A Waterproof Membrane is a high-performance protective material designed to prevent water infiltration while maintaining excellent breathability. Unlike traditional sealing methods, modern membranes are engineered using expanded PTFE (ePTFE) technology and advanced composites, making them both waterproof and breathable. This dual function is essential in preventing condensation, protecting sensitive electronics, and ensuring long-term durability in various industries.
Whether referred to as a Waterproof Breathable Membrane, Waterproof Venting Membrane, or Waterproof Membrane Disc, these products serve the same purpose: to provide a reliable barrier against liquid water while allowing gases and vapors to pass through, balancing internal and external pressures.

Key Features
Excellent Waterproofing
Provides superior resistance to water penetration, with protection levels ranging from IP65 to IP68.
Prevents rain, snow, and humidity from entering enclosures and damaging internal components.
Breathable Design
Functions as a Waterproof Breathable Membrane, allowing water vapor to escape efficiently.
Prevents condensation and moisture buildup inside sealed enclosures.
Durability in Harsh Environments
Withstands extreme temperatures from -50℃ to 250℃, depending on the model.
Resistant to chemicals, oils, and environmental stressors.
UV and Weather Resistant
Maintains long-term stability under direct sunlight, cold, heat, and high humidity.
Suitable for outdoor, marine, and industrial applications.
Eco-Friendly and Safe
Made from non-toxic and environmentally friendly materials.
Complies with global safety and environmental standards, suitable for sensitive fields such as medical devices.
Customizable
Available in various sizes, thicknesses, and shapes.
The Waterproof Membrane Disc format is widely used for easy installation on electronic devices, sensors, and small enclosures.
Model | Protection level | Air penneability | Color | Thickness | Temmperature Range |
PUW878W | IP65 | 4000-5000ml/cm²/min@7kpa | white | 0.13±0.03 | -50℃~100℃ |
PUW316 | IP66 | 3700-5000ml/cm²/min@7kpa | white | 0.20±0.03 | -50℃~130℃ |
PUW575 | IP66 | 2200-3200ml/cm²/min@7kpa | white | 0.28±0.03 | -50℃~120℃ |
PUW875 | IP66 | 3000-4000mVcm³/min@7kpa | white | 0.24~0.30 | -50℃~130℃ |
PUW317 | IP67 | 2000-3500ml/cml/min@7kpa | white | 0.18±0.03 | -50℃~130℃ |
PUW576 | IP67 | 1000-1500ml/cm²/min@7kpa | white | 0.15±0.05 | -50℃~130℃ |
PUW657 | IP67 | 170-350ml/cm²/min@7kpa | white | 0.08-0.14 | -50℃~100℃ |
PUW867 | IP67 | 1900-2400ml/cmi/min@7kpa | white | 0.15±0.04 | -50℃~130℃ |
PUW871 | IP67 | 400-1000ml/cm²/min@7kpa | white | 0.13±0.03 | -50℃~100℃ |
PUW872 | IP67 | 2000-3000ml/cm²/min@7kpa | black | 0.13±0.03 | -50℃~100℃ |
PUW876 | IP67 | 300-600ml/cm²/min@7kpa | white | 0.09-0.15 | -50℃~150℃ |
PUW302W | IP68 | 2900-3400ml/cm²/min@7kpa | white | 0.02±0.01 | -50℃~250℃ |
PUW310G | IP68 | 100-350ml/cm²/min@7kpa | dark grey | 0.20±0.03 | -50℃~250℃ |
PUW318 | IP68 | 800-1700ml/cm²/min@7kpa | white | 0.20±0.03 | -50℃~130℃ |
The above is part of the product data.If you want to know more information or customize production,please contact with our staff.
Benefits
Protects Sensitive Electronics – Acts as a Waterproof Venting Membrane for sensors, LED lighting, and communication devices.
Prevents Condensation & Corrosion – Balances air pressure and avoids water vapor accumulation inside enclosures.
Improves Sealing Performance – Reduces stress on gaskets and seals by equalizing pressure.
Long-Term Durability – Resistant to environmental degradation, ensuring cost-effective, long-term use.
Applications
Outdoor Lighting – Used in LED outdoor lights, lanterns, and garden lighting systems.
Electronics & Sensors – The ePTFE Waterproof Membrane protects sensors, cameras, and smart devices from water ingress.
Medical Devices – Ensures reliable performance by keeping sensitive instruments moisture-free.
Automotive & Marine – The Waterproof Membrane Disc is widely used in headlights, vehicle sensors, and marine navigation systems.
Solar Energy Systems – Prevents condensation in solar panel enclosures.
Industrial Equipment – Provides protection against chemicals, moisture, and extreme temperature variations.
FAQ
1. What is a Waterproof Membrane?
A Waterproof Membrane is a barrier layer that blocks liquid water but allows vapor to pass, ensuring devices stay dry without trapping condensation.
2. What is the difference between Waterproof Breathable Membrane and Waterproof Venting Membrane?
They are often interchangeable terms. Both describe a membrane that combines waterproofing with breathability. The difference lies in application context: “breathable” emphasizes vapor transmission, while “venting” highlights pressure equalization.
3. What materials are used?
Common options include ePTFE Waterproof Membrane, PVC, and composite fabrics. ePTFE is highly valued for its balance of waterproofing, breathability, and chemical resistance.
4. Can membranes be customized?
Yes. Membranes can be supplied in rolls, sheets, or as Waterproof Membrane Discs, depending on the application. Size, thickness, and air permeability can all be tailored.
5. Where are they used?
From consumer electronics to automotive, medical, and industrial fields, Waterproof Membranes are essential in protecting against water ingress while maintaining air balance.