Master Bond EP62-1AO is a two part epoxy adhesive and sealant with an exceptionally long working life of 12-14 hours at ambient temperature for a 100 gram mass. This makes it beneficial when bonding and sealing large or intricate parts that may need ample time for mixing and applying. This material has a high strength profile with a tensile modulus of 600,000 to 650,000 psi and a tensile strength of 5,000 to 6,000 psi. The service temperature range is -60°F to +450°F and it offers a glass transition temperature of 120-125°C.  

EP62-1AO is both electrically insulating and thermally conductive with a thermal conductivity value of 9-10 BTU•in/(ft2•hr•°F), or 1.30-1.44 W/(m·K). Its chemical resistance profile is robust, especially when compared to other thermally conductive epoxies. It can withstand a wide range of acids, bases and solvents. EP62-1AO has a low coefficient of thermal expansion of 18-21 x 10-6 in/in/°C.

The viscosity of the mixed compound is of a thixotropic paste consistency. There are several cure schedule options to choose from, all of which require a relatively low heat activation. Additional post curing for 2 to 4 hours at 200-300°F is recommended to obtain optimal performance properties. It is available in 30 cc syringe kits, 1/2 pint kits, pint kits, and quart kits. The color of Part A is off white and Part B is dark brown.

Master Bond Epoxy Sealants

Master Bond EP62-1AO is a thermally conductive, electrically insulative two part epoxy sealant with a long working life. This material can also be used as an adhesive since it offers a high tensile strength and tensile modulus. Read more about Master Bond’s industrial sealants at  or contact Tech Support. Phone: +1-201-343-8983 Fax: +1-201-343-2132 Email: