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Wholesale High-Performance Rockwool Insulation Board Aluminum Foil Faced for Wall Roof Ceiling. Class A1 Non-Combustible: Fire resistance rating of Class A1 with a limit of up to 2 hours for superior safety. Durable Basalt Material: Made from natural basalt with high acidity coefficient (1.8) for long-lasting durability. Water Repellent Design: Features a hydrophobic rate of 99.7% and aluminum foil facing for weather resistance. Versatile Applications: Suitable for building insulation, fire-rated ducts, and industrial equipment protection. Professional Support: Provides online technical support, installation guidance, and on-site construction assistance.