Free shipping on orders over £29,85 
Shipping Tracking! 
Google
Facebook← Back to How to calculate how much resin is needed?
When planning a resin project, it’s natural to wonder if the final cured volume will match your measurements. Understanding resin shrinkage helps achieve precise results, especially for detailed creations.
How Much Does Resin Shrink?
Epoxy resin is specifically formulated to keep shrinkage to a minimum during curing. For most applications, the decrease in volume is so slight that it’s barely detectable. However, for precision projects—like casting moulds or pieces that must match exact dimensions—it’s wise to allow a small margin to compensate for this subtle effect. Although major volume loss is uncommon, accounting for a tiny fraction of shrinkage ensures your final results aren’t off by just a couple of millimetres.
Keeping Measurements Accurate
For the best outcomes, always measure and mix your resin components as accurately as possible. Using a reliable tool such as the Precision Digital Scales for Resin and Crafting will help ensure your ratios are spot on, reducing any margin for error. Especially when working with fitted items, an accurate graduated measuring cup is equally useful for correctly dosing resin and hardener.
When Does Shrinkage Matter Most?
- Detailed Moulds: Small differences may impact the fit or final look.
- Functional Parts: Projects like tabletops or inlays benefit from factoring in minimal shrinkage for a snug finish.
If you’re working on an artistic or decorative piece, the minor shrinkage of epoxy resin is unlikely to be noticed. But for precision work, a little planning goes a long way.
Related products
Related guides
While resin shrinkage is generally minimal, considering it as part of your planning helps ensure your results meet expectations. For more tips on measuring and calculating resin amounts for your project, explore our full guide on how to calculate how much resin is needed.