Adhesion ASTM D4541 1,037 psi <br />Corrosion <br />Weathering1 <br />ASTM D5894, 36 <br />cycles, 12,000 hours <br />Rating 10 per ASTM <br />D714 for blistering; <br />Rating 9 per ASTM <br />D610 for rusting <br />Direct Impact <br />Resistance ASTM D2794 30 in. lb. <br />Dry Heat Resistance ASTM D2485 250°F (121°C) <br />Exterior Durability 1 year at 45° South Excellent, chalks <br />Flexibility ASTM D522, 180° <br />blend, 3/4" mandrel Passes <br />Immersion 1 year fresh and salt <br />water <br />Passes, no rusting, <br />blistering, or loss of <br />adhesion <br />Pencil Hardness ASTM D3363 3H <br />Salt Fog Resistance1 ASTM B117, 6,500 <br />hours <br />Rating 10 per ASTM <br />D610 for rusting; <br />Rating 9 per ASTM <br />D1654 for corrosion <br />Water Vapor <br />Permeance <br />ASTM D1653, <br />Method B 1.16 grains/day <br />Epoxy coatings may darken or discolor following application and curing. <br />Footnotes: <br />1 Zinc Clad II Plus Primer