How to Ensure That Electronic Oral Care Devices Have Good Waterproof Performance

As electronic oral care devices — such as electric toothbrushes, oral irrigators, and tongue cleaners — become more advanced, waterproof performance has become one of the most important factors determining both product quality and user safety. For brands working with OEM/ODM manufacturers, ensuring excellent waterproof design and assembly is key to achieving durability, reliability, and compliance with international standards.

Below, we outline six essential aspects to ensure that your electronic oral care devices meet high waterproofing standards and maintain long-term performance.

Understand the Importance of Waterproof Performance

Electronic oral care devices operate in environments full of moisture, foam, and temperature changes. Without proper sealing, water can easily enter the device housing, causing short circuits, corrosion, and even electric shock hazards.
Ensuring strong waterproof performance not only extends product lifespan but also enhances the brand’s credibility and reduces after-sales maintenance costs.

Aim for IPX7 Certification Standards

When evaluating waterproof quality, IPX7 certification is a globally recognized benchmark. It means the device can withstand immersion in water up to 1 meter for 30 minutes without damage.
For oral care devices used in wet bathroom environments, IPX7-level protection is generally considered the minimum requirement.
Brands should confirm with their manufacturing partners that the final product has passed IPX7 testing according to IEC standards before mass production.

Work with OEMs Experienced in Sealing Technology

Choosing an OEM with expertise in sealing technology is crucial. Advanced OEM sealing technology can significantly improve the waterproof reliability of devices without affecting design aesthetics or assembly efficiency.
Techniques may include ultrasonic welding, double-layer sealing rings, nano waterproof coatings, and one-piece structural molding.
During the selection process, ask your OEM for examples of past waterproof device projects or laboratory test data.

Use High-Quality Materials and Structural Design

Waterproof performance starts at the design stage. Material selection for the outer shell, buttons, and joints should ensure both durability and water resistance.
High-grade ABS or PC materials, silicone sealing rings, and stainless-steel components are preferred for long-term exposure to moisture.
A well-designed structure minimizes gaps and prevents water ingress even after long-term use.

Conduct Comprehensive Waterproof Testing

Beyond the IPX7 standard test, it’s essential to perform a variety of waterproof performance tests under different conditions:

Pressure and vacuum leak testing

Thermal cycling and humidity chamber testing

Long-term soaking and vibration simulations

These tests help identify weaknesses in the sealing process and verify product reliability before mass production.

Continuous Quality Control During Mass Production

Even with a perfect prototype, waterproof consistency can fail during mass production if quality controls are weak.
Work with your OEM to establish strict inspection standards, including random sample IPX7 tests and visual checks of sealing components.
A stable production line with automated sealing and assembly systems ensures repeatable performance across all batches.

Conclusion

To guarantee that your electronic oral care devices have excellent waterproof performance, focus on the combination of smart design, reliable IPX7 certification, and advanced OEM sealing technology.
Partnering with an experienced manufacturer who understands the technical and regulatory requirements of waterproof oral care devices is the best way to deliver safe, durable, and market-competitive products.