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1. Waterproof performance of polyester fiber sound-absorbing board

Not waterproof:

Polyester fibers themselves have a porous structure, and water can directly penetrate into the interior, causing the board to expand, deform, and even mold.

If immersed in water for a long time or frequently exposed to water (such as in bathrooms or outdoors), it will seriously damage the sound absorption effect and structural strength.

Has certain moisture resistance:

High quality products undergo hydrophobic treatment and can resist humid air for a short period of time (such as environments with humidity ≤ 80%).

Suitable for ordinary indoor spaces such as living rooms, offices, conference rooms, etc.

2. Response plan for damp/water stained environments

Slight splashing (such as tea or rainwater):

Immediately use a dry cloth to absorb moisture and keep it ventilated to dry.

Avoid repeatedly wiping with a damp cloth to prevent water from seeping into the interior.

High humidity environment (basement, poolside):

Choose aluminum honeycomb composite polyester board (with stronger moisture-proof and waterproof performance).

Add moisture-proof film during installation and use keel overhead to avoid direct wall sticking.

Complete waterproof requirements (bathroom, kitchen):

Use PVC sound-absorbing panels or metal perforated panels (100% waterproof, easy to clean) instead.

3. How to improve the water resistance of polyester fiberboard? ‌

Surface spraying waterproof agent:

The use of nano hydrophobic spray (such as automotive glass waterproof agent) can reduce the penetration of water stains.

Attention: Spraying may slightly affect the sound absorption effect, and testing is required before construction.

Edge sealing treatment:

Seal the joints of the board with waterproof adhesive (such as silicone) during installation to prevent water from entering from the edges.

4. Comparison of waterproofing between polyester fiber and other sound-absorbing materials

5. Important precautions

Not washable:

Polyester fiber sound-absorbing panels cannot be washed with water, and only a vacuum cleaner or dry cloth can be used for cleaning.

Mold risk:

If left untreated for a long time due to moisture, even if the surface is dry, mold may still grow inside (requiring regular inspection).

Conclusion

Polyester fiber sound-absorbing panels are not waterproof and only have basic moisture resistance, suitable for dry or generally humid indoor environments. If waterproofing is required, it is recommended to choose PVC or aluminum honeycomb composite panels and strictly implement moisture-proof measures during installation!