3" Diamond Round Mould

The 3" Diamond Round Mould is a silicone mould designed to cast stunning faceted disc shapes with a geometric diamond-cut surface pattern. Each pour produces a beautifully textured round piece that catches light from every angle — ideal for resin coasters, decorative discs, paperweights, and wall art accents.

Made from flexible, food-grade silicone, this mould releases cured epoxy and UV resin cleanly without tearing or distortion. The 3-inch diameter is a versatile size suited for both standalone pieces and sets. Works with two-part epoxy resin, UV resin, and polyester resin.

• Faceted diamond surface: Multi-faceted top creates a prismatic effect that enhances pigments, glitters, and alcohol inks beautifully.
• Flexible silicone build: Easy demould — simply flex the mould to pop out your cured piece without cracking or warping the cast.
• 3-inch diameter: Practical size for coasters, decorative rounds, and jewellery display pieces — works solo or in matching sets.
• Compatible with multiple resins: Use with two-part epoxy resin, UV resin, or polyester resin for a wide range of projects.
• Reusable and durable: Silicone withstands repeated pours; rinse with soap and water between uses to extend mould life.
• Crisp detail retention: Captures sharp facet lines and smooth flat backs for a polished, professional finish straight from the mould.
• Great for beginners and sellers: Simple pour-and-cure process makes it accessible for hobbyists; consistent results suit small-batch craft businesses.

How to Use

Lightly spray the mould with a mould release agent or wipe with petroleum jelly for easier demoulding. Mix your resin according to the manufacturer's ratio, add pigments or inclusions, and pour slowly to avoid air bubbles. Allow to cure fully before flexing the mould to release. For UV resin, cure under a UV lamp in layers of 2–3 mm at a time.

Safety Tips

Always work in a well-ventilated area when using epoxy or polyester resin. Wear nitrile gloves and safety glasses to avoid skin and eye contact with uncured resin. Keep resin materials away from children. Wash hands thoroughly after handling.