Master Bond (Hackensack, NJ) EP21ARHTND-2 is a two part epoxy adhesive, designed to withstand prolonged exposure to a wide range of chemicals. According to the company, the system’s chemical resistance was successfully tested in chemicals such as 98% sulfuric acid, 25% hydrochloric acid, 20% phosphoric acid, and 15% nitric acid, by soaking cured samples for more than 12 months. The product also passes the damp heat reliability testing by withstanding 1000 hours of 85°C and 85% Relative Humidity (RH).”
Although EP21ARHTND-2 is capable of curing at room temperature, to optimize its acid resistance properties, a cure schedule of overnight at ambient temperatures, followed by a heat cure of 150-200°F for 2-4 hours or longer is typically recommended. It is a reliable electrical insulator with a volume resistivity greater than 1014 ohm-cm at 75°F, and dielectric strength of 440 volts/mil at 75°F for a 1/8-inch test specimen. Other noteworthy properties include a tensile strength of 9,000-10,000 psi, and a Shore D hardness of 75-85. The adhesive provides good heat resistance and is serviceable from -60°F to +400°F.
EP21ARHTND-2 does not contain solvents and is RoHS compliant.
