Quick facts
- GP Clear Resin
- General-purpose resin used to build the FRP laminate
- GP Gelcoat Resin
- Polyester surface-coating gelcoat for the mould-facing surface
- Relationship
- The products can be used in the same FRP manufacturing sequence for different roles
- Decision trigger
- Separate the structural laminate requirement from the required surface finish
Buyer question
GP resin and gelcoat are often requested together, but they should not be treated as two names for the same material. A clear selection starts by separating the job of building the laminate from the job of creating the mould-facing surface.
Quick answer
GP Clear Resin is the general-purpose resin used with glass-fibre reinforcement to form the FRP laminate. GP Gelcoat Resin is the published polyester surface-coating product for the mould-facing side of a part.
In a typical build-up, the surface layer and the structural laminate are selected for different reasons. The production team should identify both requirements rather than asking for a single resin to do both jobs.
When to choose each product
Choose GP Clear Resin for the laminate
Use the GP Clear Resin page and TDS when the requirement is to wet out reinforcement and build the general FRP laminate in the published processes.
Choose GP Gelcoat Resin for the surface
Use the GP Gelcoat Resin page and TDS when the requirement concerns the mould-facing surface coating, finish or surface behaviour.
When the project needs both
Discuss the full sequence, part geometry, process and expected surface result. This helps ensure the laminate and surface layer are considered together without treating them as substitutes.
Procurement checklist
Include whether the purchase is for a structural laminate, a surface coating, or a complete build-up; then add the part type, process, quantity and delivery location. This makes the quotation request more precise.
Side-by-side comparison
| Decision factor | GP Clear Resin | GP Gelcoat Resin |
|---|---|---|
| Primary role | Builds the laminate with reinforcement | Provides the mould-facing surface coating |
| Published positioning | General-purpose orthophthalic polyester resin | High-gloss polyester surface coating |
| Use with reinforcement | Used to wet out and bind glass-fibre reinforcement | Not positioned as the bulk laminating resin |
| Selection question | What does the laminate need to do? | What surface finish and mould-facing behaviour are required? |
These products serve different jobs in an FRP build-up. Confirm the product-specific TDS and process requirements before use.
Frequently asked questions
Can GP Clear Resin replace gelcoat?
No. The products have different published roles. GP Clear Resin is used to build the laminate, while GP Gelcoat Resin is positioned as a mould-surface coating.
Can GP resin and gelcoat be used together?
Yes. They can be used in the same FRP manufacturing sequence for different roles: gelcoat on the mould-facing surface and GP resin with reinforcement to build the laminate behind it.
What should a buyer specify in an enquiry?
State whether the enquiry is for the laminate, the visible surface finish, or both. Also share the part type, process, quantity and any required appearance.