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Product Introduction

A PU sealed XPS sandwich panel combines extruded polystyrene core with rigid polyurethane edge sealing, delivering exceptional thermal insulation and moisture resistance for cold storage, cleanrooms, and industrial envelopes. The closed-cell structure prevents water ingress, while the seamless PU seal eliminates thermal bridging at joints. Lightweight yet high-strength, these composite panels enable rapid installation, reduce energy consumption, and ensure long-term dimensional stability in demanding environments, making them ideal for temperature-controlled facilities and prefabricated building systems.

Product Specification

Parameter	Specification
Panel Core Material	Extruded Polystyrene (XPS)
Edge Sealing Material	Rigid Polyurethane (PU) foam
Core Density	32 – 45 kg/m³
Panel Thickness	50 / 75 / 100 / 120 / 150 / 200 mm (customizable)
Panel Width	900 / 1000 / 1150 mm (depending on production line)
Panel Length	Up to 12,000 mm (custom cut available)
Thermal Conductivity (λ)	≤ 0.028 W/(m·K)
Compressive Strength	≥ 250 kPa (at 10% deformation)
Water Absorption (by volume)	≤ 0.3%
Fire Resistance Rating	Class B1 / B2 (per GB 8624 or EN 13501)
Face Material (optional)	Galvanized steel / Al-Zn coated steel / PVDF or PE color-coated steel

Product Advantages

Superior thermal efficiency

Closed-cell XPS core with PU edge sealing delivers λ ≤ 0.028 W/(m·K), slashing energy costs in cold storage and cleanrooms.

Zero moisture penetration

The integrated PU seal and XPS closed-cell structure block water absorption below 0.3%, preventing core degradation and mold growth.

High compressive strength

Withstands heavy loads at ≥ 250 kPa, making PU sealed XPS sandwich panels ideal for flooring, roofing, and high-traffic industrial zones.

Fast, gap-free installation

Precision tongue-and-groove joints with factory-applied PU seal eliminate thermal bridging and reduce on-site labor time significantly.

PU Sealed XPS Sandwich Panel VS PU Sealed rockwool Sandwich Panel

Parameter	PU Sealed XPS Sandwich Panel	PU Sealed Rockwool Sandwich Panel
Core Material	Extruded Polystyrene (XPS)	Stone wool / Mineral wool (Rockwool)
Edge Sealing	Rigid PU foam edge sealing	Rigid PU foam edge sealing
Thermal Conductivity (λ)	≤ 0.028 W/(m·K)	≤ 0.040 W/(m·K)
Fire Resistance Rating	Class B1 / B2 (combustible, self-extinguishing)	Class A1 / A2 (non-combustible)
Maximum Service Temperature	-50°C to +80°C	Up to 650°C – 800°C (fire barrier)
Water Absorption (by volume)	≤ 0.3% (very low)	≥ 1.5% – 2.0% (hygroscopic)
Compressive Strength	≥ 250 kPa (high)	≥ 40 – 60 kPa (moderate)
Density	32 – 45 kg/m³	100 – 150 kg/m³
Sound Insulation (Rw)	Moderate (≈ 25 – 30 dB)	Excellent (≈ 35 – 45 dB)
Dimensional Stability	Excellent (low shrinkage/expansion)	Good (may settle over time if moist)
Moisture Resistance	Excellent – closed-cell structure	Poor – requires strict moisture barrier
Joint Integrity with PU Seal	Excellent, stable seal over time	Good, but core compressibility may affect seal under load
Typical Applications	Cold storage, cleanrooms, food processing, logistics warehouses	Fire-rated walls, partition walls, HVAC rooms, petrochemical plants, high-temperature zones
Cost Level	Moderate	Higher (due to raw material and manufacturing)
Installation Ease	Lightweight, easy cutting and handling	Heavier, requires more labor and dust protection
Environmental Consideration	XPS contains blowing agents; recyclable but less eco-friendly	Rockwool is natural stone-based, highly recyclable, and fire-safe

Service

Comprehensive Construction Solutions for Modern Infrastructure


Precision Material Fabrication	Custom Structural Design	Project Management & Installation	Technical Consultation & Support

Yumisteel is a comprehensive construction solution provider dedicated to driving innovation in the construction industry. We offer clients intelligent, durable, and cost-effective solutions, covering every stage from initial design to final installation.

We are not just construction material suppliers; we are your strategic engineering partners who solve complex structural challenges. We integrate advanced manufacturing technology, rigorous quality control, and expert project coordination to deliver robust, reliable, and sustainable steel structures.