PU Coating and Silicone Keypads

03 Nov, 2023

By hqt

Does PU Coating Affect a button on your remote control or keyboard and felt the smooth, supple texture underneath your fingertips? That sensation is often due to the silicone material used in the keypad’s design. But have you ever wondered if the coating on top of those keypads affects the way they feel? Enter PU coating—a widely used protector in the world of electronics. Let’s dive deeper into this fascinating intersection of technology and touch sensation.

Understanding PU Coating and Silicone Keypads

Before we delve into the heart of the matter, it’s essential to comprehend the fundamentals of these two components.

What is PU Coating?

PU, or polyurethane, is a type of protective coating applied to various surfaces to provide a barrier against environmental conditions like moisture, dust, and physical wear. In the world of electronics, PU coatings play a pivotal role in ensuring the longevity of devices by guarding them against daily wear and tear.

Silicone Keypads: An Overview

Silicone keypads are popular in electronic devices due to their resilience, flexibility, and pleasant tactile feedback. They’re known for their soft feel and durability, making them a favorite among device manufacturers.

The Relationship Between PU Coating and Silicone Keypads

So, why would anyone want to put a coating on something that’s already efficient and user-friendly?

Purpose of Applying PU Coating on Silicone Keypads

The primary reason is protection. While silicone is durable, it’s not immune to the effects of prolonged exposure to certain elements. A PU coating serves as an extra layer of defense, safeguarding the keypad from spills, dirt, and even UV rays.

Potential Changes in Feel and Functionality

But here’s the million-dollar question: Does this protective layer compromise the soft, responsive feel that users love about silicone keypads?

Effects of PU Coating on Keypad Touch

Positive Impacts

  1. Durability: PU coating undoubtedly increases the lifespan of silicone keypads. By shielding them from environmental factors, they’re less likely to degrade over time.
  2. Cleanliness: The protective layer makes it easier to clean the keypad, maintaining its aesthetic appeal and hygiene.

Potential Downsides

  1. Tactile Sensation: Some users report a slight difference in the touch sensation when a PU coating is applied, describing it as less “grippy” or slightly stiffer.
  2. Response Feedback: In some cases, the coating can reduce the tactile feedback, making keys feel less responsive.

Real-life Examples

Instances Where PU Coating Enhanced Keypad Experience

Many high-end electronic devices, like premium remote controls or specialized equipment, utilize PU coated keypads to ensure a longer lifespan without compromising too much on touch experience.

Situations Where it Didn’t Work as Expected

However, there have been instances, particularly in cheaper gadgets, where the coating was poorly applied, resulting in an unsatisfactory user experience, with keypads feeling rigid or unresponsive.


In essence, while PU coatings offer enhanced protection for silicone keypads, they might slightly alter the tactile experience. The impact largely depends on the quality and application method of the coating. As with anything, there’s a balance to strike—between protection and pure tactile pleasure.


  1. What is the main purpose of PU coating on silicone keypads?
    • It’s primarily used to protect the keypad from environmental factors and prolong its lifespan.
  2. Do all electronic devices with silicone keypads use PU coatings?
    • No, not all devices use PU coatings, as it depends on the manufacturer’s preference and the device’s intended use.
  3. Can the PU coating be removed if I don’t like the feel of it?
    • It’s challenging to remove PU coatings without damaging the underlying silicone. It’s best to check with the device manufacturer or a professional.
  4. Is there a significant cost increase for devices with PU-coated keypads?
    • Generally, the cost increase is minimal, but it can vary based on the quality and brand of the device.
  5. Are there alternatives to PU coating for silicone keypad protection?
    • Yes, there are other types of coatings and treatments, but PU is among the most popular due to its effectiveness and affordability.

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