EP21ARHT Product Description

Master Bond Polymer System EP21ARHT is a two component epoxy resin compound for durable, high performance, high strength coatings, liners and adhesive/sealants with outstanding acid and overall chemical resistance. The EP21ARHT compound is formulated to cure at room temperature or more rapidly at elevated temperatures, with a convenient two-to-one non-critical mix ratio by weight and offers a degree of acid resistance unmatched by any other currently available room temperature or heat curing resin composition. It can successfully withstand, for example, prolonged immersion in even 96-98% sulfuric acid and 20% hydrochloric acid for more than a year. A primary application for its use would be a coating and/or liner for chemical storage tanks, fuel storage tanks, chemical piping, scrubbers, chemical processing equipment, etc. Master Bond Polymer System EP21ARHT also features excellent resistance to fuels, oils, ethanol and many active organic solvents. In addition, it has superb bonding strength and is an excellent adhesive especially in acid environments.

Master Bond Polymer System EP21ARHT is 100% reactive, does not contain any solvents or diluents and cures with minimal shrinkage. It readily develops a high bonding strength of more than 2500 psi when fully cured. Adhesion to metals, glass, ceramics, and many plastics is excellent. A non-drip version called EP21ARHTND is also available. The EP21ARHT system has high physical strength properties and although rigid, it can thermally cycle over the wide temperature range -60 to +400°F.

The Master Bond Polymer System EP21ARHT has superior electrical insulation properties and a low coefficient of thermal expansion. The color of part A is clear, while part B is amber. This epoxy compound is widely used in the chemical processing industry, metalworking, electronic, and electrical industries as well as other industries where a high performance coating, sealant or adhesive with outstanding chemical resistance, especially to acids, is required. The best chemical resistance is obtained when heat is added to the curing process. An example of a good cure schedule would be a few hours at room temperature followed by 2-3 hours at 150-200°F.