Explainers · 2026-06-25 · ~1,300 words
Patreon for mold making creators: silicone Shore A selection, platinum inhibition, casting documentation, iOS rates, and the Apple Tax in 2026
Mold making creator Patreons retain when they document the material-specific decisions that cannot be recovered from video alone: Shore A selection rationale for this master geometry, inhibition testing results by material and product, and the degassing and pour sequence that produces bubble-free results in a specific studio environment. Mold making audiences span desktop-primary technical practitioners and mobile-primary discovery viewers — Apple Tax exposure begins November 1, 2026.
Creator types and tier structure
Silicone mold makers for resin casting
Tier structure: Studio ($8–12/month, project posts, process photographs, Discord, monthly Q&A), Mold Notes ($15–20/month, full mold documentation — master material and surface preparation, silicone selection with Shore A rationale for this geometry, mixing documentation with degassing protocol, cure conditions observed, demolding assessment, casting material used), Production ($25–40/month, Mold Notes access plus production casting documentation covering casting count to dimensional accuracy failure, maintenance between pours, and full casting material notes including pot life management and release agent selection).
The Mold Notes documentation accumulates into a reference library: a patron who follows twelve projects across different geometry types builds a calibrated understanding of Shore A selection across the geometry space that is not available from any product selector tool or published guide.
Wax and soap mold makers
Tier structure: Maker ($8–12/month, project posts, Discord), Craft Notes ($15–20/month, mold documentation for each product — silicone selection and Shore A rationale for the specific candle or soap form geometry, pour temperature and technique for the casting material, demold timing at ambient temperature, surface release quality assessment), Consultation ($30–50/month capped 8–10, written diagnosis of patron mold problems from submission protocol including form photographs and process description).
Wax and soap mold making has specific material requirements that differ from resin casting: food-safe compliance for soap molds, wax pour temperature effects on silicone degradation over time, and the specific Shore A range that balances easy demolding for tall pillar candle forms against the sag that occurs in very soft silicones when filled with warm wax.
Prop and sculpture mold makers
Tier structure: Workshop ($12–18/month, project posts, Discord, technique posts organized by application), Technical Notes ($20–30/month, complete mold documentation including shell mold construction for large forms, brush-up technique for complex geometries, mother mold construction for supported pour molds), Review ($40–60/month capped 6–8, critique of patron mold problems with detailed technical diagnosis).
Shore A durometer selection documentation
Shore A durometer selection is the most consequential material decision in silicone mold making because it determines the balance between demolding flexibility and dimensional stability across multiple pours. The selection rationale for each project is the documentation that produces patron value because the correct Shore A for a specific geometry cannot be derived from product datasheets alone — it requires understanding the relationship between geometry complexity, undercut depth, and casting material stiffness.
Shore A 15–20 (very soft): appropriate for masters with significant undercuts — areas where the casting material would lock into a stiffer mold and require the mold to flex substantially during demolding. Specific applications: sculptures with thin protrusions (hair, branches, thin fingers) where a stiffer mold would tear or deform the protrusion during demolding; forms with deep blind recesses where the mold must compress to release; rubber-like casting materials (flexible polyurethane, soft wax) that have their own demolding compliance and can use a stiffer mold, but where the master geometry has undercuts that require mold flexibility. Tradeoff: very soft silicone sags when used in open-face pours without a supporting mother mold, reducing dimensional accuracy of the casting top surface.
Shore A 25–35 (standard range): the workhorses of mold making — firm enough to hold dimensional accuracy across 20–50+ pours for most geometries, flexible enough to release normally-undercut forms without tearing. Most decorative resin casting, soap and candle forms without extreme geometry, jewelry models, and flat-to-shallow relief forms fall in this range. Documentation should specify where in the 25–35 range was chosen and what geometric or material property drove the specific selection (a 30A for standard jewelry versus a 35A for higher-production flat rings where dimensional stability matters more than demolding flexibility).
Shore A 40–50 (firm): highest dimensional accuracy for forms without significant undercuts — appropriate for production tooling, flat jewelry or tile forms where accuracy across many pours matters, and two-part molds where the parting line registration is critical. Food-safe silicones for confectionery are often in this range for flat chocolate or fondant molds. Tradeoff: stiffer silicone tears more easily if an undercut is present that was not accounted for in the mold design.
Platinum inhibition: identification, testing, and resolution
Platinum-catalyzed (addition-cure) silicone — the standard for professional mold making due to low shrinkage and long shelf life — inhibits in contact with specific materials, producing a permanently tacky surface rather than a cured one. Inhibited silicone cannot be corrected; the affected batch must be discarded. Documentation of inhibition testing results and sealing solutions is among the highest-value content a mold making creator can produce because it translates specific product-level test results into actionable guidance.
Inhibiting material categories: sulfur-containing modeling clays (original-formula professional clays — test each brand and product line by lot before use; sulfur-free alternatives exist for most but must be confirmed); condensation-cure (tin-cure) silicone cured surfaces (using tin-cure as a sealer coat beneath platinum-cure is inhibiting); natural latex; sulfur-vulcanized rubber; some epoxy formulations; organometallic compounds in some release agents.
Testing protocol: apply a coin-sized amount of Part A only (catalyst) to a sample of the master material or material type at ambient temperature; allow to cure for the manufacturer's specified full cure time; attempt to peel — if it releases clean and fully cured, the material is safe for direct contact with platinum silicone. If it remains tacky after full cure time plus 50%, the material inhibits and must be sealed before pouring.
Sealing approaches: shellac applied as a 2–3 coat brush application (2 lb cut), each coat fully dried before the next, followed by 24 hours before pouring silicone; clear spray lacquer (2–3 thin coats, each fully dried) effective for most sulfur-containing clays; Krylon Crystal Clear or equivalent as a spray sealer with shorter dry time between coats. Document by product name and lot which sealer resolved the inhibition for which master material — this level of specificity is the documentation that distinguishes a creator's notes from a general chemistry guide.
Apple Tax for mold making creator audiences
Mold making creator iOS rates: YouTube tutorial content, 50–65% iOS; YouTube production and commercial mold making, 40–55% iOS; Instagram mold making and casting results, 70–80% iOS. A mold making educator at $400/month with 58% iOS faces approximately $69.60/month ($835/year) in Apple fees beginning November 1, 2026. Enable Patreon's web-only billing toggle before October 31, 2026 and update all platform links to the Patreon web URL.
KeepTier is a self-hosted membership page for creators who want 100% of their tier revenue and zero Apple tax. Plans start at $9/month.