High-End Silicone Consumer Products
Inventors and engineers rely on Rilong Molding for silicone injection molding applications that require innovation and attention to detail.
Silicone Over-Molding
Silicone Over-molding: Beyond Traditional Plastic Over-molding
While over-molding is commonly associated with plastic materials like PC/ABS, TPE, or TPU, silicone over-molding offers far greater versatility and performance advantages. At RIlong, we specialize in advanced silicone over-molding solutions, including LSR (Liquid Silicone Rubber) over-molding and compression-molded silicone over-molding, to meet the most demanding applications across industries.
Why Choose Silicone Over-molding?
Silicone over-molding provides superior sealing, extreme temperature resistance, and unmatched flexibility while bonding securely to metals, plastics, and even other silicone components. Here’s how we deliver exceptional results:
1. Silicone-to-Metal Over-molding
✔ Applications: Automotive seals, industrial corrosion-resistant parts, medical implants
✔ Key Benefits:
Strong adhesion to stainless steel, aluminum, and other metals
Withstands harsh chemicals, UV exposure, and extreme temperatures
Enhances vibration damping and product longevity
2. Silicone-to-Plastic Overmolding
✔ Applications: Consumer electronics (waterproof buttons, ergonomic grips), medical devices
✔ Key Benefits:
Reliable bonding with ABS, PC, nylon, and other engineering plastics
Improves grip, shock absorption, and IP-rated sealing
Ideal for lightweight, high-precision designs
3. Silicone-to-Silicone Over-molding
✔ Applications: Multi-durometer seals, soft-touch grips, medical components
✔ Key Benefits:
Seamless bonding of different Shore hardness levels (10A–80A)
Complex geometries (thin walls, undercuts, micro-features)
4. Silicone with Membrane Switches
✔ Applications: Automotive dashboards, medical control panels, industrial HMIs
✔ Key Benefits:
Integrated tactile switches with IP67+ sealing
Improved durability over traditional adhesive assemblies
Custom backlighting options (LED integration)
✔ Applications: Automotive seals, industrial corrosion-resistant parts, medical implants
✔ Key Benefits:
Strong adhesion to stainless steel, aluminum, and other metals
Withstands harsh chemicals, UV exposure, and extreme temperatures
Enhances vibration damping and product longevity
2. Silicone-to-Plastic Overmolding
✔ Applications: Consumer electronics (waterproof buttons, ergonomic grips), medical devices
✔ Key Benefits:
Reliable bonding with ABS, PC, nylon, and other engineering plastics
Improves grip, shock absorption, and IP-rated sealing
Ideal for lightweight, high-precision designs
3. Silicone-to-Silicone Over-molding
✔ Applications: Multi-durometer seals, soft-touch grips, medical components
✔ Key Benefits:
Seamless bonding of different Shore hardness levels (10A–80A)
Complex geometries (thin walls, undercuts, micro-features)
4. Silicone with Membrane Switches
✔ Applications: Automotive dashboards, medical control panels, industrial HMIs
✔ Key Benefits:
Integrated tactile switches with IP67+ sealing
Improved durability over traditional adhesive assemblies
Custom backlighting options (LED integration)
LSR vs. Compression Silicone Overmolding: Which is Right for You?
| Factor | LSR Over-molding | Compression Silicone Over-molding |
| Precision | Ultra-fine (±0.05mm), ideal for micro-features | Good (±0.2mm), better for larger parts |
| Cycle Time | Fast (30–90 sec) – high-volume production | Slower (5–15 min) – suited for prototypes/small batches |
| Material Options | Wide range of LSR grades (medical, FDA, etc.) | Limited to solid silicone rubbers |
| Cost Efficiency | Lower per-part cost at scale | Lower tooling cost for simple designs |
Example Applications:
LSR: Medical catheters, wearable sensors, precision seals
Compression: Large gaskets, industrial seals, kitchenware
LSR: Medical catheters, wearable sensors, precision seals
Compression: Large gaskets, industrial seals, kitchenware
Our Advanced Over-molding Capabilities
✅ Multi-Material Expertise: Bond silicone to metals, plastics, or PCBs
✅ Clean room Molding: ISO Class 8 for medical/electronics
✅ Custom Formulations: Conductive, high-thermal, or optically clear silicone
✅ Full Validation: Material adhesion testing, fatigue resistance checks
Industries Served:
Medical: Implants, drug delivery devices, surgical tools
Automotive: Seals, connectors, battery housings
Electronics: Waterproof enclosures, tactile keypads
Industrial: Chemical-resistant seals, durable grips
Medical: Implants, drug delivery devices, surgical tools
Automotive: Seals, connectors, battery housings
Electronics: Waterproof enclosures, tactile keypads
Industrial: Chemical-resistant seals, durable grips
Partner with Silicone Over-molding Specialists
At Rilong, we combine 30+ years of injection molding expertise with 20+ years in silicone manufacturing to deliver:
✅ Design-for-Manufacturability (DFM) support
✅ Rapid prototyping to mass production
✅ Guaranteed material compatibility
✅ Design-for-Manufacturability (DFM) support
✅ Rapid prototyping to mass production
✅ Guaranteed material compatibility