Why Do Rubber Keypad Need Surface Treatment with PU Oil?

08 Jun, 2023

By hqt


When it comes to rubber keypads, surface treatment with PU oil is an essential step in the manufacturing process. This treatment not only enhances the appearance of the keypad but also provides several functional benefits. In this article, we will explore the reasons why rubber keypads require surface treatment with PU oil and the advantages it offers. So, let’s dive in!

Why Do Rubber Keypad Need Surface Treatment with PU Oil?

Enhanced Durability

Rubber keypads are prone to wear and tear due to constant usage and exposure to environmental factors. Surface treatment with PU oil forms a protective layer that enhances the durability of the keypad. The oil acts as a barrier, shielding the keypad from moisture, dirt, and other contaminants that could potentially damage its surface. By ensuring long-lasting performance, surface treatment with PU oil extends the lifespan of rubber keypads.

Improved Tactile Feel

A rubber keypad’s tactile feel is crucial for user experience, especially in applications like remote controls, keyboards, and industrial equipment. Surface treatment with PU oil provides a smooth and consistent texture, enhancing the tactile feedback of the keypad. The oil’s thin layer adds a subtle softness to the surface, making it comfortable to touch and press the keys. This improved tactile feel ensures a satisfying user interaction with the rubber keypad.

Resistance to Fading and Discoloration

Exposure to UV radiation and other external factors can cause rubber keypads to fade or discolor over time. Surface treatment with PU oil includes UV stabilizers that protect the keypad from the harmful effects of sunlight, preventing fading and discoloration. This treatment ensures that the rubber keypad maintains its vibrant and attractive appearance throughout its lifespan, making it ideal for various consumer electronic devices.

Increased Chemical Resistance

Rubber keypads often come into contact with various chemicals, such as cleaning agents, solvents, or oils. Surface treatment with PU oil provides chemical resistance, preventing the rubber from deteriorating when exposed to such substances. The oil forms a protective barrier that shields the keypad from chemical interactions, ensuring that the keys remain functional and intact even in challenging environments.

Easy Maintenance

Rubber keypads treated with PU oil are relatively easy to clean and maintain. The oil’s hydrophobic properties repel water and prevent it from seeping into the keypad, reducing the risk of damage. Additionally, the smooth surface resulting from surface treatment makes it easier to wipe away dust, dirt, and fingerprints. This low-maintenance characteristic is highly beneficial, especially in devices that are frequently used or exposed to harsh conditions.

Improved Aesthetic Appeal

The surface treatment with PU oil not only provides functional benefits but also enhances the overall aesthetic appeal of rubber keypads. The oil imparts a glossy finish to the surface, making the keys look more visually appealing. This added visual appeal can elevate the perception of the product and contribute to a better user experience. Whether it’s a high-end electronic gadget or an industrial control panel, the sleek and polished look of a surface-treated rubber keypad can make a positive impression on users.

Frequently Asked Questions

Q: Does surface treatment with PU oil affect the keypad’s flexibility?

No, surface treatment with PU oil does not compromise the flexibility of rubber keypads. The oil forms a thin and flexible layer on the surface, allowing the keypad to retain its original flexibility and tactile response.

Q: Is surface treatment with PU oil environmentally friendly?

Yes, surface treatment with PU oil is considered environmentally friendly. The oil used in the process is non-toxic and does not contain harmful substances like heavy metals or volatile organic compounds (VOCs). Additionally, the treatment ensures the longevity of rubber keypads, reducing the need for frequent replacements and minimizing waste.

Q: Can surface treatment with PU oil be applied to different types of rubber keypads?

Yes, surface treatment with PU oil is suitable for various types of rubber keypads, including silicone rubber keypads, elastomer keypads, and conductive rubber keypads. The treatment is compatible with different formulations of rubber, making it a versatile solution for keypad manufacturers.

Q: How long does the surface treatment with PU oil last?

The longevity of surface treatment with PU oil depends on several factors, including usage conditions and environmental exposure. However, when applied correctly, the treatment can last for several years, ensuring the durability and performance of rubber keypads over an extended period.

Q: Can I apply surface treatment with PU oil to an already manufactured rubber keypad?

Surface treatment with PU oil is typically performed during the manufacturing process of rubber keypads. It requires specialized equipment and expertise to achieve optimal results. Applying the treatment to an already manufactured keypad may not yield the desired outcome and could affect the keypad’s performance.

Q: Are there any alternatives to surface treatment with PU oil for rubber keypads?

While surface treatment with PU oil is a widely adopted method, there are alternatives available for specific applications. Some alternatives include surface coating with other materials like silicone or epoxy, depending on the desired properties and requirements of the rubber keypad.


Surface treatment with PU oil plays a vital role in enhancing the functionality and appearance of rubber keypads. From improving durability and tactile feel to providing resistance against fading, discoloration, and chemicals, the benefits of this treatment are manifold. Manufacturers of rubber keypads rely on surface treatment with PU oil to ensure their products meet high-quality standards and deliver an exceptional user experience.


Write to Us And We Would Be Happy to Advise You.

    l have read and understood the privacy policy

    Do you have any questions, or would you like to speak directly with a representative?