One or two part systems available. Convenient range of cure conditions. No volatiles formed during cure. Excellent adhesion, especially to metal, wood and other polar substrates. Good flow properties permit processing at low pressure and consequent extension of mould life.
Limitations are that many grades have a short shelf life, therefore cool storage is necessary.
Exceptionally suited for encapsulation purposes because of low viscosity, good adhesion. Some grades have a low level of impurity and a high glass transition temperature. Limitations are of high cost, in particular of speciality grades. Available as rigid castings, moldings and laminates. The rigid structure may however result in brittleness.