Highly flexible epoxy has outstanding adhesion to rubbers


Master Bond EP21TDC-7 is a new two component, room temperature curing epoxy adhesive/sealant/coating developed by Master Bond Inc., Hackensack, N.J. EP21TDC-7 bonds well to metals, glass, ceramics, plastics and many rubbers including neoprene, nitrile, SBR and natural rubber. It has a Shore D hardness of 30-35 and an elongation of 300%. EP21TDC-7 offers excellent thermal shock resistance and has a peel strength of >40 pli. It has a service operating temperature range of from -100°F to 250°F. Master Bond EP21TDC-7 spreads evenly and smoothly. It is 100% reactive and no solvents, diluents or volatiles are emitted during cure. Cures can be accelerated by exposure to heat. EP21TDC-7 has a mix ratio of 1 to 7 by weight. Particularly noteworthy is its ability to cure underwater.EP21TDC-7 offers superior electrical insulation properties and resistance to water, oil and many chemicals. It has a tensile strength of >1,000 psi and a volume resistivity of >1012 ohm-cm. Additionally it will adhere to rubber surfaces without time consuming surface preparation.
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