48-Pack EPTFE 20mm Waterproof Breathable Membrane Stickers

48-Pack EPTFE Waterproof Breathable Membrane Stickers – 20mm

Keep your electronics, sensors, and sensitive components protected with these premium EPTFE (Expanded PTFE) Waterproof Breathable Membrane Stickers. Engineered from advanced microporous material, each 20mm sticker forms an invisible yet highly effective barrier against water, dust, and corrosive liquids — while still allowing air and heat to pass freely. Perfect for engineers, hobbyists, and manufacturers looking for a reliable, low-profile protection solution.

Key Features

• Superior Waterproofing: Micropores measuring 0.1–1.0 µm in diameter are up to 10,000× smaller than a water droplet, creating an impenetrable barrier against moisture and liquid ingress without sealing off airflow.
• Excellent Air Permeability: Micropore diameter is approximately 700× larger than water vapour molecules, allowing heat to dissipate efficiently, preventing internal fogging, and balancing pressure between the inside and outside of an enclosure.
• Effective Dust Filtration: The three-dimensional microporous network captures particles as small as 0.1 micron, keeping fine dust and contaminants away from sensitive parts.
• Pressure Equalisation: Actively balances internal and external air pressure, preventing seal stress and protecting enclosure integrity over time.
• Chemical & UV Resistance: EPTFE exhibits strong chemical inertness and resists UV degradation, making these stickers suitable for demanding indoor and outdoor environments.
• Instant Water Recovery: Air permeability is quickly restored even after contact with water, oil, or other liquids — keeping ventilation consistent.
• Thin & Discreet Design: Lightweight, low-profile adhesive stickers integrate seamlessly into product designs without adding bulk.

Product Specifications

What's in the Box?

• 48 × 20mm EPTFE Waterproof Breathable Membrane Stickers

Common Applications

• PCB enclosures and waterproof electronics housings
• LED lights and outdoor lighting fixtures
• Automotive sensors and control modules
• IoT devices and smart home hardware
• Outdoor cameras and security systems
• Medical equipment ventilation ports
• Wearable devices and fitness trackers

For more DIY electronics and components, explore our 0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits and 1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino.

For more information on PTFE materials and their industrial applications, visit the National Institute of Standards and Technology (NIST).

Frequently Asked Questions

Q: What is EPTFE and why is it used in waterproof breathable membranes?

A: EPTFE stands for Expanded Polytetrafluoroethylene. It is a high-performance polymer processed to create billions of microscopic pores. These pores are small enough to block liquid water and dust particles while remaining large enough to allow air and water vapour to pass through freely — making it ideal for protecting electronics and other sensitive components.

Q: Can these membrane stickers be used outdoors?

A: Yes. The EPTFE material offers strong UV resistance and chemical inertness, making the stickers well-suited for outdoor applications such as exterior lighting, outdoor cameras, automotive sensors, and weatherproof enclosures.

Q: How are the stickers applied?

A: Each sticker features a pressure-sensitive adhesive backing. Simply peel and apply over ventilation holes or ports on your device or enclosure. Ensure the surface is clean and dry before application for the best adhesion.

Q: Will the breathability be affected after getting wet?

A: No. One of the key advantages of EPTFE membranes is that their air permeability is quickly restored after contact with water, oil, or other liquids. The membrane continues to function normally once the liquid has drained or evaporated.