


Product Introduction: This waterproof breathable membrane is designed as a protective layer for building insulation. It strengthens air and water tightness while allowing vapor to discharge quickly. This ensures energy efficiency, improves building durability, and maintains indoor air quality by keeping external walls and roofs dry.
Laid on the surface of the insulation layer, it covers the whole building. Its unique non-confined pores and wind resistance reduce air leakage and heat loss, significantly protecting the insulation layer. Studies show that buildings using this membrane can save up to 40% in heating and cooling energy costs.
Offers superior resistance against water vapor and rain. It improves the durability of the building structure and ensures thermal insulation efficiency. Test results indicate its heat preservation effect is remarkable, equivalent to twice the thermal resistance of an air layer of the same thickness.



With vapor permeability above 1000g/m²·day, it effectively discharges internal water vapor to reach a natural dry state. This prevents mold breeding, protects the insulation layer, and solves dampness issues, making the living environment more comfortable.
By protecting the thermal insulation layer directly and effectively, it eliminates the need for additional protective layers or steam exhaust measures, significantly reducing overall project costs.
The membrane operates on the principle of micro-porous vapor permeation. While water droplets are approximately 20 microns in diameter, water vapor molecules are only about 0.0004 microns. The vapor can pass through the micro-holes via diffusion, while liquid water is blocked by surface tension.
| Test Item / Unit | HD-K100 | HD-K120 | HD-K140 | HD-KZ160 | Test Method |
|---|---|---|---|---|---|
| Water Vapor (g/m².24h) | 1000-2500 | 1000-2500 | 1000-2500 | 1000-2500 | GB/T 17146-1997 |
| Water Tightness (mm) | 1500-3000 | 1500-3000 | 1500-3000 | 1500-3000 | GB/T 328.10-2007 |
| Breaking Strength (N/50mm) | ≥100 | ≥120 | ≥180 | ≥260 | GB/T 328.9-2007 |
| Breaking Elongation (%) | ≥40 | ≥40 | ≥70 | ≥70 | GB/T 328.9-2007 |
| Feature | Specification | Test Method |
|---|---|---|
| Inflaming Retarding | B2 | GB/T 8626-2007 |
| UV Resistant (Month) | 4 Months | Standard Test |