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    Products

    Master Bond Launches EP21AR, two-component epoxy

    04.05.11
    For applications demanding exceptional chemical resistance, especially to acids, fuels and oils, Master Bond has developed EP21AR. Whether coating, lining, bonding or sealing, this two-component epoxy can withstand harsh, acidic environments, including prolonged immersion in 96-98 percent sulfuric acid and 36 percent hydrochloric acid for over a year, the company said. With a dielectric strength of 400 volts/mil, EP21AR is a durable and stable epoxy that is also a superb electrical insulator. Its coefficient of thermal expansion is 45-55 ppm/°C, and it is serviceable from -60°F to +275°F. It produces high strength, abrasion resistant bonds with a tensile strength over 10,000 psi, a shear strength exceeding 2,700 psi, and a compressive strength greater than 14,000 psi at 75°F.

    EP21AR is easy to use with a forgiving two to one mix ratio by weight, and a mixed viscosity of 10,000-15,000 cps. It is 100 percent reactive with no solvents or diluents and can be applied smoothly in any thickness. This epoxy has a working life of 45 to 55 minutes at ambient temperature for a 200-gram batch, and cures at room temperature or faster at elevated temperatures. It bonds well to a wide variety of substrates, including metals, glass, ceramics, cements, vulcanized rubbers, wood and many plastics.

    EP21AR is packaged in pint, quart, gallon and five-gallon container kits. It is widely used in an array of industries, including oil and chemical processing, maintenance and repair, optics, metalworking, appliance, and electrical/electronic.

    Master Bond EP21AR is ideal for applications that require high strength, electrically insulative bonds in an acidic or corrosive environment.
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