Gel coats are a crucial component in many composite products and since they are the exterior protection of composite products, Gel coat type should be chosen wisely and according to the final application.
Below table is a guidance for choosing the right type of gelcoat:
Product Name | Description | Price |
Mechanical properties |
Sagging resistance |
UV resistance |
---|---|---|---|---|---|
Ortho Gelcoat | For general purpose and suitable for decorative parts | $ | ** | *** | *** |
ISO Gelcoat |
Good UV resistant | $$ | *** | *** | ***** |
NPG-ISO Gelcoat |
Good UV and water resistant | $$ | ** | *** | ***** |
Vinyl-ester Gelcoat |
Suitable for acidic conditions and molding | $$$$ | ***** | ***** | ** |
Epoxy Gelcoat |
High mechanical properties | $$$$$ | ****** | ****** | * |