Cured epoxies are a major structural type in the plastics technology. Good wear resistance. High resistance to cracking when used to encapsulate metal components. Better resistance to alkalis and solvents than polyester. High dimensional stability.
Limitations are that it has poor oxidative stability, some moisture sensitivity.
Weathering resistance is poor, except cycloaliphatics. Good dielectric strength. Better electrical insulation and dimensional stability than polyesters under high humidity conditions. Better thermal ageing than polyesters. One or two part systems available.