Master Bond EP40TC is a two-part epoxy system, designed for bonding, sealing and encapsulating applications where thermal conductivity and electrical insulation are required. With a high thermal conductivity value of 8-11BTU/in (ft2 /hr/°F) [1.16-1.60W/(m/K)], it is formulated with a small particle size filler, making it ideal for filling small cavities and applying the product in thin sections. Its volume resistivity is greater than 1015 ohm-cm.
“EP40TC’s key distinguishing factor is that there is no compromise on the bond strength while providing excellent elongation and toughness. It has a high strength profile with a tensile lap shear strength of 2,300psi-2,500psi, an elongation of 60%-70%, and a tensile modulus of 5,000psi-15,000psi,” says Rohit Ramnath, Senior Product Engineer. “Also, it meets NASA low outgassing specifications which is a prerequisite for many aerospace, electronic and optical applications.”
Serviceable from -100°F to +300°F, this toughened system resists thermal cycling, vibration and shock. EP40TC exhibits a high peel strength of 40pli-60pli and Shore D hardness of 70-80 at 75°F. It features a convenient 1:1 mix ratio, and cures in two to three days at room temperature or faster with the addition of heat. This compound adheres well to a variety of substrates, such as metals, composites, glass and many plastics. EP40TC is available in standard packaging, as well as premixed and frozen syringes.
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