We Just Launched Formaldehyde-Free Glass Wool – Here’s Why Studios & Hospitals Are Switching in 2025

We Just Launched Formaldehyde-Free Glass Wool – Here’s Why Studios & Hospitals Are Switching in 2025

Ruibin here, InsulateWool / Hebei Woqin factory. For years we only did aerogel and VIPs, but every month someone asked “can you do glass wool that doesn’t stink of formaldehyde and actually hits NRC 0.9+?”. So we built a new line.

No phenol, no formaldehyde, no itchy dust. We use a silicone binder instead—costs us 40% more, but you can literally rub the bare wool on your arm with zero irritation.

What we actually make (no brochure lies):

Fiber diameter ≤6 μm (most factories still 8-10 μm)

Slag balls ≤0.3% (you won’t find black dots falling out)

Density 24-120 kg/m³ (custom no problem)

Thermal conductivity 0.032-0.035 W/m·K

NRC 0.85 at 30 mm, 0.95+ at 50 mm

Water repellency ≥98%

A1 fire rating, zero smoke, zero drip

Three jobs we finished in the last 8 months:

Beijing high-end recording studio 80 kg/m³ 50 mm panels behind fabric walls. Owner said low-frequency rumble from subway dropped 28 dB. Artists can now track vocals at 2 a.m. without bleed. Took 4 containers.

Shanghai private hospital operating theatres 60 kg/m³ 40 mm ceiling tiles. Zero formaldehyde = surgeons breathe easy. NRC 0.92 killed echo, noise level dropped from 52 dB to 36 dB. Passed clean-room air test first try.

Guangzhou 5-star hotel presidential suites 48 kg/m³ 50 mm behind gypsum board. Guests stopped complaining about corridor noise. HVAC contractor loved that it didn’t sag in 90% humidity.

2025 factory prices (FOB Tianjin, min 500 m²):

24-32 kg/m³ → USD 3.8-4.5/m²

48-64 kg/m³ → USD 5.2-6.8/m²

80-120 kg/m³ studio grade → USD 8.5-12/m²

Foil-faced or black tissue versions +USD 0.8-1.2/m²

One rule that saves headaches:

Don’t compress more than 10% on install—R-value and NRC both drop. We now cut exact sizes and send metal edge strips so installers don’t squash it.

Want to test in your studio or clean room?

Free 5 m² sample worldwide—you only pay freight (USD 150-250 by DHL). Comes with test reports, a roll of our aluminum tape, and my WeChat for midnight panic calls.

Formaldehyde-free glass wool isn’t cheap, but when your client can smell chemicals or the mix engineer hears subway rumble, nothing else works.

Drop your room size and target NRC—I’ll tell you in 10 minutes exactly what density and thickness you need and what it costs.

We built the line because you asked. Now it’s here.

Ruibin An

Hebei Woqin / InsulateWool