Resin Coaster Molds — Shapes, Sizes and Techniques
Resin coaster molds are one of the most widely used molds in the resin art world. Coasters are easy to produce, highly customizable, and popular with customers buying handmade resin products.
Because coasters are both decorative and functional, choosing the right mold is important. A high-quality mold ensures that each coaster has smooth edges, a consistent thickness, and a professional finish.
For a full overview of mold systems used in resin art, see our Resin Art Molds — Complete Guide for Resin Artists.
Common Shapes for Resin Coaster Molds
Resin coaster molds are available in many shapes, each suited to different artistic styles.
Round Coaster Molds
Round molds are the most common format used in resin coaster production. Their smooth shape works well with a wide range of resin techniques including pigments, ocean wave effects, and metallic powders.
Square Coaster Molds
Square coaster molds produce a more modern and geometric appearance. These molds are often used for minimalist resin art styles.
Geode Coaster Molds
Geode coaster molds use irregular or mineral-inspired shapes that mimic natural crystal formations.
Artists exploring this decorative style should see Geode Resin Art Molds — How to Choose and Use Them.
Mold Depth and Coaster Thickness
Most resin coaster molds are between 8mm and 12mm deep. This depth allows enough resin to produce a durable coaster while keeping curing times manageable.
Some artists prefer deeper molds when creating layered resin effects. Multi-layer designs using pigments, metallic flakes, or embedded objects often require additional depth.
Artists embedding botanical materials may also review Flower Preservation Resin Molds — A Complete Guide.
Mold Materials Used for Resin Coasters
Most coaster molds are made from flexible silicone. Silicone molds are non-stick and allow cured resin pieces to be removed easily.
High-quality silicone molds produce a glossy finish that reduces the need for sanding or polishing.
Artists comparing mold materials should see Silicone Resin Molds vs HDPE Mold Systems.
Resin Types Used for Coasters
Epoxy casting resin is the most common material used for resin coasters. It cures slowly and produces a clear glossy surface.
UV resin may also be used for smaller or thinner coaster designs.
Understanding mold depth and resin compatibility is important. A full explanation is provided in How to Choose the Right Resin Mold for Your Art Project.
Producing Resin Coasters at Scale
Artists selling resin coasters often produce multiple pieces at once. Using several molds allows artists to pour new pieces while previous pours cure.
Many artists expand their product range by producing trays, jewellery, or decorative panels alongside coaster designs.
Artists producing larger items should review Resin Tray Molds — A Complete Guide for Artists.
Artists working with jewellery casting may also see Resin Jewellery Molds — A Guide for Jewellery Artists.
De-moulding Resin Coasters
Flexible silicone molds allow resin coasters to be removed by gently bending the mold walls.
Removing pieces before the resin is fully cured can cause warping or surface damage.
Artists experiencing de-moulding problems should see Resin Stuck in Mold — How to De-mold Epoxy Safely.
Professional Mold Systems for Large Resin Projects
While coaster molds are typically small silicone molds, larger resin projects such as trays, panels, or river tables may require rigid mold systems.
Professional HDPE mold systems are designed for large epoxy pours and provide structural support during curing.
Explore Professional Epoxy Resin Table Molds for Large Resin Projects
Related Guides for Resin Artists
For more information on resin mold systems see the following guides:
Resin Art Molds — Complete Guide for Resin Artists
DIY Resin Molds — How to Make Resin Molds at Home
FAQ — Resin Coaster Molds
What molds are best for resin coasters?
Flexible silicone molds are most commonly used because they release cured resin easily and produce smooth surfaces.
How thick should resin coasters be?
Most resin coasters are between 8mm and 12mm thick.
Can resin coaster molds be reused?
Yes. High-quality silicone molds can be reused many times if properly cleaned.