How to Make Large Resin Spheres at Home: A Practical Guide

← Back to How do you make a sphere mould with resin?

Creating large resin spheres at home is absolutely possible with the right approach. Whether you want a striking art piece or a unique decorative accent, the essential step is finding or making a suitable mould for your project.

Choosing or Making a Large Sphere Mould

For large resin spheres beyond standard mould sizes, a custom silicone mould is typically needed. One practical technique is to use a solid object such as a wooden ball—as found in this Wooden Ball for Epoxy Resin Projects—as a template. By coating the ball and casting silicone around it, you form a durable mould that can be reused for multiple pours. Ready-made silicone sphere moulds, like the “3 Sphere” mould, are perfectly suited for smaller projects up to 2.5cm, so a custom approach becomes necessary for anything larger.

Tips for Successful Resin Sphere Casting

When working with resin, ensure your mould is clean and dry before pouring to achieve a smooth finish. If you make your own silicone mould, allow it to cure completely before use. Pour your resin in stages for large spheres to minimise bubbles and avoid heat buildup, which can crack the piece. For truly spherical shapes, consider using a two-part mould or fill a hemispherical mould in two steps and join the halves once cured. Always demould your resin creation within 12 hours if possible to reduce the risk of adhesion to the silicone.

When Does This Matter?

Choosing the correct approach is especially important when you want a seamless, bubble-free, and perfectly rounded result—whether you’re making paperweights, decorative art, or embedding keepsakes inside your resin sphere. Investing in a high-quality wooden template or professional-grade silicone ensures your finished piece looks polished and lasts over time.

Related guides

How Do You Make A Sphere Mould With Resin

Making large resin spheres at home allows for endless creative possibilities, provided you start with a suitable mould. For more detailed techniques and general guidance on resin mould making, see the main page: How do you make a sphere mould with resin?