Master Bond Polymer System EP19HT is a storage stable one component liquid epoxy resin system for durable, high performance adhesive/sealants, impregnants and liners. It features remarkably long shelf life and excellent storage characteristics at ambient temperatures yet cures readily at elevated temperatures to a tough, strong and chemically resistant thermoset plastic. Low viscosity facilitates handling at ambient temperatures and is particularly desirable for impregnation applications. Master Bond EP19HT is 100% reactive and does not contain any solvents or diluents, shrinkage upon cure in minimal. Recommended cure schedule is 1 hour at 250°F. Shorter cure times can be achieved at temperatures between 325/350°F. The cured material has high physical strength properties (tensile strength more than 10,000 psi), is thermally stable (heat deflection temperature more than 280°F) and has superior electrical insulation properties (volume resistivity greater than 10¹⁵ ohm cm) as well as remarkably good chemical resistant properties. EP19HT is widely used in mechanical/electrical/electronic applications as an adhesive/sealant. It can also be used to impregnate porous metals and nonmetals and form high strength, chemically resistant liners. EP19HT can be used over the remarkably wide temperature range of -60°F to +400°F. The Master Bond Polymer System EP19HT has a shelf life of 4 months when stored at 75°F in unopened containers.