A wearable that survives a swim and an outdoor sensor that shrugs off a rainstorm both depend on the same thing: a housing that keeps water and dust out reliably, unit after unit. Achieving that at production volume is a demanding blend of sealing design, material choice, and precise molding. Meeting IP67 and IP68 sealing targets is often what separates a rugged, trusted device from one that fails in the field, and it has to be built into the parts from the start. As an experienced Taiwan mold maker, INTERTECH produces the sealed enclosures and seals that let wearable and IoT developers hit these ratings.
INTERTECH does not brand its own devices. It molds the plastic and silicone parts, and builds the tooling, for the companies that develop sealed wearables and outdoor IoT products. With more than 30 years of experience and 100% made-in-Taiwan capability, it brings sealing know-how, silicone molding, and precision tooling together to make ingress protection repeatable.
What IP67 and IP68 Actually Require
Ingress-protection ratings describe how well an enclosure resists solids and liquids. The first digit covers dust, and a rating of 6 means the enclosure is dust-tight. The second digit covers water: 7 means protection against temporary immersion, and 8 means protection against continuous immersion under conditions specified by the manufacturer. For wearables and outdoor IoT devices, these ratings translate into real expectations, such as surviving sweat, rain, washing, or submersion, and meeting them consistently at volume depends on how the parts are designed and molded, not on a coating applied at the end.
Sealing Strategies for Sealed Enclosures
Several proven approaches keep water and dust out, and the right one depends on the device, its size, and whether it must be opened later. A capable partner chooses among them rather than forcing one method on every product.
- Compressed gaskets and O-rings seated in designed grooves, giving a serviceable seal on housings that may be opened.
- Overmolded silicone seals bonded directly to a rigid part, creating a durable, seamless barrier with no separate gasket to shift.
- Two-shot molding that integrates a soft sealing surface into a rigid housing in a single automated cycle.
- Bonded or welded joints that permanently close a housing where no future access is needed.
- Sealed membranes and vents that block liquid while allowing pressure equalization for sensors and microphones.
Materials and Tooling for Reliable Sealing
A seal is only as good as the material it is made from and the surfaces it presses against. Liquid silicone rubber is a common sealing material for wearables and IoT devices because it stays flexible, resists compression set, tolerates temperature swings, and holds contact pressure over long service. Just as important, the mating surfaces on the housing must be molded flat, smooth, and dimensionally stable, because a sealing face that warps or varies from part to part will leak. Well-designed tooling with controlled cooling and gate placement produces the consistent sealing surfaces that ingress protection depends on.
Designing Openings, Buttons, and Ports
Most sealing failures occur not on flat walls but at the places a device must interrupt its own shell: buttons, ports, sensors, and seams. Each opening is a potential leak path and must be sealed deliberately. Buttons can be sealed with an overmolded soft skin, ports can be recessed and gasketed or eliminated in favor of wireless charging, and seams can be closed with a continuous gasket groove or an overmolded lip. Because these features affect both sealing and moldability, they are best resolved during design review, with the molder’s input, so protection is designed in rather than patched on.
One-Stop Production from a Single Taiwan Partner
Reliable sealing needs rigid-plastic molding, silicone molding, and precise tooling working together, which is difficult to coordinate across separate vendors. INTERTECH keeps it under one roof in Taiwan: DFM feedback, prototyping and pilot molds, mold making including two-shot and insert tooling, plastic injection molding, silicone rubber molding, overmolding, metal stamping, and molding with assembly. One partner can therefore mold the housing, mold or overmold the seals, and assemble the sealed device, taking responsibility for how the whole enclosure keeps water and dust out.
What Buyers Should Evaluate
- Confirm in-house silicone molding and overmolding capability for reliable seals, not just rigid molding.
- Verify experience designing enclosures to meet IP67 or IP68 sealing targets.
- Ask how the partner seals buttons, ports, sensors, and housing seams.
- Check that tooling produces flat, stable sealing surfaces consistently across long runs.
- Assess whether DFM feedback addresses sealing geometry before the tool is cut.
- Review the supplier’s track record on sealed wearables and outdoor IoT devices.
Conclusion
IP67 and IP68 sealing is achieved through deliberate design of seals and sealing surfaces, the right flexible materials, and precise molding, all applied consistently at production volume. Openings such as buttons and ports demand particular care, and a partner that molds both the rigid housing and the soft seals is best placed to make protection repeatable. If you are looking for a reliable injection mold maker in Taiwan for IP67 and IP68 sealing of your wearables or outdoor IoT devices, please contact INTERTECH to discuss your drawings, materials, and production requirements.
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