Electronic Products & Technology

Outgassing rated epoxy enhances chemical resistance

May 13, 2020  Stephen Law

MASTER BOND EP42-2LV Black two-part epoxy provides low viscosity and good flow, and it withstands prolonged immersion in many acids, bases, solvents, fuels and oils. The versatile system can be used for bonding, sealing, coating and casting, where a strong chemical resistance profile is required. Compound has an easy to use mix ratio of 100 to 40 by weight or 100 to 50 by volume with Part A being black and Part B being light amber. The viscosity of the mixed system is around 1,000-2,000 cps, and it has a long working life of 60 to 90 minutes per 100-gram batch. Product cures optically opaque at room temperature in 2 to 3 days or at elevated temperatures of 200°F in 2 to 3 hours. For optimal performance, the recommended cure schedule is overnight at room temperature followed by heat curing at 150-200°F for 2 to 4 hours. Product meets NASA low outgassing specifications and is serviceable over a wide temperature range from -60°F to 350°F. 

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