Rectangular Castle Storage Box Resin Mold

Diamond-Faceted Resin Mold for a rectangular storage box — this flexible silicone mold for epoxy resin casts a rectangular storage box. The diamond-faceted surface picks up mica, glitter, and gold leaf so every finished piece looks finished right after demolding. Tear-resistant flexible silicone flexes for clean, repeat demolding.

What's in the Kit

Cast a Lid That Sits Flush

The cavity shapes both the box body and its lid, so the two halves come out of the mold as a matched set. Pop bubbles out of the rim before the resin cures, then flex the silicone edge and peel the piece away to keep the edges clean.

A Faceted Surface That Catches Light

The diamond-faceted wall picks up mica powder, gold leaf, and alcohol ink as the resin cures. Layer two colors in the same pour to recreate the gradient look in the photos on a surface that reads like cut stone.

Common Questions

How do I release the finished piece? Wait for the resin to fully cure, then flex the silicone from one edge and peel it away slowly. The soft mold releases cleanly without tearing the cured edges.

What resin works best? Clear epoxy resin takes the faceted texture well. Add mica powder, glitter, metallic foil, or alcohol ink before pouring for a custom look.

How many molds come in the kit? One flexible silicone resin mold. Lids, mechanisms, and resin are not included unless shown as a separate option on this listing.

Care

Wash the mold in warm soapy water and dry it completely before storing it flat, away from direct sunlight.

Note: because this mold is handmade, crafting takes 20-30 days before shipping. Due to current order volume, delivery may take a little longer than usual — thank you for your patience.