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PU/PIR Sandwich Wall Panel Polyurethane Insulated Wall Panel Factory Direct from China
Glostar's PU/PIR sandwich wall panel combines two pre-painted galvanized steel skins with a rigid polyurethane (PU) or polyisocyanurate (PIR) foam core, continuous-laminated under precision temperature and pressure control. The result is one of the most thermally efficient, structurally rigid, and lightweight insulated wall panels available — factory-manufactured in Shandong, China, and supplied direct to industrial, commercial, and cold storage projects across the Middle East, Southeast Asia, and South America.
- Overview
- Technical Specifications
- Applications
- Core Competence
- Recommended Products
Product details
PIR-grade panels incorporate a higher isocyanate ratio in the foam formulation, achieving improved fire resistance (B1 rating, EN 13501-1) and greater high-temperature stability — the preferred specification for pharmaceutical facilities, food processing plants, and buildings with stringent fire codes.
H2：Product Overview — PU vs PIR Core: What's the Difference?
Understanding the difference between PU and PIR cores helps you specify the right panel for your project requirements.
PU (Polyurethane) Core： Polyurethane foam offers the lowest thermal conductivity of any commercially available sandwich panel core (λ ≈ 0.022–0.025 W/m·K), delivering outstanding insulation performance at thinner panel depths. PU panels carry a B2 fire classification under EN 13501-1 and are the cost-efficient choice for general industrial warehouses, logistics centres, and commercial buildings where extreme fire resistance is not mandatory.
PIR (Polyisocyanurate) Core： PIR foam uses a modified chemistry that increases the isocyanate index, producing a denser, more thermally stable foam structure. PIR panels achieve B1 fire classification (low flammability) and retain structural integrity at higher temperatures. They are the specified choice for pharmaceutical GMP facilities, food production environments, and projects in the Middle East and Southeast Asia where local building codes require enhanced fire performance.
Both core types are produced without ozone-depleting HCFCs. Glostar uses pentane-blown PIR/PU formulations, compliant with environmental regulations across the EU, GCC, and ASEAN markets.
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Key Features & Performance Advantages
Best-in-Class Thermal Insulation With a thermal conductivity of λ ≤ 0.023 W/m·K, PU/PIR sandwich panels outperform rock wool and glass wool panels of equivalent thickness. A 100 mm PIR panel achieves a U-value of approximately 0.22 W/m²·K — dramatically reducing air-conditioning energy consumption in hot climates such as the UAE, Saudi Arabia, and Southeast Asia.
B1 Fire Resistance (PIR Grade) PIR sandwich wall panels meet Class B-s2,d0 fire classification per EN 13501-1 (B1 low-flammability grade). Panels self-extinguish when the ignition source is removed and produce limited smoke — satisfying fire safety requirements for pharmaceutical plants, food factories, and commercial buildings in the Middle East and Southeast Asia.
Exceptional Structural Rigidity The rigid closed-cell PU/PIR foam core bonds integrally with both steel skins, forming a composite structural panel with high flexural and compressive strength. Panels resist positive and negative wind loads of ±2.0 kPa as standard, suitable for typhoon-prone regions in Southeast Asia and coastal industrial zones in the Gulf.
Lightweight & Fast Installation PU/PIR panels weigh significantly less than mineral wool alternatives (typically 10–16 kg/m²), reducing structural steel load requirements and cutting on-site installation time. The tongue-and-groove or snap-fit joint system allows dry installation without specialist equipment, reducing labour costs on large-footprint projects.
Moisture & Corrosion Resistance The closed-cell foam structure of PU/PIR panels does not absorb water, making them inherently resistant to moisture-related degradation. Combined with PVDF- or polyester-coated galvanized steel skins, panels maintain performance and appearance in humid tropical climates (Vietnam, Malaysia, Indonesia) and corrosive coastal environments.
Zero Thermal Bridging Continuous foam core and tight-tolerance tongue-and-groove joints eliminate cold bridges at panel connections, maintaining consistent thermal performance across the entire wall surface — critical for energy efficiency certification and cold storage temperature control.
Wide Surface Profile & Colour Options Available in flat, micro-ribbed, stucco embossed, and corrugated profiles. Full RAL colour palette on both inner and outer steel skins. PVDF coating option for projects requiring 20+ year colour retention in extreme UV environments (Middle East, coastal Southeast Asia).
Technical Specifications
Panel Dimensions
| Parameter | Specification |
|---|---|
| Effective Panel Width | 1000 mm / 1150 mm / 1200 mm |
| Core Thickness | 50 / 75 / 100 / 120 / 150 / 200 mm |
| Maximum Panel Length | ≤ 12,000 mm |
| Steel Skin Thickness | 0.4 mm / 0.5 mm / 0.6 mm |
| Panel Weight | 10 – 16 kg/m² (thickness-dependent) |
| Joint Type | Tongue & Groove / Snap-Fit |
| Fastening System | Hidden screw (concealed fixing) |
Thermal & Acoustic Performance
| Parameter | PU Core | PIR Core |
|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.025 W/m·K | ≤ 0.023 W/m·K |
| U-Value (100 mm panel) | ≈ 0.25 W/m²·K | ≈ 0.22 W/m²·K |
| Sound Reduction (Rw) | ≥ 26 dB | ≥ 26 dB |
| Operating Temp. Range | –40°C to +80°C | –40°C to +120°C |
| Core Density | 38–42 kg/m³ | 40–46 kg/m³ |
Fire & Certification
| Parameter | Specification |
|---|---|
| Fire Classification (PU) | Class B2 (EN 13501-1) |
| Fire Classification (PIR) | Class B1, B-s2,d0 (EN 13501-1) |
| Blowing Agent | Pentane (zero ODP) |
| CE Marking | Yes |
| ISO 9001 | Yes |
Steel Skin Specifications
| Parameter | Specification |
|---|---|
| Base Material | Hot-dip galvanised steel (Z275 / AZ150) |
| Coating Type | Polyester (PE) / PVDF / HDP |
| Top Coat Thickness | ≥ 25 μm |
| Surface Profile | Flat / Micro-rib / Stucco / Corrugated |
| Colour | Full RAL palette (custom) |
| Salt Spray Resistance | ≥ 500 hours |
Applications
Industrial Warehouses & Logistics Centres PU sandwich wall panels are the industry standard for steel structure warehouses and distribution centres requiring fast construction, durable exterior cladding, and basic thermal insulation. Widely used across Vietnam's manufacturing zones, Malaysia's logistics hubs, and Brazil's agribusiness facilities.
Pharmaceutical & GMP-Compliant Facilities PIR sandwich panels meet the fire resistance and surface hygiene requirements for pharmaceutical manufacturing environments. Smooth, non-porous steel surfaces are easy to clean and disinfect. Supplied to pharmaceutical projects in UAE, Saudi Arabia, Jordan, and Colombia.
Food Processing & Cold Chain Facilities The moisture-resistant closed-cell PIR core and hygienic steel interior surface make PU/PIR sandwich panels the preferred choice for food processing plants, HACCP-certified production environments, and cold storage warehouses operating at temperatures from –30°C to +10°C.
Commercial & Prefab Buildings Office parks, retail centres, modular buildings, and prefabricated structures benefit from the lightweight, high-rigidity, and aesthetically flexible nature of PU sandwich wall panels. Available in a wide range of colours and surface profiles for architectural facade applications.
Electronics & Semiconductor Manufacturing Clean, flat-surface PIR panels with controlled thermal environments support the sensitive production conditions required in electronics and semiconductor facilities. Increasingly specified for factory expansion projects in Vietnam, Thailand, and Malaysia.
Cold Storage & Refrigerated Warehouses High-performance PIR core provides the thermal efficiency essential for refrigerated and frozen storage facilities. Panels maintain temperature integrity with minimal energy consumption — critical for cold chain operators in Brazil, Indonesia, and the Gulf region.
Core Competence
Why Choose Glostar as Your PU/PIR Sandwich Panel Manufacturer?
Own Factory, Not a Trading Company Every panel is manufactured at our dedicated facility in Shandong, China. We operate continuous double-belt lamination lines with automated thickness and density control — ensuring consistent product quality across every batch.
CE Certified with Full Test Documentation All PU/PIR panels carry CE marking and are tested to EN 13501-1 (fire), EN ISO 6946 (thermal), and EN 13964 (suspended ceiling) standards. Full test reports, material certificates, and CE declarations of performance are supplied with every shipment.
Custom Specifications Welcome We produce panels to your exact requirements: custom length up to 12,000 mm, custom thickness, custom steel gauge, custom RAL colour, custom joint profile, and custom surface texture. OEM and private-label production is available.
20–30 Working Day Lead Time Standard production lead time is 20–30 working days from receipt of order deposit. Rush production and ex-stock arrangements are available for time-critical projects.
Free Technical Support Before You Order Our engineering team provides free project review, U-value calculations, fire compliance checks, and panel quantity take-offs from your architectural drawings — at no charge and with no obligation to order.
Competitive FOB & CIF Pricing Factory-direct pricing with no middleman margin. We quote FOB Qingdao/Tianjin and CIF to your nearest port. Volume pricing available for orders above 5,000 m².
Frequently Asked Questions — PU/PIR Sandwich Wall Panels
Q1: What is the difference between PU and PIR sandwich panels? PU (polyurethane) and PIR (polyisocyanurate) panels use similar rigid foam cores but with different chemical formulations. PIR foam has a higher isocyanate index, which delivers improved fire resistance (B1 vs B2 classification), better performance at elevated temperatures, and slightly lower thermal conductivity. PU panels are cost-effective for general industrial use; PIR panels are the specified choice wherever fire codes require low-flammability materials — such as pharmaceutical facilities, food factories, and high-rise commercial buildings.
Q2: Are PU/PIR sandwich panels suitable for hot climates like the Middle East? Yes. PU/PIR panels are ideal for hot climates due to their industry-leading thermal insulation performance. A 100 mm PIR wall panel achieves a U-value of approximately 0.22 W/m²·K, significantly reducing heat gain through the building envelope and lowering air-conditioning energy costs. The closed-cell foam structure also resists moisture absorption, maintaining insulation performance in humid Gulf coastal environments.
Q3: Can you supply PU/PIR sandwich panels for cold storage projects? Yes. Our PIR sandwich wall panels are widely used in cold storage and refrigerated warehouse construction. The closed-cell foam structure provides excellent thermal resistance and zero moisture absorption — essential for maintaining stable low temperatures. We can provide U-value calculations and cold storage panel layout drawings upon request.
Q4: Do you offer samples before ordering? Yes, we can provide physical panel samples (typically 300 × 300 mm) with the requested core type, thickness, steel profile, and colour for your review and approval before production commences. Sample charges may apply and are refundable against your first order.
