Resin Molds
109 resin molds in flexible silicone, built for epoxy and UV resin - pendants, earrings, keychains, coasters, trays, ornaments and figurines, including multi-cavity sets for casting in batches. Resin cures hard and clear, takes pigment and glitter, and can suspend inclusions, which makes it the material of choice for anything that needs to be handled or worn.
Does epoxy stick to silicone?
No. Epoxy and UV resin do not chemically bond to cured silicone, which is exactly why silicone is the standard material for resin molds. The resin cures against the surface and then releases when you flex the mold. You do not need a release agent, and using one on a detailed mold usually costs you more surface crispness than it gains you.
How long to leave resin in the mold
Longer than the label says, in practice. Most epoxies quote a demold time and a full-cure time, and the demold time assumes ideal temperature. Pulling a piece early is the single most common reason casts come out bendy, tacky or dented by fingerprints. If your workspace is cool, extend the wait - resin cures by reaction, and cold slows the reaction down. UV resin is the exception: thin layers cure in minutes under a lamp, but thick pours need to be built up in stages because UV light does not reach the bottom.
What to cast in a resin mold
Pigment and mica give solid or pearlescent colour; alcohol ink gives translucent depth. Dried flowers, foil, glitter and small keepsakes can all be suspended, but anything with moisture in it - fresh petals, untreated wood - will cloud the resin or stop it curing. Dry inclusions completely first.
Bubbles
Bubbles come from mixing, not pouring. Stir slowly and scrape the sides rather than whipping air in, let the mixed cup sit a minute before pouring, and pour in a thin stream from a height so bubbles break on the way down. A heat gun passed quickly over the surface pops what is left.
Resin molds, plaster molds or candle molds - which do you actually need?
Usually the same mold. What changes is what you pour into it. Nearly every shape on this page is also rated for plaster and wax, so one silicone shell can give you three different products. Resin is the pick when you want clarity, weight, or something suspended inside. Our plaster molds cover the same shapes for matte, paintable decor at a fraction of the material cost, and the candle molds are the subset with the wall thickness and cavity depth a wick needs. Choose by the finish you want, not by the label on the mold.
Resin mold questions we get asked
Are these resin molds reusable? Yes. Platinum-cure silicone takes hundreds of casts. What kills a mold is heat, UV and abrasion - not resin. Store molds flat, out of sunlight, and never scrape cured resin off with anything metal.
How do I clean sticky resin molds? Let the residue cure fully first, then peel it. Uncured resin wipes off with isopropyl alcohol. If a mold still feels tacky after cleaning, the last cast was under-mixed and left uncured resin in the surface - a wash with warm soapy water and a full dry usually resets it.
Can I use the same mold for resin and food? No. Once a mold has held epoxy it stays a craft mold. Keep food-grade molds separate.
How much resin do I need for one of these? Fill the empty cavity with water, pour it into a measuring cup, and that volume in millilitres is close enough to the resin volume you need. Our resin calculator does the same job for multiple cavities at once.
