Toughened epoxy system EP21FL has a 4 to 1 mix ratio by weight and cures at ambient temperature. It has a low mixed viscosity of 2,000-4,500 cps. EP21FL has excellent electrical insulation properties and a working life of 7-8 hours for a 100 gram mass at 75°F. It has a volume resistivity of > 1014 ohm cm and a dielectric constant of 3.6 at 60 Hz. EP21FL has a low exotherm when curing and is ideal for potting and encapsulation.
This system withstands rigorous thermal cycling and mechanical vibration. It is resistant to many chemicals and has superior durability. Shore D hardness is 35-45. Service operating temperature range is -100°F to +250°F. Bond strength to similar and dissimilar substrates is excellent.
Master Bond EP21FL is 100% reactive and does not contain any solvents. It is available for use in ½ pint, pint, quart, gallon and 5 gallon container kits. Shelf life for this compound is 6 months in original unopened containers at 75°F.
Specially Formulated Potting and Encapsulation Compounds
Master Bond advanced epoxy potting and encapsulation formulations resist exposure to hostile environmental conditions. Specific grades are cryogenically serviceable, have enhanced thermal conductivity, thermal stability, flame resistance, and low coefficients of thermal expansion. Additionally, products are NASA low outgassing approved, USP Class VI certified and meet FDA 175.300 food grade requirements.
Cutting Edge Formulations
Master Bond's product line consists of advanced epoxies, silicones, polyurethanes, polysulfides, UV/LED cures and other specialty systems. Each compound is designed to meet specific application requirements. Master Bond's environmentally friendly systems are available in convenient packaging from small to large sizes.
Outstanding Technical Support
With years of experience in technical support, the Master Bond team will be able to assess your application and recommend the most suitable polymer system to meet your specifications. Master Bond will continue to guide you throughout the design, prototype and manufacturing process. Master Bond offers replacements for discontinued products.
Latest Technological Advancements
As a worldwide manufacturer of polymer compounds, Master Bond is continuously working with universities and R&D labs to improve product performance. Master Bond products are designed to maximize productivity, reduce waste, save energy and for dependable, long-term durability.
This information has been sourced, reviewed and adapted from materials provided by Master Bond Inc.
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