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Efficient Formaldehyde Free Glass Wool Insulation Roll Thermal Acoustic Blanket Custom Size. Class A Fire Rating: Meets Class A non-combustible standard for maximum fire safety. Formaldehyde Free: Formaldehyde not detected; eco-friendly and non-polluting. Custom Dimensions: Supports customization of length, width, thickness, and density. Moisture & Mildew Resistant: Corrosion and mildew resistant for long-lasting durability. Flexible Installation: Flexible roll shape allows free cutting and laying for various projects. ISO Certified: Products certified with ISO, CE, and ASTM standards. Online Technical Support: 24-hour response with professional guidance and construction plans.