Full definition
Expanded polychloroprene (CR) rubber produced in closed-cell or open-cell form, combining the chemical resistance and flame retardancy of solid neoprene with thermal insulation, cushioning, and compressible sealing properties. Closed-cell foam: cells are sealed, making the material waterproof and buoyant; densities 80-250 kg/m³; excellent for gaskets, HVAC insulation, wetsuits, and marine applications; per ASTM D1056 designation 2A1 or 2A2. Open-cell foam: interconnected cells, softer and more compressible; densities 100-400 kg/m³; for cushioning, filtration, and acoustic insulation; per ASTM D1056 designation 2D1 or 2D2. Temperature range: -40 to +105°C. Flame resistance: passes UL 94 HBF, FMVSS 302. Sheet sizes: typically 1300 × 2000 mm, thicknesses 1.5-50 mm. Adhesive-backed versions available. Key brands: Rubatex (Armacell), Den-Wal, Monmouth Rubber. Applications: HVAC duct insulation, diving wetsuits (3-7 mm), gaskets for outdoor electrical enclosures, pipe insulation, laptop sleeves, and equipment cases. Neoprene foam combines insulation, sealing, and protection in a single material.