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B2 Flame Retardant Rating Heat Insulation XPS Board 100mm Waterproof Polystyrene Foam. Multi-Scenario Insulation: Ideal for external walls, balconies, underfloor heating, and cold storage applications. High Compressive Strength: Offers 150kpa to 1200kpa compressive strength for excellent stability and pressure resistance. Customizable Dimensions: Available in lengths 1200mm-9000mm, widths 600mm-1200mm, and thicknesses 20mm-100mm. Flame Retardant Options: Provides B1, B2, or B3 flame retardant ratings for enhanced safety compliance. Flexible Color Choices: Available in pink, green, yellow, and white to suit various aesthetic requirements. OEM/ODM Service: We accept OEM/ODM orders with flexible customization from samples or designs.