One Component, B-Staged Epoxy for Potting, Sealing, Coating, and Bonding

Master Bond® EP36CLV is a unique one component, high performance epoxy for bonding, sealing, potting and coating featuring electrical insulation, high temperature resistance and exceptionally low viscosity. It varies appreciably from other heat resistant epoxies in that it has far more toughness and flexibility. Its forgiving nature at high temperatures imparts vastly superior thermal and mechanical shock resistance as well as superb thermal cycling ability when compared to more standard high temperature resistant epoxies. EP36CLV bonds well to a variety of substrates including metals, glass and many plastics. It has very good chemical resistance to water, acids, bases, fuels and oils. This one component system is primarily used for potting but can also be used for bonding and sealing. The service temperature range is -100 ºF to +500 ºF. Master Bond® EP36CLV offers the additional convenience of being a one component system together with flexible cure schedules.

EP36CLV has a unique chemistry which allows the product to be both tough and heat resistant without sacrificing mechanical, electrical, or thermal properties. For example at 212 ºF, EP36CLV has a Shore D hardness of 15-20 and yet maintains its integrity and dimensional stability. This lower hardness is indicative of its toughness and flexibility and translates into its enhanced ability to withstand rigorous thermal cycling. Most importantly, EP36CLV offers the lowest viscosity in its class. These properties-mechanical, thermal and electrical-are sustainable up to 500 ºF, and as a consequence, EP36CLV is particularly well suited for potting and encapsulation applications where electrical isolation and the ability to withstand severe thermal cycling over a wide temperature range are needed.

While EP36CLV is an unconventional epoxy, it is conveniently available in 22 gram preforms as well as pints and quarts. This system is formulated at elevated temperatures and poured into cans or 22 gram cookie molds and solidifies. Since it is a solid; it must be heated in a forced air or convection oven at 200 ºF for about 30 minutes to transform it to a liquid. The working life at this temperature is 60-75 minutes. To complete the cure, the temperature should be 350 ºF for 2-3 hours. When liquefied, it is easy to apply as an encapsulant or an adhesive. Liquefied but uncured material can be reused by allowing EP36CLV to resolidify at room temperature. Cured material cannot reliquefy; resolidified materials can become liquid again. This epoxy is amber in color. EP36CLV is a specialty system that is primarily used in electronic and aerospace applications.