Mixing Ratios and Tips for Epoxy Resin Casting

Getting the resin-to-hardener ratio right is essential for any successful epoxy casting project—whether you’re working on deep pours, river tables, or a clear, protective surface. This concise guide shows you how to choose and check the correct proportions for popular ResinPro products and helps you avoid mistakes that could leave your work uncured or sticky.

Recommended Mixing Ratios for Popular Epoxy Resins

Each ResinPro epoxy resin is designed for a specific mixing proportion—always measure accurately by weight, using a digital scale. Here are the typical ratios for our bestsellers:

“Epoxytable 10-Ten”: 4:1 (resin : hardener)
EpoxyTable 5-Five: 100:55 (resin : hardener)
Trasparente: 100:60 (resin : hardener)
Icrystal: 2:1 (resin : hardener, by weight)

Always double-check your product’s packaging or supplied instructions to confirm the recommended ratio before you start mixing. Using the correct ratio is critical for clarity and a fully cured finish.

Mixing and Measuring: Best Practices for a Reliable Cure

Once you’ve verified the correct ratio, focus on precision:

Measure both resin and hardener separately and by weight; never estimate by volume or eye.
Pour both components into a clean, dry container and mix slowly, scraping the sides and bottom thoroughly.
For larger or more complex projects, use a new container for a second round of mixing.
Work at room temperature in a dust-free environment.

Following these steps helps you avoid common problems like tacky surfaces, inaccurate cures, or unwanted cloudiness—especially important for thick pours and detailed casts.

How to Avoid Common Mixing Mistakes

The right ratio is only effective if you avoid other simple errors:

Never change the stated mixing ratio to speed up or slow down the curing time—this can cause incomplete curing.
Do not add any water or other liquids to your mixture.
Mix only the amount you need; this reduces waste and keeps ratio accuracy high.

Take the time to read your product’s label before every new batch, especially if you are using a different resin or working on a new type of project.