What to Do If Incorrect Proportions Are Used in Epoxy Resin

Q: Steps to Take if You've Used the Wrong Proportions

If the resin is still wet or tacky: The best option is to remove as much uncured material as possible. Use a scraper to lift it off and clean the surface before starting again. If the resin has partially set: Sand down any sticky or soft areas and re-pour with correctly measured resin and hardener. Make sure the surface is free from dust and debris before pouring the new layer. For small flaws: Sometimes a thin, correctly mixed layer over the affected section may help seal and harden the surface, but this only works if underlying issues are minor.

← Back to How to get the correct proportions for epoxy resin?

What to Do If Incorrect Proportions Are Used

Working with epoxy resin requires precision, and even minor errors in measurement can affect your project’s finish. Here’s what you should do if the proportions weren’t mixed correctly.

Potential Consequences of Incorrect Ratios

Mixing epoxy resin with the wrong proportions of resin to hardener can cause a variety of issues. Most commonly, you’ll encounter sticky or uncured surfaces, or the resin may become unexpectedly brittle. An incorrect mix prevents the resin from curing fully or developing its intended strength, leaving the project with poor durability and appearance.

Steps to Take if You’ve Used the Wrong Proportions

If the resin is still wet or tacky: The best option is to remove as much uncured material as possible. Use a scraper to lift it off and clean the surface before starting again.
If the resin has partially set: Sand down any sticky or soft areas and re-pour with correctly measured resin and hardener. Make sure the surface is free from dust and debris before pouring the new layer.
For small flaws: Sometimes a thin, correctly mixed layer over the affected section may help seal and harden the surface, but this only works if underlying issues are minor.

Tips for Accurate Mixing Next Time

Prevention is always simpler than repair. Use accurate measuring equipment such as digital scales or measuring cups appropriate to your product. Choosing resins with user-friendly mixing ratios, like the One-2-One, which mixes 1:1 by volume, can dramatically reduce errors and help guarantee reliable results. Read the manufacturer’s instructions carefully before you begin and always double-check your measurements.

When Accurate Proportions Are Especially Important

If you’re making items that need to be strong and long-lasting—such as tables, jewellery, or decorative pieces—precise mixing is essential for both safety and aesthetics. Minor errors in these cases will almost always be visible or reduce the life of your project.

Related guides

How To Get The Correct Proportions For Epoxy Resin

Mixing your epoxy resin correctly is key to achieving a durable, attractive finish. For more guidance on getting the right proportions from the start, visit our main guide on how to get the correct proportions for epoxy resin.