Rock wool sandwich composite panel is a commonly used composite building material.
Norgit recommends the high-quality waterproof and fireproof rock wool to you:
The waterproof rate is not less than 98% and the panel surface is more stable.
It does not produce corrosive substances. It has good performance of fire prevention.
In order to meet the higher fire-proof requirement of buildings, Norgit has launched the high-quality A Class Fireproof Rockwool Sandwich Wall Panel. The product uses high-quality water-proof rock wool as the core material. Through the super long precision double-track curing, the product is excellent in terms of fire prevention, thermal insulation, noise reduction and environmental protection.
https://www.norgitsteel.com/steel-cladding/sandwich-wall-panel/a-class-fireproof-rockwool-sandwich-wall.html