Toughened epoxy polysulfide hybrid offers chemical resistance

22nd July 2019

Alex Lynn

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Master Bond EP21TP-2NV is a two part epoxy polysulfide hybrid formulated for use as an adhesive, sealant and potting system. It withstands prolonged exposure to many harsh chemicals including fuels, oils, hydrocarbons and hydraulic fluids. It is also fully RoHS compliant, meeting RoHS3 Directive (EU) 2015/863.

EP21TP-2NV offers an elongation between 40 to 80% at room temperature and superior toughness with a tensile strength of 3,000 to 4,000 psi. It resists aggressive thermal cycling over the service temperature range of -62 to +121°C. With a dielectric constant of 3.7 at 60Hz, the system provides excellent electrical insulation properties.

Master Bond EP21TP-2NV cures at room temperature in 48 to 72 hours to form a rigid material with a Shore D hardness measuring 60 to 65. A unique feature of EP21TP-2NV is its ability to cure softer with the addition of heat. For example, when cured at 200°F for two to three hours its hardness decreases to 15 to 20 Shore D.

EP21TP-2NV bonds well to a variety of substrates such as metals, glass, ceramics and many rubber and plastic materials. This compound is available in standard size containers from ½ pint, pint, quart and gallon kits as well as specialty packaging including double barrel syringes and gun dispensers.

Master Bond EP21TP-2NV is a two part epoxy polysulfide featuring superior chemical and thermal cycling resistance while maintaining tough, flexible bonds.