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Membrane Seals

TPU Waterproof, Breathable, Sound Permeable Membrane - 28mm


TPU or thermoplastic polyurethane is a semi-rigid, waterproof material that can act as a breathable membrane for devices. It's a porous material that allows the exchange of air through it, but has pores small enough that water molecules cannot penetrate it. TPU is a more rigid material than ePTFE and maintains it's shape better. It's also less fragile and retains its shape and properties better. It's commonly used in athletic shoes to make them watertight yet breathable.

TPU is commonly used in waterproof mobile phones to protect the microphone and speakers from moisture. TPU membranes are a good way to keep your microphones and speakers dry in your field devices while still allowing sound to pass through. They're also a good choice if you need to keep your field devices dry and watertight, yet still need to allow air to circulate.

This TPU membranes seal is 28mm in diameter. The actual membrane portion is 0.15mm thick.

  • Shipping Weight: 0.01kg

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