PU Polyurethane Insulation Board – Closed-cell, Waterproof, Flame-retardant for Exterior Wall & Cold Storage
1.Product Overview
Made of high-performance polymer via high-density closed-cell foaming, our PU rigid foam board features ultra-low thermal conductivity, approximately half that of rock wool and XPS for superior energy-saving efficiency. It integrates waterproofing, lightweight high strength, dimensional stability and aging resistance, with customizable B1/B2 fire-rated grades. Ideal for exterior walls, roofs, cold chain warehouses and HVAC systems, it is a premium green insulation material.
2.Core Product Features
This PU rigid foam board delivers high R-value thermal insulation with ultra-low thermal conductivity, featuring a 95%+ closed-cell structure for excellent waterproof, moisture-proof and freeze-thaw resistance. Lightweight yet high in compressive strength, it resists deformation and aging for long-term durability. It supports flexible on-site cutting to fit diverse scenarios, and provides optional B1/B2 fire-rated grades to meet different engineering fire safety standards.
3.Technical Specifications
Standard Thickness: 20mm, 30mm, 50mm, 75mm, 100mm (custom non-standard thickness available)
Standard Dimension: 1200×600mm, 2400×1200mm (custom sizes supported)
Density: 35~60kg/m³Thermal Conductivity: ≤0.022 W/(m·K) @ 25℃Closed-cell Rate: ≥95%Compressive Strength: ≥150kPa (GB/T 8813)
Volumetric Water Absorption: ≤3%Flame Retardant Grade: Standard B2 grade, customizable B1 grade (GB 8624)
Operating Temperature: -50℃～+120℃
4.Material Selection Guide & Comparison
PU rigid foam board integrates high R-value thermal performance, full waterproof capability, lightweight structure and fiber-free clean construction. It is the optimal choice for projects requiring high insulation efficiency, space-saving installation, strong humidity resistance and long-term energy-saving benefits, covering cold chain storage, exterior wall thin-plaster insulation, roofing insulation, industrial equipment and HVAC cold preservation systems.
Material Comparison: PU foam board surpasses XPS in thermal efficiency, closed-cell rate, waterproof performance and dimensional stability. Compared with rock wool, it is lighter, fully waterproof and dust-free, maintaining stable performance in humid environments. Note: Long-term safe operating temperature is ≤120℃. It is not applicable for high-temperature steam pipelines, ultra-high-temperature equipment and fire isolation zones, where rock wool is the preferred alternative.
5.Main Application Scenarios
Building Energy-saving Insulation
Applicable for new and renovated civil and commercial buildings, it suits exterior wall thin-plaster, roof, curtain wall and ceiling insulation. It stabilizes indoor temperature, cuts HVAC consumption and improves building overall energy efficiency.
Cold Storage & Cold Chain Engineering
Perfect for cold storage, cold chain warehouses and refrigerated equipment. It remains stable at ultra-low temperatures, resists moisture ingress and freeze-thaw damage, ensuring constant-temperature and energy-saving operation for cold chain systems.
Industrial Equipment & Tank Insulation
Suitable for insulation of chemical tanks, LNG cryogenic tanks, reaction kettles and boiler peripheries. It stabilizes equipment temperature, reduces energy loss, and provides moisture-proof, anti-corrosion and noise-reduction protection.
HVAC System Insulation
Ideal for central air conditioning, ventilation ducts and industrial pipelines. Flexible cutting fits all regular and special-shaped fittings, preventing condensation and pipeline corrosion to ensure stable HVAC system operation.
High-end Special Engineering
It satisfies strict temperature, humidity and cleanliness standards for clean rooms, medical workshops, food processing plants and low-temperature constant-temperature laboratories.
6.Installation Guidelines
Exterior Wall Construction
For exterior walls, use point-frame bonding with mortar and anchor bolt reinforcement. Seal all joints with PU foam to eliminate cold bridges, water seepage and heat leakage for integral insulation performance.
Cold Storage Construction
For cold storage construction, evenly apply dedicated PU adhesive and press boards tightly to minimize gaps. This avoids cold loss and condensation icing to guarantee stable constant-temperature insulation.
Cutting Requirements
Cut with electric hot wire cutters or fine-tooth saws for burr-free edges. Smooth notches ensure tight splicing and prevent insulation dead angles during installation.
On-site Safety Specifications
No open fire or high-temperature welding on construction sites. Maintain standard fire spacing for B2-grade boards to comply with engineering safety regulations.
7.Packaging & Purchasing Terms
Packaging: Adopts export-grade triple-layer packaging with moisture-proof film, carton and outer wrapping film, resisting moisture, collision and extrusion during long-distance transportation.Stock & Customization: Standard sizes are in stock for fast delivery. Custom thicknesses, dimensions and B1 fire-rated upgrades are available for engineering and long-term cooperative orders.Lead Time: 3–5 working days for stock orders; 15–20 working days for customized products, adjustable by order quantity.Services & Warranty: Complete inspection and flame retardant certificates are provided. Professional technical guidance is available. Standard installation ensures long-term stable performance and low maintenance costs.
8.FAQ
Q1: What are the key differences between PU board and XPS board?
A1: PU foam board has lower thermal conductivity, higher closed-cell rate, better waterproof performance and stability than XPS with higher energy efficiency, ideal for high-standard projects, while XPS fits ordinary insulation works.
Q2: Can PU boards be used for long-term cold storage floor bearing?
A2: Standard boards are for cold storage walls and ceilings only. Custom high-compression boards or surface wear-resistant treatment is required for forklift and heavy-load floor scenarios.
Q3: Is PU board flammable? Can it reach B1 flame retardant grade?
A3: Standard board is B2 self-extinguishing. Custom B1 fire-rated grade is available, complying with GB 8624 standards with low smoke and low toxicity for standard fire safety requirements.
Q4: Can it be used for pipelines above 120℃?
A4: Not applicable. Its safe long-term working temperature is -50℃ to +120℃. Rock wool is the optimal material for ultra-high-temperature equipment and steam pipelines.
Q5: Are custom sizes and processing available?
A5: Full size, thickness and fire-grade customization is supported. On-site cutting and shaping can meet insulation demands for various special-shaped equipment and pipelines.
9.Product Summary
PU rigid foam board is a premium closed-cell polymer insulation material with high R-value, ultra-low thermal conductivity, full waterproof performance and lightweight high strength. With customizable B1/B2 fire-rated grades and fiber-free clean construction, it outperforms traditional XPS and rock wool in energy efficiency and environmental adaptability.Widely used for building exterior wall, roof, cold chain and industrial HVAC insulation, it serves as a cost-effective, reliable and fire-safe solution for modern green building construction and industrial energy-saving renovation projects.
