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Factory Direct Sales of Mortar Paper Rock Wool Board, Quartz Mortar Rock Wool Board. Flame Retardant: Ensures high safety standards with fire-resistant properties. Heat Insulation: Provides excellent thermal insulation for energy efficiency. High Temperature Resistance: Withstands working temperatures up to 500 degrees. Basalt Material: Made from durable basalt for long-lasting performance. Easy to Install: Designed for quick and simple installation processes. Enhanced Stability: Offers stronger board stability compared to traditional rock wool. Sound Insulation: Significantly improved sound insulation performance. Waterproof Performance: Features certain waterproof capabilities for durability.