Free shipping on orders over £29,85 
Shipping Tracking! 
Google
Facebook← Back to How do you dilute polyester resin?
Mixing extra additives or solvents into polyester resin can be risky if you’re unsure of their compatibility. Taking the right precautions is essential to achieve a strong, reliable finish.
Why Compatibility Matters
Adding any substance to polyester resin changes its chemical balance. Incompatible products can affect curing, strength, adhesion, and the final appearance. That’s why products like the Resin Fibreglass Repair Kit are supplied as ready-to-use kits that perform best without modification.
How to Check Compatibility
Always refer to the technical information for your resin and any additives you intend to use. If a product or kit does not specifically mention dilution or the use of thinners, do not alter the formulation. For creative applications—such as adding cell effects with “Resi-Blast”—ensure the additive is explicitly marked as suitable for polyester resin and follow all usage instructions carefully.
When This Matters
- If you want to change working properties like viscosity or cure speed.
- When creating effects or blending pigments.
- When working on structural repairs where durability is critical.
Mistakes in compatibility can mean weak repairs or costly rework, so it’s not worth the gamble.
Related products
Related guides
Taking the time to confirm compatibility helps ensure your polyester resin project succeeds—whether you’re reinforcing with fibreglass or experimenting with artistic finishes. For more on safe and effective resin use, revisit our main guide on how to dilute polyester resin.