NSF-Approved Coatings suit potable water applications.
Press Release Summary:
Macropoxy® 646 NSF Fast Cure Epoxy is a fast-drying polyamide epoxy for steel and concrete structures. At 77°F and 50% relative humidity, it dries to touch in 2 hrs. Macropoxy® 846 NSF Winter Grade Epoxy is a fast-drying polyamide epoxy for industrial application maintenance and can be applied at temperatures as low as 35°F. It cures to touch in 4-5 hrs at 40°F, 50% relative humidity. Both are high solids, VOC compliant, and suitable for marginally prepared substrates.
Original Press Release:
Sherwin-Williams NSF-Approved Macropoxy® Coatings Excellent for Marginally Prepared Substrates
Sherwin-Williams offers broad line of NSF-approved coatings for potable water applications
(ANAHEIM - June 15, 2003) - Two NSF-approved coatings from Sherwin-Williams Industrial & Marine Coatings group - Macropoxy® 646 NSF Fast Cure Epoxy and Macropoxy® 846 NSF Winter Grade Epoxy - are part of a growing list of products from Sherwin-Williams formulated to meet the toxicological and extraction test requirements of ANSI/NSF Standard 61.
Macropoxy® 646 NSF Fast Cure Epoxy is a fast-drying polyamide epoxy for steel and concrete structures, while Macropoxy® 846 NSF Winter Grade Epoxy is a fast-drying polyamide epoxy for industrial application maintenance can be applied at temperatures as low as 35° F. Both coatings are high solids and VOC compliant. Macropoxy 646 NSF is formulated to meet exacting specifications. Created with low molecular weight polymers and co-reactants, the coating is able to form a dense, chemical and corrosion resistant finish. Its high crosslink density ensures superior protection, even at sharp edges, corners and welds.
The coating has exceptional wetting properties for strong adhesion and rapid penetration into rusted crevices. At 77° F and 50% relative humidity, the product dries to the touch in 2 hours and can be recoated in only 8 hours when applied at the specified 7 mils wet film thickness. Macropoxy 846 NSF has a very similar chemistry and exhibits many of the same application and performance characteristics as Macropoxy 646 NSF. The main difference is curing time. At the specified 7 mils wet film thickness, Macropoxy 646 NSF cures to the touch in 4 to 5 hours at 40° F, 50% relative humidity. At the specified 6 mils wet film thickness Macropoxy 846 NSF cures to the touch in just 1 hour at 40° F, 50% relative humidity. In addition to faster drying times, the two new Macropoxy coatings offer a number of application benefits. The products can be brushed, rolled, or spray applied due to their unique chemical compositions. Both exhibit good flow and leveling characteristics. They are ideal for use in the water and wastewater treatment industries or for other facilities with complex infrastructures and aggressively corrosive environments.
Sherwin-Williams NSF-approved coatings also include Tank Clad HS, High Solids Catalyzed Epoxy, Copoxy Shop Prime, Dura-Plate 235® and Dura-Plateg UHS. All the coatings are NSF-approved for use in potable water storage tanks 1,000 gallons and larger.
Sherwin-Williams Industrial and Marine Coatings group serves North America with a broad line of high-performance coatings, comprehensive technical service, and the industry's largest distribution network. Relying on more than 135 years of experience in formulating industrial coatings, the group provides cost-effective solutions for applications where extreme corrosion, abrasion and chemical attack are present.
Visit Sherwin-Williams on the World Wide Web at www.sherwin-williams.com or to have a representative contact you, call 1-800-524-5979.
