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Natural Formaldehyde Free Glass Wool Insulation Board Eco Conscious Custom Size. Formaldehyde-Free Eco-Friendly: Made with eco-friendly binders, eliminating formaldehyde emissions for healthy indoor air quality. Class A Non-Combustible: Meets top-tier fire safety standards, does not burn or produce toxic smoke under high heat. Customizable Dimensions: Supports customized length, width, thickness, density, and surface facing for specific projects. 24-Hour Response Support: Professional online technical guidance, construction plans, and parameter matching available. Free Test Samples: Free small samples provided for testing; buyers only cover express freight costs.