How to Get the Most Out of Your Jesmonite

Jesmonite® is a versatile, water-based eco-resin that creators love for its silky texture, fast cure time, and stunning results. But whether you're a seasoned maker or new to the material, one of the most satisfying things you can do is make every drop count. In this guide, we’ll share smart, sustainable ways to maximize your Jesmonite®—from precise measuring to creative repurposing and proper storage.

1. Measure Exactly to Avoid Waste

Jesmonite® is magical—so why waste it? One of the best ways to get the most from your materials is by measuring exactly how much you need for your mold before you mix.

Here’s a simple trick:
Fill your mold with water and weigh it in grams. This gives you the volume your Jesmonite mixture needs to fill it completely (since Jesmonite® is roughly the same density as water).

Once you know the weight, plug it into jesmonitecalculator.com to get precise base-to-liquid ratios. This helps you avoid over-pouring and eliminates guesswork, meaning less waste and more savings.

Bonus tip: Round to the nearest 0 or 5 grams to keep things simple without sacrificing precision.

2. Repurpose Leftovers Like a Pro

Even with perfect planning, sometimes you’ll have a little mix left over. Don’t toss it! There are plenty of ways to give that leftover Jesmonite® a second life.

• Make terrazzo chips: Let the extra mixture cure in a thin layer or small mold, then break it into pieces once it’s set. These terrazzo fragments can be used in your next project by adding them into fresh Jesmonite® for a colorful, speckled effect.

• Create a mini mold library: Use leftover Jesmonite® in small silicone molds for items like coasters, buttons, knobs, or jewelry. Keep them on hand for gifts, test pieces, or future drops.

• Recycle broken or failed pieces: Made a mistake? Don’t trash it. Smash it up and embed the pieces into a new mold for a unique, upcycled design. Imperfection can be the start of something beautiful.

3. Store Your Jesmonite® the Right Way

Product waste isn’t just about over-pouring—it’s also about storage. Jesmonite has a shelf life of about 12 months, but only if you treat it right. Here’s how to keep your base, liquid, and pigments in top condition:

• Store in a cool, dry place (50–77°F / 10–25°C) away from direct sunlight and moisture.

• Always close containers tightly to prevent exposure to air and humidity.

• Wipe down caps and nozzles before putting them away to prevent clogs and dried product build-up.

• Use only clean, dry tools to scoop and stir—no double dipping!

• Label containers with the open date to help track product life.

Want more detail? Check out our Instagram post for a quick visual guide to Jesmonite® storage.

In Summary

Getting the most out of your Jesmonite® isn’t just about frugality—it’s a practice of thoughtful making, less waste, and more creativity. By measuring accurately, repurposing leftovers, and storing your materials with care, you’ll save money, protect the planet, and get even more joy out of every pour.

Follow us on Instagram @ftc.creative for more creative tips, tutorials, and inspiration from the Jesmonite® community!