Industrial Sandwich Panel Core‑Material Comparison
? Industrial sandwich panel is key prefabricated building material for steel‑structure factory, warehouse, partition and exterior wall. Four popular core‑material types: EPS, rock wool, PU, silicon‑rock. These industrial sandwich panel look similar, but differ greatly in fire rating, insulation, moisture resistance, mechanical strength and cost. Wrong selection will cause failed inspection, poor thermal performance, water leakage and delamination. This article compares their pros & cons and gives site‑oriented selection advice for factory projects.
| Comparison Item | EPS Foam Industrial Sandwich Panel | Rock Wool Industrial Sandwich Panel | PU Industrial Sandwich Panel | Silicon‑Rock Industrial Sandwich Panel |
|---|---|---|---|---|
| Fire Rating ? | Class B2 combustible, poor fire performance, not for strict fire inspection | Class A non‑combustible, excellent high‑temperature resistance for strict fire projects | Class B1 self‑extinguishing, works for most industrial sites | Class A non‑combustible, stable fire‑proof performance, low dust falling |
| Thermal Insulation ❄️ | Good, thermal conductivity 0.038‑0.042W/(m·K) | Medium, weaker insulation than EPS & PU | Excellent, thermal conductivity 0.022‑0.027W/(m·K), best energy‑saving effect | Good balanced insulation & fire‑proof performance |
| Moisture‑proof ? | Closed‑cell structure, water‑resistant, anti‑condensation | Open‑cell structure, easy to absorb moisture, performance drops in humid environment | High‑density closed cell, outstanding water‑proof & anti‑condensation | Good hydrophobic property, stable under humid industrial conditions |
| Mechanical Strength ⚙️ | Light‑weight, moderate compression resistance, slight deformation on large‑span roof | Soft core, low impact resistance, edge moisture leakage risk | High bonding strength, good wind‑resistance & anti‑deformation | High hardness, flat surface, anti‑bulge and anti‑delamination |
| Sound Insulation ? | Medium for basic factory demand | Excellent sound‑absorbing for noisy production workshop | Good sealed‑structure sound insulation | Balanced sound‑insulating performance |
| Project Cost ? | Lowest, ideal for temporary building | Medium‑high among Class‑A fire panels | High‑cost premium thermal‑insulation panel | Medium cost, good overall value |
| Main Advantages ✅ | Light weight, fast installation, budget‑friendly | Class‑A fire‑proof, high‑temp resistance, good sound absorption | Top‑tier insulation, energy‑saving, long service life | Class‑A fire‑proof, flat surface, anti‑corrosion |
| Main Drawbacks ❌ | Low fire rating, not for formal fire‑inspected factory | Moisture‑absorbing risk, cold bridge risk on edges | Higher cost, inferior fire performance vs rock‑wool / silicon‑rock | Slightly worse insulation performance compared with PU |
| Typical Application ? | Temporary site building, simple warehouse without strict fire requirement | Chemical plant, high‑temp workshop, Class‑A fire‑required projects | Cold storage, constant‑temperature workshop, energy‑saving factory exterior wall | Food, electronic, pharmaceutical factory, industrial partition & exterior wall |
General Market Product Analysis ?Low‑cost EPS industrial sandwich panel from ordinary suppliers suits temporary projects, yet many have under‑density core and false fire‑rating marks, leading to aging, shrinkage and surface bulge. Ordinary rock‑wool industrial sandwich panel offers Class‑A fire‑proof, but without edge sealing, edges absorb water easily and core powderizes over time. Some low‑grade PU industrial sandwich panel suffers uneven foaming and delamination. Low‑end silicon‑rock industrial sandwich panel has flatness and dimension errors, causing obvious seams after installation.
Scenario‑Based Buying Advice ?
Low‑budget temporary site building & simple warehouse: Choose EPS industrial sandwich panel for light weight, fast installation and low cost.
Strict fire‑code, high‑temperature or chemical noisy workshop: Rock‑wool industrial sandwich panel is preferred. SAMZOON PU‑edge‑sealed rock‑wool industrial sandwich panel solves cold bridge and edge water‑absorbing risk.
Cold storage & constant‑temperature energy‑saving factory: PU industrial sandwich panel delivers superior thermal insulation and anti‑condensation performance.
Food, electronic and pharmaceutical factory requiring fire‑proof, moisture‑proof and nice appearance: Silicon‑rock industrial sandwich panel is recommended.
As local source manufacturer, SAMZOON supplies full‑series custom industrial sandwich panel including EPS, rock wool, PU and silicon‑rock. Free samples, expedited production and technical support for factory project selection and construction are available.
Sourcing Reminder ⚠️Do not judge industrial sandwich panel only by unit price. Verify core density, official fire‑test report and edge‑sealing craft. For roof and exterior wall, confirm wind‑resistance and waterproof system to avoid water leakage, condensation and delamination.
