5.5" Bubble Edge Coaster Mould

The 5.5" Bubble Edge Coaster Mould is a silicone mould designed for crafting beautiful, professional-looking resin coasters at home or in your small studio. The distinctive bubble or scalloped border gives each finished coaster a decorative, textured edge that stands out from plain round moulds — no extra tools needed.

Compatible with epoxy resin, UV resin, and concrete, this mould is flexible enough for easy demoulding and durable enough for repeated use. Whether you are making coasters to sell, gift, or keep, the 5.5-inch diameter is a practical everyday size that fits most mugs, glasses, and cups.

• Bubble scalloped border — adds a decorative edge detail to every coaster without any extra effort
• 5.5-inch diameter — ideal size for standard mugs, glasses, and tumblers
• Flexible silicone construction — pops out cured resin cleanly without cracking or distorting your piece
• Works with epoxy, UV resin, and concrete — versatile across popular craft mediums
• Reusable and easy to clean — rinse with warm water after use; no release spray required for most resins
• Smooth interior surface — produces a glossy, polished face on your coaster straight from the mould
• Great for beginners and sellers — simple shape with a premium finish, perfect for craft markets and gifting

How to Use

Lightly spray with mould release if desired, then pour your mixed epoxy or UV resin into the mould. Add pigments, flakes, or dried flowers before the resin sets. Allow epoxy resin to cure for the manufacturer-recommended time (typically 24–48 hours) or cure UV resin under a UV lamp in layers. Flex the mould gently to release the finished coaster.

Safety Tips

Always work with resin in a well-ventilated area and wear nitrile gloves and safety glasses. Follow the resin manufacturer's mixing ratios carefully to ensure a proper cure. Keep resin materials away from children and food surfaces during the crafting process.