Thermally Conductive, Chemically Resistant Epoxy Sealant
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.
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, ½-pint kits, pint kits, and quart kits. The color of Part A is off-white and Part B is dark brown.