Bonding Soft Silicone
to Precision Metal
Engineering durable silicone-to-metal composite components for kitchenware, utensils, and lifestyle hardware. Chemical bonding, precision tolerances, and rigorous mechanical testing -- delivered at scale.
Engineered for a
range of metal substrates
We overmold silicone onto virtually any kitchen-grade or hardware metal -- matching the substrate's thermal expansion, surface energy, and finishing requirements for a flawless, lasting bond.
Stainless Steel
304 / 316 food-grade stainless. Ideal for utensil handles, whisk cores, and kitchen tool bodies.
- Food-contact certified
- Dishwasher-safe bond
Aluminum Alloy
6061 / 5052 / 1050 series. Lightweight bakeware frames, trivet cores, and ergonomic grips.
- Anodized compatible
- High thermal transfer
Zinc Alloy
Die-cast zinc for intricate decorative components, drawer pulls, and premium accessories.
- Complex geometry support
- Plating-friendly
Brass & Copper
For premium cookware accents, decorative hardware, and heat-conductive applications.
- Premium finish retention
- Corrosion-protected bond
Also compatible with titanium, carbon steel (with coating), and surface-plated substrates. Request a compatibility review with your material specification.
The invisible work that
makes the bond last.
A reliable overmold begins long before injection. We prepare each metal insert through multi-stage cleaning, surface activation, and primer application -- then position it precisely in the mold cavity with custom fixtures.
Degreasing & Ultrasonic Cleaning
Removes machining oils, oxide layers, and contaminants. Three-stage ultrasonic bath with controlled chemistry ensures a chemically clean substrate ready for activation.
Surface Activation
Sandblasting, chemical etching, or plasma treatment -- selected per substrate -- increases surface energy and creates mechanical anchors for the primer layer.
Primer Coating
Food-safe silicone-metal primer applied via spray or dip. Controlled thickness (3-8μm) and curing creates the chemical bridge between dissimilar materials.
Precision Positioning Fixtures
Custom-engineered inserts and mold-side locators hold each metal part within ±0.05mm. Prevents flash, ensures uniform silicone wall thickness, and repeats across every shot.
Full and partial coverage,
matched to your process.
Whether you need a soft grip zone on a stainless handle or a fully encapsulated metal core, we design the tooling, select the right process, and run production on the right machine.
Partial Overmolding
Silicone covers only the grip, seal, or functional zone. Metal remains visible for structural, aesthetic, or thermal purposes.
Full Encapsulation
Metal core is fully sealed inside silicone -- protecting it from moisture, corrosion, and user contact. Common in bakeware and infant utensils.
Multi-Zone Co-Molding
Different silicone hardness or colors in distinct zones over the same metal insert. Enables ergonomic + branding integration.
Compression & Transfer Molding
HTV solid silicone over metal inserts. 32 dedicated machines. Ideal for thicker walls, high-durometer grips, and cost-efficient high volume.
- Shore A 20-80 range
- Pantone color matching
- Textured surface options
LSR Injection Overmolding
Precision liquid silicone injected over metal inserts. 32 LSR lines. Fully automated for complex geometries, thin walls, and medical-grade cleanliness.
- Flash-free cold runner
- Translucent & food-grade
- Fully automated cycles
Bond strength, corrosion
& flawless aesthetics.
Three failure modes we design against -- and the controls that eliminate them batch after batch.
Bond Strength
Chemical cross-linking via primer system creates true molecular adhesion -- not just mechanical interlock.
Corrosion Protection
Full silicone encapsulation seals metal from moisture and salt. Edge-sealing techniques prevent capillary ingress at the interface.
Appearance Control
Clean parting lines, uniform wall thickness, zero flash. Color consistency verified against Pantone master samples.
Trusted across kitchenware
and lifestyle hardware.
Stainless Utensil Handles
Spatulas, ladles, whisks and tongs -- stainless core with ergonomic silicone grip. Heat-resistant to 230°C.
Encapsulated Whisks & Beaters
Stainless wire frames fully overmolded in food-grade silicone. Non-scratch for non-stick cookware.
Trivets & Pot Rests
Aluminum structural core with silicone surface -- heat-safe to 260°C with non-slip grip zones.
Bakeware with Silicone Handles
Carbon steel or aluminum pans with silicone-grip handles. Oven-safe through full baking cycle.
Strainers & Colanders
Stainless mesh with silicone edge-rings and handles. Protects cookware and improves grip comfort.
Drawer Pulls & Lifestyle Hardware
Zinc or brass hardware with silicone accents. Soft-touch premium feel with custom color matching.
Every batch,
tested to fail -- and verified to pass.
We maintain a full in-house testing lab with ISO 9001 procedures. Each production lot is sampled and verified against the agreed engineering specification before release.
Pull-Force Test
Axial tensile load applied to silicone cover until bond failure. Validates separation resistance.
Torque Resistance Test
Rotational force applied to measure resistance to twisting between silicone and metal -- critical for utensil handles.
Functional & Environmental
Thermal cycling (−40°C to 230°C), dishwasher aging, drop impact, and UV exposure. Simulates full product lifecycle.
Submit your
overmolding project.
Share your drawings, metal spec, and target volume. Our engineers will respond within 24 hours with feasibility analysis and tooling estimate.
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Emailedwin@gd-yums.com
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Phone / WhatsApp+86 13418983587