Custom RTV Silicone Molding Services
Plasticpartsmfg provides precision Room Temperature Vulcanizing (RTV) silicone molding for functional seals, flexible enclosures, and low-volume production directly from CAD models—delivering production-grade elastomeric parts without costly production tooling.
RTV Silicone Molding for Industrial Applications
RTV silicone molding offers an efficient bridge between initial prototyping and high-investment steel injection tooling. By leveraging master models machined via high-speed CNC or built via high-resolution 3D printing, we create flexible silicone tooling capable of replicating complex undercuts, micro-textures, and fine functional details.
No Hard Tooling Capital
Bypass the five-figure cost and 6-8 week lead times of metal injection molds. Perfect for pre-production field trials and low-volume end products.
Complex Part Demolding
The natural elasticity of silicone tooling allows negative drafts, deep internal ribs, and complex undercuts to demold cleanly without expensive mechanical side-actions.
Authentic Material Behavior
Parts exhibit genuine elastomeric properties: thermal insulation, environmental weatherability, dielectric strength, and tailored rebound performance.
Manufacturing Capabilities
Engineered tolerances and flexible formulations calibrated for verification and functional testing.
| Process | RTV Silicone Casting & Gravity/Vacuum Mold Infill |
| Materials | Room-temperature vulcanizing silicones, elastomeric thermosets |
| Hardness | Shore A 10 through Shore A 80 |
| Typical Tolerance | ±0.20 mm to ±0.50 mm (geometry dependent) |
| Batch Run | Single prototype samples up to 500+ units per mold set |
| Surface Finish | Mirror gloss, SPI EDM finishes, satin, and custom texturing |
| Color Matching | Pantone PMS, RAL, transparent tints, or sample swatch matching |
Hardness & Material Selection
Select an elastomeric tier below to review application compatibility and functional properties:
Soft Range: Shore A 10–30
High ComplianceExtremely flexible with high tensile elongation. Excellent tactile softness and rapid compression recovery under gentle sealing forces.
- ✓ Primary Uses: Soft-touch grips, vibration isolators, bellows, ear tips, delicate seals.
- ✓ Characteristics: Low resistance to deformation, maximum comfort, high dampening.
Typical Project Applications
Engineered silicone components trusted across automotive, electronic, consumer, and diagnostic hardware.
Seals & Custom Gaskets
Engineered sealing solutions for IP-rated electronic enclosures, fluidic manifolds, pneumatic assemblies, and ingress barriers.
Soft-Touch Components
Ergonomic handheld grips, silicone overmolding on metal substrates, pushbuttons, keypad arrays, and tactile switches.
Protective Housings
Shock-absorbing protective sleeves, external camera wraps, optical covers, and industrial sensor isolation sleeves.
Medical & Lab Hardware
Non-implantable clinical device housings, fluid transfer valves, diagnostic fluid caps, and sanitary elastomeric covers.
Design Validation & Fit Check
Fast elastomeric validation prior to capital commitment on high-cavitation Liquid Silicone Rubber (LSR) injection tooling.
Acoustic & Thermal Dampeners
Custom isolator pads, thermally stable gaskets capable of continuous operation up to 200°C, and acoustic decoupling rings.
The Production Workflow
A structured, repeatable molding protocol ensuring tight compliance with technical drawings.
Design Review
Engineers evaluate STEP/STL files for parting geometry, draft angles, wall uniformity, and air evacuation paths.
Master Pattern
CNC machining in aluminum/ABS or ultra-fine SLA 3D printing creates the exact physical master.
Tooling Prep
The master is suspended in a mold box, encased in specialized liquid silicone, degassed, and thermally cured.
Vacuum Casting
Production elastomeric silicone is measured, pigmented, degassed under vacuum, and poured into the cavity.
Demold & QC
Careful manual demolding, precision flash trimming, dimensional check, and optical cosmetic inspection.
Quality Control & Tolerances
Silicone shrinkage and thermal equilibrium are calibrated into the master tooling dimension. Our Shenzhen facility regulates room temperature and vacuum chamber degassing to eliminate internal micro-voids, ensuring uniform durometer, repeatable elongation, and strict adherence to dimensional tolerances.
Post-Cure & Secondary Finishing
To provide parts that integrate seamlessly into your assembly lines, we offer complete in-house finishing services:
Submit Your CAD Files for Quotation
Plasticpartsmfg is equipped to handle rapid silicone prototyping and production-grade low-volume manufacturing. Provide your 3D models and technical specs to receive a comprehensive quote and DFM evaluation within 24 hours.
Start Your RTV Silicone Project
Submit your project requirements below. Our application engineers review parting lines, draft angles, and material selections for every RFQ.