Solution
Custom RTV Molds for Candles, Soap, and Wax Melts
A candle and a soap bar can share a silhouette and still need different RTV decisions. Wax shrinks as it cools. Cold-process soap is alkaline while it cures. Wax melts are sold by grams and snap lines, not by how tall the mold looks on a shelf.
This path is for fragrance, bath, and gift brands that need a reusable platinum RTV casting mold — photos, sketch, or CAD, then a 3D-printed pattern, often a temporary silicone flip, a resin production mother, then batch RTV — at MOQ 20 after a prototype pour of the real wax or batter. RUUIPON, Shenzhen / Bao'an since 2018. Prototype commonly 3–7 days after CAD lock. If you're actually buying a molded silicone product (a silicone candle vessel, a soap dish as a part), that's an HTV product RFQ here, not a candle-mold PO.
Who this is for
Home-fragrance and bath lines launching a signature shape: pillars, figurines, logo soap bars and loaves, snap-bar wax melts. You care about seam placement, wick access, logo depth, release on unmold day, and whether a deep texture will trap wax.
Not for: paraffin-ready metal molds as a commodity SKU, or silicone *goods* tooled in steel.
Typical job
Three programs we treat as one design language only after each tool is engineered for its material:
- Pillar / figurine candle. One-piece peel if the shape allows; keyed split if it doesn't. Seam where you can dress it. Wick hole or wick-on-pour plan. Deep texture reviewed so wax doesn't lock. Typical cavity Shore often 30A–40A platinum; jacket on a tall, wet pour. Order the SKU on custom silicone candle molds. Pillar bark, draft, and wick-pin geometry: custom pillar candle molds. CAD lock to repeat tools: candle mold production.
- Cold-process or melt-and-pour soap. Softer peel is usually the point — often 25A–35A — plus logo depth that releases on unmold day. A 6- or 20-cavity loaf tray can hold serious filled weight; that's a frame / jacket question, not a prettier CAD. Order the SKU on custom silicone soap molds.
- Wax melt / snap bar. Cavity grams and break-groove depth first. Typical 30A–40A. Fragrance-oil exposure and cleaning belong in the RFQ because they change mold life. Order the SKU on custom silicone wax melt molds.
Common mix-up: one “candle & soap mold” line item for all three. Artwork can be shared. Shore, split, wick, and grams cannot. Don't send a generic quote request that doesn't name candle, soap, or melt.
What to send
- Wax type (soy, paraffin, blend) or soap process (CP, HP, MP) and pour / cure temperature
- Wick plan: hole in the mold, wick pin, or after-drill
- Target candle size or soap / melt grams, and pieces per pack
- Photos or STL of undercuts, deep texture, two-sided logos
- Fresh-pour weight of a large soap tray (handling, not just cavity count)
- Fragrance system if melts or CP will see a lot of oil
- First quantity and whether candles, melts, and soap should share a master family
Typical shop values
Reference values only. Confirm material-specific limits against the supplier’s technical data and agree project acceptance criteria before production. Confirm on the quote for your wax or batter.
| Item | Typical shop value |
|---|---|
| Candle cavity Shore | Often 30A–40A platinum, heat-resistant grade |
| Soap cavity Shore | Often 25A–35A for a clean peel |
| Wax-melt cavity Shore | Often 30A–40A; design to grams, not overall inches |
| Mix | Platinum 1:1 or 10:1; vacuum degas until the foam collapses |
| Linear shrink (tool) | ~0.1–0.3% platinum on the master — wax has its own cool shrink on top |
| Split vs peel | Peel if silicone can come off without tearing; else keyed split + seam plan |
| Tall / heavy pour | Support jacket or rigid shell |
| MOQ / prototype | 20 mold pieces per design; prototype pour 3–7 days after CAD lock |
When RUUIPON is the wrong quote
We would not quote this path if you need:
- Molded silicone *parts* (vessels, lids, applicators) in HCR or LSR → an HTV product or mold RFQ here, or ask us if you need a high-volume LSR cold-runner tool steel, cold-runner on LSR.
- High-volume metal candle dies or stock polycarbonate soap trays. Different shops.
- A one-cavity hobby mold you'll use twice. Say the real quantity; MOQ 20 is a production starter, not a craft-store single.
A family of 20 signature pillars for a seasonal drop belongs here. A silicone tumbler you want 5,000 of does not.
RUUIPON Mold Structure Decision
- Flat-back melt / soap tray? - pillar / figurine / two-sided -> Can it peel without tearing texture?
- Can it peel without tearing texture? - yes -> Open-back RTV
- Can it peel without tearing texture? - no -> Keyed split; place the seam on purpose
- Tall wet wax or heavy soap tray? - small shallow melt -> Open-back RTV
RFQs we will not accept as-is
A one-piece glove on a sculpted pillar that needs a seam you can hide. Candle Shore on a CP soap loaf because the artwork matches. Skipping the jacket on a tall pour to cheapen the quote. Designing a snap bar from a pretty outline and hoping grams land in the clamshell. Sending a silicone-part vessel to this RTV queue - that is an HTV product RFQ here, or ask us for a high-volume LSR tool
What to ask when you're buying
- One-piece or split, and where does the seam sit on the finished candle?
- How is the wick handled in the tool?
- What Shore for *this* wax vs *this* soap, and is a shell included?
- For melts: target grams and break-line depth on the drawing?
- Prototype with my actual wax or batter before MOQ 20?
Worked example: 70 mm soy pillar, 150 mm tall, bark texture, wick pin, 20 molds. That's a split-or-peel call from the texture depth, platinum ~35A, jacket if the pour is floppy. A 100 g logo CP bar, 8 cavities, is a softer open-back tray with a frame — same brand file, different PO line.
Matched next step
Name the object: candle, soap, or wax melt. Send process, pour temperature, wick plan or grams, and a photo or STL. We'll name peel vs split, Shore, jacket, and whether this is actually a finished part. A silhouette alone is not enough to quote.
Send a candle, soap, or melt RFQ · Candle molds · Soap molds · Wax melt molds · Pillar geometry · Candle production path
[email protected] · +86 135 3006 2969 · Licheng Technology Industry Park, Bao'an, Shenzhen.
FAQ
Can one mold make both the candle and the soap? Share the artwork and the master family if you want a matched collection. Don't share Shore, split, and wick. Wax and CP soap are different demold and chemistry problems.
Do I always need a split mold for pillars? No. If the texture and draft let you peel without tearing, a one-piece can be the simpler tool. Deep negative draft and two-sided sculpture usually want a keyed split with a planned seam.
Why did my wax melt pack come in under weight? The cavity was drawn as a shape, not as a fill volume. Send target grams, wax type, and pieces per clamshell before we cut the master.
Will fragrance oils wreck the silicone? Repeated oil and aggressive cleaning change mold life. Tell us the wax and fragrance system; we pick grade and a cleaning note from that, not from a generic “candle silicone” label.
When is a different RFQ - ask us the right quote? When you're buying a molded silicone *article* (or steel tooling to make it) rather than a cavity to pour wax or soap into. RUUIPON stays on the RTV mold side of that split.