⚠️ Important: Our silicone moulds are designed for wax melt and resin use only. They are not suitable for food, baking, chocolate, or any consumable products.
Introduction
Silicone moulds are the go-to choice for resin casting — their flexibility makes demoulding effortless, and they capture even the finest details beautifully. Whether you're making jewellery, decorations, or keepsakes, this guide covers everything you need to get started with resin and silicone moulds.
Choosing the Right Resin
There are two main types of resin used with silicone moulds:
- Epoxy resin — two-part (resin + hardener), self-levels well, and gives a crystal-clear finish. Cure time is typically 24–72 hours. Best for most mould shapes.
- UV resin — single-part, cures in minutes under a UV lamp. Ideal for small, shallow moulds and quick projects.
For most of our Resin Moulds, epoxy resin gives the best results due to its self-levelling properties and clarity.
What You'll Need
- Epoxy or UV resin
- Mixing cups and silicone stirring sticks
- Resin pigments, alcohol inks, or mica powders (optional)
- Inclusions: glitter, dried flowers, foil flakes (optional)
- A heat gun or lighter (to pop surface bubbles)
- Nitrile gloves and a well-ventilated workspace
- Your silicone mould — browse our Resin collection and 3D Moulds
Step-by-Step: Casting Resin in a Silicone Mould
Step 1 — Prepare Your Workspace
Work in a warm (20–25°C), dust-free, well-ventilated area. Lay down a silicone mat or cling film to protect your surface. Put on your gloves — uncured resin is a skin irritant.
Step 2 — Mix Your Resin
Follow the manufacturer's ratio precisely — typically 1:1 or 2:1 (resin to hardener) by volume or weight. Mix slowly for 3–5 minutes, scraping the sides and bottom of the cup. Thorough mixing is critical — undermixing causes sticky, uncured patches.
Step 3 — Add Colour and Inclusions
Divide your mixed resin into separate cups if using multiple colours. Add pigment, alcohol ink, or mica powder and stir well. Add glitter, dried flowers, or other inclusions at this stage too.
Step 4 — Pour into Your Mould
Pour slowly from a low height to minimise bubbles. For layered effects, pour one colour at a time and allow partial curing between layers. Fill to just below the top of the mould cavity.
Step 5 — Remove Bubbles
Pass a heat gun or lighter briefly over the surface — the heat pops surface bubbles instantly. Don't hold the heat too close or for too long, as this can yellow the resin.
Step 6 — Cure
Cover loosely (to keep dust off) and leave to cure on a flat surface. Epoxy resin typically takes 24–48 hours to demould and up to 72 hours for a full cure. UV resin cures in 1–5 minutes under a UV lamp.
Step 7 — Demould
Once fully cured, gently flex the silicone mould and push from the back to release your piece. Silicone's flexibility means your resin cast should pop out cleanly without damage.
Troubleshooting Common Issues
- Sticky or soft resin — usually caused by incorrect mixing ratio or insufficient mixing time. Always measure accurately and mix thoroughly.
- Bubbles in the finished piece — mix more slowly, warm your resin slightly before mixing, and use a heat gun after pouring.
- Cloudy or yellowed resin — caused by moisture, overheating, or low-quality resin. Use a reputable brand and avoid humid conditions.
- Resin sticking to the mould — this shouldn't happen with silicone, but if it does, ensure the resin is fully cured before attempting to demould.
Shop Our Resin Moulds
Find your perfect shape in our Resin Moulds collection, including intricate 3D Moulds, Mini Moulds for jewellery and small casts, and statement Duo and Trio Moulds for multi-piece sets.