LGEGE Silicone Square Coaster Moulds 4-Pack 4.3in | Clear Flexible, Smooth Interior for Resin & Cement

These LGEGE square silicone coaster moulds let you cast four identical 4.3" x 4.3" coasters from resin, cement, or polymer clay with a smooth, easy-release finish.

Made from flexible, clear silicone, this set includes four square moulds sized 10.8 x 10.8 x 1.3 cm each, designed for hobbyists and craft sellers who want reliable, repeatable results. The smooth internal surface minimizes sanding and polishing after curing, while the mould’s balanced firmness helps prevent warping at the base. Whether you’re making high-gloss resin pieces, decorative cement coasters, or polymer clay craft bases, these moulds provide a consistent shape and a professional-looking flat bottom.

How simple is it to demold and clean finished pieces?

Demolding is straightforward thanks to the silicone’s flexibility and non-stick interior. Once your material has fully cured, gently peel the mould away from the edges and push from the underside to release the piece without force. Cleaning takes just warm water and mild soap—no solvents required—so the mould stays ready for the next project.

• Flexible silicone prevents sticking and simplifies removal.
• Smooth interior reduces need for post-cure sanding.
• Washable with soap and water for fast reuse.
• Durable material resists deformation during repeated use.

Which casting materials work best with these moulds?

The moulds accept a variety of craft casting media, including epoxy and polyester resins, concrete or cement mixes, and polymer clay. For resin pours, the flat bottoms and square form produce clean edges and glossy surfaces; for cement or clay, the mould keeps consistent thickness and shape. Adjust release techniques—such as a thin mould release or dust coat—based on the material to ensure smooth extraction.

• Epoxy resin and UV resin for high-gloss coasters.
• Concrete or cement for a textured, industrial look.
• Polymer clay for baked, durable craft projects.
• Additives like pigments, mica, or embedded objects are compatible.

How long do these silicone moulds last and how should I care for them?

Crafted from sturdy, clear silicone, the moulds resist tearing and maintain shape over many pours when used properly. Avoid sharp tools when trimming and keep them away from direct flame or extreme heat. Store flat or stacked gently to prevent bending the centre bottom and wash after each use to remove residue that could affect future pours.

• Sturdy silicone construction for repeated use.
• Keep away from open flame and high heat to preserve shape.
• Store flat to avoid indentations or warping.
• Clean after each use to prevent build-up and contamination.

Who is this set for? These LGEGE square moulds suit makers from beginners to small-batch sellers: DIY hobbyists creating personalised gifts, resin artists producing glossy coasters, home decorators crafting tabletop accents, and crafters working with cement or polymer clay. If you want consistent square coaster results with minimal finishing work and the flexibility to experiment with colour, inlays, or mixed media, this four-piece mould set is a practical, budget-friendly choice.