Quick facts
- Shared Positioning
- General-purpose orthophthalic polyester resins for FRP work
- GP Clear Resin
- Clear; 350-450 cPs; gel time under 8 minutes
- GP Yellow Resin
- Transparent yellow; 450-600 cPs at 25 C; gel time 10-15 minutes
- Best Starting Point
- Confirm the required resin colour, viscosity and working window; do not assume the supplied resin colour defines the finished FRP part
Buyer question
A common FRP purchasing question is whether a clear GP grade or a yellow GP grade is the better fit for a routine manufacturing line. These are related general-purpose polyester resin grades, but they are not interchangeable without checking what the part, process and appearance requirement actually demand.
Quick answer
Start with the role of resin colour in the process. GP Clear Resin is the clear general-purpose grade; GP Yellow Resin is supplied transparent yellow. Then compare the published processing data: GP Clear Resin has a lower published viscosity range and a shorter published gel time than the GP Yellow grade.
Neither option is automatically better. The appropriate choice depends on whether the resin colour will matter, the reinforcement and moulding workflow, and the working window needed by the production team.
When to choose each grade
Consider GP Clear Resin
Consider the clear grade when a colourless resin is relevant to the application and the published 350-450 cPs viscosity with gel time under 8 minutes aligns with the planned workflow. A clear supplied resin does not by itself establish the final appearance of a reinforced, pigmented or surface-finished part. Confirm fit against the product TDS before ordering.
Consider GP Yellow Resin
Consider the transparent-yellow grade when its supplied colour is acceptable in the process or build-up and its published 450-600 cPs viscosity at 25 C and 10-15 minute gel time suit the line. The supplied resin colour is not, on its own, a claim about the finished reinforced part. Check its product page for the applicable details.
When not to force either choice
If the job has a specific chemical-resistance, fire-performance, surface-coating or speciality bonding requirement, compare a purpose-specific grade instead of assuming either GP resin is suitable.
Details to share before requesting a quote
Share the finished part, manufacturing process, expected quantity, required appearance, existing grade if any, and delivery location. This gives the supplier enough context to direct the enquiry to the relevant product data and grade discussion.
Side-by-side comparison
| Decision factor | GP Clear Resin | GP Yellow Resin |
|---|---|---|
| Appearance | Clear | Transparent yellow |
| Published viscosity | 350-450 cPs | 450-600 cPs at 25 C |
| Published gel time | Under 8 minutes | 10-15 minutes |
| Curing system | Non-accelerated | Non-accelerated |
| Packaging / MOQ | Confirmed on enquiry for Nepal | Confirmed on enquiry for Nepal |
Compare the published technical data for the specific batch and process before purchase. Resin selection should not be made on colour alone.
Frequently asked questions
Are GP Clear Resin and GP Yellow Resin used for the same type of FRP work?
Both are general-purpose orthophthalic polyester resins used across common FRP work. The choice should consider the required appearance, published viscosity, gel time and the specific process.
When is GP Clear Resin the more relevant option?
GP Clear Resin is the grade to discuss where a clear or colourless resin is relevant to the finished process, alongside its published viscosity and gel time.
Can procurement compare the two grades only on price?
No. Confirm the intended process, appearance requirement, technical data, quantity and delivery location before comparing quotations.