3M Scotchkote Encapsulation Coating Polynox 136 is a single component, water-based, anti-corrosive acrylic coating that offers superior elastomeric and adhesion properties as well as optimum levels of UV and corrosion resistance. It is simple, easy-to-use, and provides the ideal anti-corrosive encapsulation system for coated steelwork and concrete.
The New York State Bridge Authority, as part of its ongoing bridge refurbishment program, required a high performance encapsulation system that could be used to protect the previously painted steelwork as well as cable bundles, shrouds, and spider joints. 12,900 ft² of the Mid-Hudson Bridge were coated using 3M Scotchkote Encapsulation Coating Polynox 136.
Due to the effects of the environment and time, the railings located along this road section were suffering from heavy corrosion. A high performance refurbishment solution that would offer long-term corrosion protection was required.
The railings were abrasive blast cleaned to a minimum industry standard Sa2, ensuring all rust, millscale, and loosely adhered coatings were removed. The blasted surface was then treated with our anti-corrosive, surface tolerant epoxy 3M Scotchkote Epoxy Primer GP 120 prior to the application of 3M Scotchkote Urethane Coating UV 840. <3M Scotchkote Urethane Coating UV 840 is a two component polyurethane coating developed for the long-term protection of all types of structures including steel, aluminium, galvanized steel, brickwork, concrete, and GRP when used in conjunction with the appropriate 3M Scotchkote primer. It is totally unaffected by extreme levels of ultraviolet light and provides outstanding weather, chemical, and graffiti resistance.