Free shipping on orders over £29,85 
Shipping Tracking! 
Google
Facebook← Back to how to dilute epoxy resin
Thinning epoxy resin is sometimes needed to improve its flow or help with more intricate casting. Isopropyl alcohol is a common household solvent used for this purpose, but using it correctly is essential for quality results.
Thinning Epoxy Resin: Is Isopropyl Alcohol Suitable?
Yes, you can use isopropyl alcohol—specifically 99.9% pure—in small quantities to thin epoxy resin mixtures. It helps enhance the resin’s flow, making it easier to pour and level, especially for detailed art or coating work. Because isopropyl alcohol evaporates cleanly, it leaves little to no residue when used sparingly, helping maintain the resin’s clarity and quality.
How to Use Isopropyl Alcohol When Thinning Resin
If you decide to thin epoxy resin with isopropyl alcohol, add only a minimal amount after blending your resin and hardener. Too much alcohol can weaken the cured resin or affect its finish, so always start with a drop or two per batch and mix well. For more dramatic effects or bubble removal, a fine mist of alcohol on the surface after pouring also helps.
Our Pure Isopropyl Alcohol 99.9% is ideal for these applications.
When This Matters: Projects That Benefit from Thinning
- Intricate Resin Art: Thinning helps resin flow into detailed moulds or designs without leaving gaps.
- Coatings and Sealings: It can help achieve ultra-clear, level coatings with fewer air bubbles.
- Bubble Removal: Isopropyl alcohol can also be applied to the resin’s surface to eliminate trapped air.
Related products
Related guides
Thinning epoxy resin with isopropyl alcohol can improve pour quality and finish when done carefully. For more on successfully handling and modifying epoxy resin, see our full how to dilute epoxy resin guide.