3" Square Agate Mould

Create stunning faux agate slices with this 3-inch Square Agate Mould — a favourite among resin artists who love the look of natural stone without the weight or cost. The detailed wavy agate pattern is built right into the mould cavity, so every pour comes out with realistic, layered stone-like textures that look beautiful as coasters, wall art, or decorative pieces.

Made from flexible silicone, this mould releases cured epoxy and UV resin cleanly without tearing or distorting the fine surface detail. The 3-inch square format is a practical size for coasters, small trays, and framed art — easy to work with for beginners and consistent enough for small-batch production by home businesses.

• 3-inch square cavity with an intricate agate-pattern texture for realistic stone effects
• Compatible with epoxy resin, UV resin, and casting resin — works with most standard formulas
• Flexible silicone construction allows easy demoulding without cracking or warping your piece
• Smooth mould surface gives a glossy, polished finish straight out of the pour — minimal sanding needed
• Ideal for coasters, wall décor, jewellery bases, fridge magnets, and resin gifting projects
• Reusable and easy to clean — rinse with warm water or wipe with isopropyl alcohol between pours
• Compact size suits small workspaces and is great for practising colour blending and alcohol ink techniques

How to Use

Place the mould on a flat, level surface. Mix your resin according to the manufacturer's ratio, add pigments or alcohol inks for the agate effect, and pour slowly into the cavity. Use a toothpick or skewer to swirl colours for a natural stone look. Allow to cure fully before demoulding — typically 24–48 hours for epoxy resin, or 1–3 minutes under a UV lamp for UV resin.

Safety Tips

Always wear nitrile gloves and work in a well-ventilated area when handling uncured resin. Keep resin and pigments away from children. Wash hands thoroughly after use. Do not use this mould in an oven or microwave.