Two material families. Zero compromise.
GPOWER Rouhe® functional films solve problems that traditional materials can't touch — at a fraction of the cost. A Gore-tex-beating waterproof breathable membrane and a passive radiative cooling film that drops surfaces below ambient temperature without a watt of power.
Pick your problem. We have the film.
Both built on nano-porous material science. Both engineered to outperform legacy alternatives at a fraction of the cost.
Waterproof / Breathable / Sound-Permeable Film
High-performance ePTFE alternative for outdoor apparel, electronics protection, tents & footwear. Beats Gore-tex on UV and low-temp at 38% of the price.
Radiative Cooling Film (Passive Daytime Cooling)
Passive cooling that drops surfaces 5–8°C below ambient — zero energy, zero maintenance. For building facades, automotive & outdoor equipment.
Four reasons GPOWER films are replacing legacy materials now
Nano-engineered performance
High surface area, tunable pore structure, and precisely controlled physicochemical properties — not just another commodity film.
Scalable, low-cost production
Domestic manufacturing eliminates import dependency and lead times. Cost structure that makes sense for volume OEM contracts.
Proven by data, not claims
Every spec backed by ASTM-standard testing. We provide samples, joint test plans, and certified datasheets for qualified buyers.
From mountain peaks to city skylines
Real applications where GPOWER functional films change the economics and performance equation.
High-performance jackets & gear
Gore-tex-level waterproofing at 38% of the cost. Better UV, better cold.
See breathable film →
Passive cooling for glass buildings
Drop interior temps 5–8°C without AC. Cut cooling energy 20–40%.
See cooling film →
Vehicle thermal management
Cooler cabins, less AC load, extended EV range in hot climates.
See cooling film →The numbers that make procurement teams switch
GPOWER's waterproof breathable membrane doesn't just match the market leader — it beats it where it matters most, at a fraction of the price.
- Same breathability as Gore-tex Pro — 10,000 g/m²/24h MVTR (ASTM E96).
- 67% better UV resistance — 500h no degradation vs Gore-tex's 300h (ASTM G154).
- -40°C flexibility vs Gore-tex's -25°C limit (ASTM D2137). Extreme-cold ready.
- ~38% of Gore-tex price — ¥20-22/m² vs ¥58/m². Margin you can keep or pass on.
- Sound-permeable too — unique among waterproof membranes. Ideal for speaker/electronics covers.
| Metric | GPOWER Film A | Gore-tex Pro | Japanese Toray | ePTFE typical |
|---|---|---|---|---|
| Breathability | 10,000 | 10,000 | 12,000 | 8,000–12,000 |
| Waterproof | 15,000 mmH₂O | 20,000 | 15,000 | 10,000–20,000 |
| Tensile strength | 35 MPa | 35 MPa | 30 MPa | 20–40 |
| UV resistance | 500h | 300h | 250h | 100–200h |
| Low-temp flex | -40°C | -30°C | -25°C | -20°C |
| Price (¥/m²) | 20–22 | 58 | 48 | 35–70 |
Passive cooling that actually works — with the data to prove it
Most "cool roof" coatings are just white paint. GPOWER's radiative cooling film is a precision optical material engineered to reflect sunlight AND emit heat into space through the atmospheric window.
- 96.78% solar reflectance — bounces away nearly all incoming solar radiation (ASTM E903).
- 96.19% IR emissivity — emits heat through the 8–13 μm atmospheric window into cold space (ASTM E408).
- Sub-ambient cooling — surface temp drops 5°C+ below ambient air, 8°C+ below in concrete environments.
- 0.03 W/m·K thermal conductivity — also acts as insulation barrier (ASTM C518).
- Hydrophobic (≥158° contact angle) — self-cleaning, dust-resistant, durable outdoors.
| Metric | GPOWER Film B | Conventional cool coating | Standard white paint |
|---|---|---|---|
| Solar reflectance | 96.78% | 80–90% | 70–85% |
| IR emissivity | 96.19% | 75–85% | 85–92% |
| Temp drop vs ambient | >5°C (>8°C concrete) | 2–4°C | 1–2°C |
| Thermal conductivity | 0.03 W/m·K | 0.04 | N/A |
| Tensile strength | 10 MPa | 0.5 MPa | Brittle |
| Elongation | 170% | 10% | 0% |
| Energy needed | Zero (passive) | Zero (passive) | Zero (passive) |
Questions buyers ask first
It's a direct high-performance alternative to expanded PTFE (ePTFE) membranes like Gore-tex Pro. It matches Gore-tex's 10,000 g/m²/24h breathability, exceeds waterproof ratings, offers 67% better UV resistance (500h vs 300h), superior low-temp flexibility (-40°C vs -25°C), and costs approximately 38% of Gore-tex's price per m².
The film reflects 96.78% of sunlight while simultaneously emitting heat through the 8–13 μm atmospheric transparency window (96.19% emissivity) directly into cold outer space. This dual mechanism achieves passive daytime cooling of 5–8°C below ambient air temperature — zero watts required.
Yes. Both products support tunable properties: thickness, pore size distribution, surface treatment, lamination options, and custom widths. We supply rolls, sheets, and die-cut parts matched to your application — from apparel laminates to building facade panels to automotive interior films.
All key metrics are tested per ASTM standards (E96, D751, D5035, G154, D2137, E903, E408, C518, D5035, D638). Third-party certification reports and compliance documentation (REACH, RoHS) are available for qualified buyers under NDA. CE marking pathway is in progress for EU markets.
Also from GPOWER: Nanoceramic Aerogel Insulation
If you need high-temperature thermal management (1000°C+ industrial, coffee roasters, furnaces), check our aerogel product line — 15–30% energy savings, 5–10× lighter than firebrick.
Get free film samples and a joint test plan
We ship samples worldwide and work with your engineering team to validate performance in your exact application.