Zhejiang exterior rock wool board manufacturer wholesale Zhejiang exterior rock wool board. Sold for building exterior thermal insulation, these rock wool boards are guaranteed for quality and offer excellent pricing. Made from inorganic fiber boards that undergo high-temperature melting processing, they feature light weight, low thermal conductivity, heat absorption, and non-flammability. Rock wool boards are widely used in the petrochemical, textile metallurgy, power traffic, construction, and agriculture sectors. Particularly in construction, their extensive application provides strong support and assurance for China to build more green buildings.

Primary fire-resistant features:
1. Features A1 fire rating, effectively preventing the spread of fire.
2. The size is extremely stable; it will not elongate, contract, or deform in a fire.
3. High-temperature resistance, melting point above 1000°C.
4. No smoke or burning droplets/particles produced in fire.
5. Will not emit harmful environmental substances or gases in case of fire.

Insulation and thermal protection
Rock wool fibers are fine, long, and flexible with low slag content. Consequently, they have a low thermal conductivity and offer excellent thermal insulation properties.
Sound Absorption and Noise Reduction
Rock wool is an ideal soundproofing material; its abundance of fine, elongated fibers form a porous interconnected structure, determining its superiority as an excellent sound-absorbing and noise-reducing material.

Hydrophobic
Water-repellent rock wool products achieve a water-repellency rate of up to 99.9%; extremely low water absorption, with no capillary penetration.

Moisture resistance
Rockwool has a moisture absorption rate of less than 0.2% in environments with high relative humidity; tested according to ASTM C1104 or ASTM 1104M methods, the moisture content is less than 0.3%.