Key Features
- One-to-one mix ratio
- Tough, flexible bonds
- Withstands thermal cycling
- Room temperature curing
- Chemical resistance to fuels, oils, hydrocarbons and hydraulic fluids
- Fully complies with RoHS regulations
Master Bond EP21TP-2NV is a two-component epoxy polysulfide system formulated to cure at room temperature or more rapidly at elevated temperatures, with a one-to-one mix ratio by weight or volume. It’s a versatile material that can be used as an adhesive, coating, encapsulant, and especially as a sealant. It resists a wide array of chemicals including water, gasoline, fuels, oils, hydrocarbons, hydraulic fluids, and many acids and bases. Significantly, unlike many chemical-resistant epoxy-based materials, this system has excellent toughness. These properties enable EP21TP-2NV to withstand rigorous thermal cycling as well as mechanical and thermal shocks.
The cured system has excellent electrical insulation properties. Its service temperature range is -80°F to +250°F. One unusual feature of EP21TP-2NV is the influence of adding heat to the curing cycle. When cured at room temperature the Shore D hardness is 60-65; when cured at 200°F for 2-3 hours, its hardness is 15-20 Shore D. Therefore, to obtain the optimum properties, EP21TP-2NV should be cured at room temperature. The color of Part A is tan and Part B is amber, although, other colors are available. Polysulfide-based systems, including EP21TP-2NV, have been used as fuel tank sealants and as potting compounds for electrical connectors exposed to fuels, oils, and lubricants, for many years now. EP21TP-2NV is an excellent choice for use as a sealant, adhesive or potting system for aerospace, electronic, electrical, and specialty OEM where room temperature curing, toughness, and chemical resistance to fuels and related compounds are desirable.
Product Advantages
- Convenient mixing: forgiving one-to-one mix ratio by weight or volume
- Ambient temperature curing imparts optimal chemical resistance and hardness
- Produces tough, bonds; resistant to thermal cycling
- Good hardness and elongation
- Superior electrical insulator
- Superb resistance to fuels and related chemicals
