Silicone Molds for Concrete and Jesmonite: Shore A and Demold Timing
Silicone molds for concrete and Jesmonite - Shore A, demold timing, draft, mold life, and MOQ 50 custom trays for makers and small brands.
Kyler Yang · Founder5 min read
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Concrete and Jesmonite abrade silicone harder than epoxy. Hobby kits fail when Shore A is too soft or demold is too early. RUUIPON cuts custom silicone molds at MOQ 50 for planters, trays, and branded architectural pieces.
Quick answer: Start Shore A 30-40 for detailed Jesmonite, firmer for coarse concrete; wait full green strength before peel; keep walls 2.5-5 mm and draft on verticals.
Starting Specs
| Mix | Shore A start | Note |
|---|---|---|
| Fine Jesmonite | 30-40 | Detail retention |
| Sand-heavy concrete | 40-50 | Abrasion |
| Large planters | 35-45 | Support walls 3-5 mm |
Shore A by Mix
Too soft stretches; too hard locks undercuts. Guide: Shore hardness guide and epoxy/geode hardness.
Demold Timing
Early demold tears lips. Follow your cement datasheet, then add margin on first articles.
Geometry Limits
Deep undercuts need two-part tools - parting line design and undercut limits.
Mold Life
Expect shorter cycle life than chocolate trays - cycle life.
Frequently Asked Questions
Release agents?
Often yes for concrete - confirm compatibility.
Prototype?
3-7 days after CAD.
MOQ?
50 per design.
Contact?
[email protected] | +86 135 3006 2969 | Contact.
Ready to order custom silicone molds?
Free quote for OEM/ODM projects. MOQ 20 · Prototype 3-7 days · FDA/LFGB available.