Master Bond Polymer System EP42HT-2 is a room temperature curable two component epoxy, adhesive, sealant, coating and casting material featuring high temperature resistance along with outstanding chemical resistance. It is widely used in medical devices because of its ability to withstand repeated sterilizations, including radiation, ethylene oxide, chemical sterilants, and steam. In addition, it fully complies with the testing requirements of USP Class VI plastics. While EP42HT-2 is a superior adhesive, sealant and coating, it is also castable to thicknesses exceeding 2-3 inches. EP42HT-2 cures readily at ambient or more quickly at elevated temperatures. One particularly popular cure schedule is "overnight" at room temperature followed by 2-4 hours at 150-200°F.

It has an easy to use 100:40 mix ratio by weight or 100:50 by volume. The cured epoxy compound is resistant to various types of sterilizations, inorganic and organic acids, alkalis, organic solvents and aromatic hydrocarbons. EP42HT-2 is an excellent electrical insulator. Especially noteworthy is its serviceability from -60°F up to 450°F, combined with resistance to steam, chemicals and radiation. Aside from its widespread use in the medical industry, EP42HT-2 is also used in electronics, electrical, fiberoptic and optical as well as OEM type applications. To optimize physical properties including heat resistance, a post cure of 100-130°C for 2-3 hours is recommended.