B2 Fire Retardant PU Expanding Foam for Install Fire-Proof Door

B2 Fire Retardant PU Expanding Foam for Install Fire-Proof Door. Fire Retardant Performance: Meets DIN 4102 B3 fire class standard for enhanced safety. High Adhesive Strength: Exceeds 120 kPa for strong bonding on various surfaces. Low Shrinkage & Expansion: Features zero shrinkage and controlled post-expansion. Closed Cell Structure: 80-90% closed cells provide excellent insulation properties. OEM & ODM Services: Customization available from samples and designs. ISO Certified Quality: Manufactured with latest technology complying with European standards.