Sculptural Candle RTV: Slit, Two-Part, or Jacket?
A sculptural candle can leave a slit skin and still bulge when the wax is hot. If you are locking structure on a 3D wax tool, this page is that choice: peel, controlled slit, keyed two-part, or a rigid shell - and whether the filled silicone holds shape. Those are two problems. Solving release does not solve bulge.
RUUIPON pours platinum RTV candle tools in Bao'an, Shenzhen (Licheng Technology Industry Park, Xinhe Blvd, Shajing; USCC 91440300MA5FAXCN9W) since 2018. Simple 3D is USD 50 when that CAD scope applies. Prototype is 3-7 business days after CAD lock. Production is MOQ 20 pieces per design. Candle tools are not food-contact trays. The SKU lives on custom silicone candle molds. Pillar bark and wick-on-a-column live on custom pillar candle molds.
Where this page sits
Buy the mold on custom silicone candle molds. CAD-to-repeat supplier path: candle mold production. Pillar geometry: custom pillar candle molds. This page covers sculptural structure: slit vs split vs shell.
When a slit is cleaner
A one-piece skin with a planned slit can hide the seam. It works when most of the candle peels from one skin, one opening is enough, the slit sits on a hidden edge, the wax is strong at demold, and the slit closes for the pour. A random knife cut after cure is not a plan. Do not run the cut through the logo, a thin tear start, or a high-pressure fill zone.
When two-part is safer
Use a keyed split when undercuts sit on both sides, the part is full 3D, wax is fragile, a long slit would over-stretch, or a controlled seam is cheaper than distortion. Then you need parting line, keys, close, seam support, and often a gate / vent. Hide the seam on a back edge, ridge, or texture valley.
Typical shop values
Reference values only. Confirm material-specific limits against the supplier’s technical data and agree project acceptance criteria before production. No food-contact row.
| Item | Typical shop value |
|---|---|
| Two questions | Can it release? Can the filled skin hold shape? |
| Cavity Shore | Often 30A-40A on pillars / figurines; peel vs split from texture |
| Tall / floppy wet wax | Jacket or sleeve before you raise Shore A |
| Shell vs silicone split | Independent - jacket for rigidity, silicone split for release |
| Proof | Full wax fill, intended height, real support, real demold |
| 3D / CAD | USD 50 when that modeling scope applies |
| Prototype after CAD lock | 3-7 business days |
| Production after written pass | MOQ 20 pieces per design |
| Contact | [email protected] · +86 135 3006 2969 |
Bulge and shell
Empty-upright can still deform when filled. Height, unsupported span, Shore, wall, wax mass, pour temperature, and support decide bulge. A taller thin mold may need a sleeve, frame, printed shell, or FRP. The shell holds shape; the silicone still has to peel. A one-piece slit skin can sit in a multi-section rigid jacket. A two-part silicone can sit in one sleeve. Do not assume the splits must match.
Display face and wax proof
Mark hero face, logo, gloss, fine texture, and edges that can hide finish. Then compare splits. A slightly harder tool can save cleanup on every candle. A dry assemble proves only fit. Prototype with normal wax, intended fill height, actual support, normal cool, and the real open sequence. Inspect bulge, flash, leak, wick, detail, strain, and operator effort. Wax shrink is formula-specific. Do not fight one fixed percentage.
Worked example: quilted bag
Typical job, not a named PO. Handle locked a one-piece peel. We put a slit off the logo face, jacketed the tall pour, and prototype-filled the real wax. Raising Shore alone would have torn the quilting.
When this page does not apply
This structure page does not replace custom silicone candle molds, pillar geometry, or candle production. It does not apply to wax melts sold by grams. It does not apply to soap. It does not apply to a molded silicone vessel in HCR / LSR - send an HTV product RFQ here.
RFQs we will not accept as-is
A random post-cure knife cut as the slit plan. Raising Shore to skip a jacket on a tall pour. Hanging FDA / LFGB papers on a wax cavity. Sending a silicone-part vessel through this RTV structure page.
Matched next step
Send the sculpture (file or photos), wax type, height, wick plan, and the face that cannot show a seam. We will name slit, two-part, jacket, or a mix. "Sculptural candle mold" alone is not a structure brief.
Send sculpture, wax, and no-seam face · Candle product · Pillar geometry · Candle production
[email protected] · +86 135 3006 2969 · Licheng Technology Industry Park, Xinhe Blvd, Shajing, Bao'an, Shenzhen. USCC 91440300MA5FAXCN9W.
FAQ
Is this the candle product page? No. Buy the mold there. Structure lives here.
Slit or two-part? Release path and wax strength first. Pretty seams second.
Does a jacket replace a split? No. Jacket holds shape. Split opens the part.
Do you quote food papers on wax? No.
What is MOQ after a pass? 20 pieces per design.