Resin Systems
Unsaturated polyester
A cost-efficient crosslinking resin, commonly diluted with a reactive monomer and cured by peroxide initiators.
In simple terms
A cost-efficient crosslinking resin, commonly diluted with a reactive monomer and cured by peroxide initiators.
Best for
Fast room-temperature cure, established processing and cost-sensitive glass-fibre parts.
Watch out for
Higher shrinkage, odour/VOC control, lower adhesion and lower hydrolytic durability than epoxy or vinyl ester.
Typical applications
GRP panels, sanitary products, boats, profiles, covers and transport interiors.
Related tools
Use the calculators to turn these concepts into preliminary engineering estimates.