Waterproof Keypad User Interfaces

At Epec, we have worked on a wide variety of applications including marine environments and consumer electronics where the user interface is exposed to water or liquid solvents. In these situations, it is critical that the electronic components are completely sealed from any outside containments that could damage the built in electronics.

Do you know if a membrane switch keypad can be waterproof?

When developing a product that needs to be exposed to constant water, like a control panel on a boat or an underwater application, you need to make sure you select the correct supplier that can manufacture to these strict requirements. Choosing a "One Source – One Solution" company like Epec ensures that your complete user interface assembly is being built to meet these environmental requirements.

At a Glance: Waterproof Keypad User Interfaces

• Waterproof keypad user interfaces are engineered to protect internal electronics from water, saltwater, UV exposure, and other environmental contaminants in demanding marine and outdoor applications.
• Custom sealing methods, including molded silicone rubber boots, sealed switch domes, and protective potting compounds, help create fully enclosed and environmentally resistant user interface assemblies.
• Epec delivers complete waterproof HMI assemblies with integrated electronics, tactile switches, and custom mechanical features through a single-source design and manufacturing approach.

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Waterproof Control Panel Construction

The below example illustrates the key factors involved in manufacturing a fully waterproof user interface assembly.

• Having a molded silicon rubber boot wrapped around the edges of the electronics provides the best water-proof seal when mounted. This seal needs to be fully protective of UV, water, salt water, and even gasoline resistant if exposed to these types of containments.
• The rear side of the printed circuit board needs to be completely protected with a potting epoxy so the keyboard is completely sealed prior to and after it has been mounted in the end application.
• Gold plated stainless steel domes are recommended to provide the best tactile sensation for the end user and offer stable, long-term reliability for the end product.
• The switch domes must be environmentally sealed to prevent any airborne contamination from entering the switch dome cavities.
• A custom molded silicone rubber boot can be added to actuate the dome switches. This can contain multi-level features and textures to blend into the look of your finished product.

See our Marine Specifications page for more information.

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Frequently Asked Questions

Quick Links

• Can a membrane switch keypad be waterproof?
• What features help make a keypad user interface waterproof?
• Are waterproof keypad assemblies suitable for marine environments?
• Why are gold-plated stainless steel domes used in waterproof interfaces?
• Can waterproof user interfaces include custom button shapes and tactile features?

Can a membrane switch keypad be waterproof?

Yes. A membrane switch keypad can be designed to be waterproof when the appropriate sealing materials, construction methods, and environmental protection features are incorporated into the user interface assembly.

What features help make a keypad user interface waterproof?

Waterproof user interfaces typically utilize molded silicone rubber seals, environmentally sealed switch domes, protective potting compounds, and carefully designed enclosure interfaces to prevent water and contaminants from reaching sensitive electronics.

Are waterproof keypad assemblies suitable for marine environments?

Yes. Waterproof keypad assemblies can be designed for marine applications where exposure to water, saltwater, UV radiation, and other harsh environmental conditions is expected. Material selection and sealing methods are tailored to the operating environment.

Why are gold-plated stainless steel domes used in waterproof interfaces?

Gold-plated stainless-steel domes provide reliable electrical performance, long-term durability, and a crisp tactile response. They also offer stable operation in demanding environments where reliability is critical.

Can waterproof user interfaces include custom button shapes and tactile features?

Yes. Custom molded silicone rubber boots can incorporate unique button geometries, multiple height levels, textures, and other tactile features while maintaining the environmental seal and supporting the desired appearance of the finished product.

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Need A Waterproof Keypad?

Partner with Epec for your fully-sealed user interface assemblies. One source, one solution, built to withstand water, salt, UV and more.

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