The compound bonds well to a variety of substrates including metals, composites, glass, ceramics, rubbers, and many plastics.
Master Bond EP21NS is a two-part epoxy that may be used for bonding, coating, sealing, and potting/encapsulating. It has a nanosilica filler that imparts dimensional stability and abrasion resistance. When measured according to ASTM D4060, standard test method for abrasion resistance, with CS-17 wheel for 1,000 cycles, EP21NS exhibits a low weight loss of 25 mg.
This formulation is a reliable electrical insulation with a volume resistivity greater than 1015 ohm-cm, a dielectric constant of 2.6 at 16.4 GHz, and a dielectric strength of 450 volts/mil at 75°F, for a 1/8-in.-thick specimen. It is serviceable over the temperature range of -80°F to +250°F.