Premium Rockwool (Stone Wool) insulated panels
Outstanding non-combustible performance (Class A1) with heat resistance exceeding 1,000°C
Ideal for electrical rooms, generator rooms, and specialized temperature-controlled environments
Rockwool Sandwich Panels are fire-rated insulated metal panels featuring a stone wool (mineral wool) core sandwiched between two steel facings. The core is made from molten basalt rock spun into fibers and compressed perpendicular to the steel sheets, creating exceptional fire resistance and acoustic insulation properties that cannot be matched by organic foam cores like PUR or PIR.
Euro Class A1 fire rating – withstands temperatures above 1,000°C without igniting, emitting toxic smoke, or melting.
Supports designs in compliance with FM 4880/4881/4882 and BS 476 standards (based on certified test reports).
Provides excellent sound absorption of 30+ dB (50 mm), making it suitable for generator rooms and industrial facilities requiring noise control.
Does not absorb moisture, helps prevent mold growth, resists moisture-related deterioration, and is ideal for Thailand’s hot and humid climate.
Operating temperature range from -30°C to +250°C, with a melting point above 1,000°C and long-term resistance to performance degradation.
Service life exceeding 50 years without shrinkage or deterioration over time, and completely asbestos-free for safe use.
| Specification | Detail |
|---|---|
| Product Name | MKS RW/L-C Fire proof Sandwich Panel, MKS RW/X-C Fire proof |
| Width | 1200 mm Standard |
| Length | Up to Requirement / Transport / Container |
| Facer Material | Superdyma CRP Anti-Bacterial ZM180, Stainless Steel AISI304 |
| Facer Thickness | 0.45 – 0.65 mm (APT), FM Approved ≥ 0.55mm (APT) |
| Facer Color | Off White / Up to Requirement |
| Surface Type | Flat and Rib |
| Panel Thickness | 40, 50, 75, 100, 125, 150 mm |
| Thermal Conductivity (λ) | 0.036 – 0.038 W/mK |
| Test Method | FM Approved, BS-476 |
Fire-Rated Walls
2–4 hour fire-rated wall systems for factories, warehouses, and high-rise buildings requiring FM 4880/FM 4881 standards.
Generator / Electrical
Generator rooms, electrical rooms, and switchgear rooms with fire risks and high noise levels, requiring sound insulation performance of 30+ dB.
Cleanroom
Pharmaceutical facilities, food processing plants, and production areas requiring FM4882 certification for smoke-sensitive occupancies.
Industrial Acoustic Wall Systems
Factories with high noise levels (>85 dB) that require noise reduction for employees while maintaining fire protection performance.
Healthcare
Operating rooms, ICUs, and isolation rooms requiring Class A1 non-combustible materials with anti-bacterial coating.
Hazardous Storage
Chemical, oil, and flammable material storage facilities requiring Euro Class A1 non-combustible standards.
| Criteria | Rockwool RW100/RW125 | PIR/PIR FM | Winner |
|---|---|---|---|
| Fire Performance |
★★★★★
Non-Combustible A1 (>1000°C) |
★★★
Combustible B/C (PIR FM: up to B-s1) |
Rockwool |
| Thermal Efficiency (λ) | 0.036 – 0.038 W/m·K | 0.020 – 0.023 W/m·K | PIR |
| Acoustic Insulation | ★★★★ 30+ dB (50mm) | ★★★ 22 – 26 dB | Rockwool |
| Weight | Heavier (15 – 29 kg/m²) | Lighter (8 – 15 kg/m²) | PIR |
| Moisture Resistance | ★★★★ Water-repellent | ★★★★★ Closed-cell hydrophobic | PIR |
| Installation | Medium (requires structural support) | Easier (lightweight) | PIR |
| FM Approval | FM4880, FM4881, FM4882 | FM4880, FM4881 (FM grade only) | Both |
| Cost | Higher initial cost | Moderate (FM grade: premium) | PIR |
| Lifespan in Fire Zones | 50+ years (non-degrading) | 20 – 30 years | Rockwool |
Fire safety is the top priority
→ Non-Combustible Class A1 is required
The area has a high fire risk
→ Generator rooms, chemical storage facilities, and industrial plants
Excellent sound insulation is required
→ 30+ dB sound reduction
Required by insurance policies
→ Some policies require Class A1 materials
FM4882 Cleanroom applications
→ Pharmaceutical and food processing facilities
Long-term performance is required
→ Service life of 50+ years with minimal deterioration
Energy efficiency is the priority
→ Cold rooms and frozen storage warehouses
Weight limitations are a concern
→ Existing structures and older buildings
Space is limited
→ Thinner wall systems (PIR can be up to 30% thinner)
Budget is limited
→ PIR is generally more cost-effective than Rockwool
Moderate fire performance is sufficient
→ B-s1 classification is adequate (FM-approved PIR)
Easier installation is preferred
→ Lightweight material requiring less labor
| Application Type | Fire Rating Required | Recommended Thickness | Notes |
|---|---|---|---|
| Low fire risk areas (พื้นที่เสี่ยงไฟต่ำ) | 1–2 hours | 50–75 mm | Offices meeting rooms general partitions |
| Generator rooms (ห้องเครื่องปั่นไฟ) | 2–3 hours | 75–100 mm | Requires acoustic + fire protection |
| Chemical storage (คลังเคมี) | 3–4 hours | 100–150 mm | High hazard maximum fire protection |
| Cleanrooms FM4882 (ห้องผลิตยา/อาหาร) | 2–3 hours | 75–100 mm | Smoke-sensitive + GMP requirements |
| Fire escape corridors (ทางหนีไฟ) | 2 hours minimum | 75–100 mm | Building code compliance required |
| Panel Thickness | Sound Reduction (dB) | Suitable For |
|---|---|---|
| 50 mm | 30–32 dB | Light noise control office partitions |
| 75 mm | 35–37 dB | Moderate noise small generator rooms |
| 100 mm | 38–40 dB | High noise factories large generators (500kVA+) |
| 125–150 mm | 41–43 dB | Extreme noise control recording studios hospitals near generators |
| Thickness (mm) | U-Value RW100 (W/m²·K) | U-Value RW125 (W/m²·K) | R-Value RW100 (m²·K/W) | R-Value RW125 (m²·K/W) |
|---|---|---|---|---|
| 50 | 0.66 | 0.68 | 1.52 | 1.47 |
| 75 | 0.44 | 0.45 | 2.27 | 2.21 |
| 100 | 0.33 | 0.34 | 3.03 | 2.94 |
| 125 | 0.26 | 0.27 | 3.79 | 3.68 |
| 150 | 0.22 | 0.23 | 4.55 | 4.41 |
| Thickness (mm) | Weight RW100 (kg/m²) | Weight RW125 (kg/m²) | Structural Consideration |
|---|---|---|---|
| 50 | 15 | 16 | Light – suitable for standard structures |
| 75 | 18.5 | 19.5 | Medium – standard steel support required |
| 100 | 22 | 23.5 | Heavy – verify structural capacity |
| 125 | 25.5 | 27 | Very heavy – reinforced support needed |
| 150 | 29 | 31 | Maximum – special structural design required |
Rockwool Sandwich Panel pricing depends on multiple factors, helping ensure more accurate budget planning.
MKS PANEL CertificatesPanel Thickness
Facer Grade
FM Certification Level
Panel Length
Order Quantity
Installation & Logistics
Rockwool is made from Stone Wool (basalt rock), a Euro Class A1 non-combustible material that can withstand temperatures above 1,000°C without igniting or melting, making it ideal for high fire-risk areas. In contrast, PIR is made from Polyisocyanurate foam, an organic material that is combustible (Class B/C or B-s1 for FM-approved PIR), but offers superior thermal insulation performance (λ 0.020–0.023 W/m·K compared to Rockwool’s 0.036–0.038 W/m·K) and lighter weight, making it more suitable for cold rooms and facilities with structural weight limitations.
FM4880 is the fundamental standard for interior panels (interior walls and ceilings), requiring successful completion of the corner room fire test and the parallel panel test.
FM4881 is the standard for exterior panels (exterior walls), requiring compliance with all FM4880 test requirements, along with additional wind load and weather resistance testing.
FM4882 is the standard for cleanrooms and smoke-sensitive environments, requiring compliance with FM4880, ASTM E84 (surface burning characteristics), and the 16-foot parallel panel test. It is suitable for pharmaceutical facilities, food processing plants, and semiconductor manufacturing facilities.
A 100 mm thick Rockwool Panel can generally provide 2–3 hours (120–180 minutes) of fire resistance in accordance with BS 476 or ASTM E119 standards. However, the actual fire resistance rating depends on several factors, including:
For projects requiring a higher level of fire protection, MKS Rockwool panels with FM Approved certification and full-system fire test reports are recommended.
Rockwool provides excellent acoustic insulation due to its fibrous structure, which effectively absorbs sound waves:
It is ideal for generator rooms, noisy industrial facilities, recording studios, hospitals, and other environments requiring effective noise control, offering superior acoustic performance compared to PIR panels, which typically provide only 22–26 dB of sound reduction.
For generator rooms, a Rockwool panel thickness of 100–125 mm is generally recommended, depending on the following factors:
Generator Capacity:
Distance from Occupied Areas:
In addition, fire-rating requirements (typically 2–3 hours) and FM4880 certification requirements should be considered, particularly for insured buildings.
MKS Rockwool Sandwich Panels are water-repellent but not completely waterproof.
Suitable for:
Not Recommended For:
For high-moisture environments, it is recommended to use stainless steel facings or special anti-corrosion coatings, together with proper joint sealing to ensure long-term performance.
Rockwool panel installation requires more care than PIR installation because:
Challenges:
Recommendations:
MKS provides professional installation teams and on-site supervision to ensure installation quality meets industry standards.
| TOPIC | SPECIFICATIONS / DETAILS |
|---|---|
| Product Name |
MKS RW–C Fire proof Sandwich Panel MKS RWX–C Fire proof Sandwich Panel |
| Standard Width | 1,200 mm. (Effective Width) |
| Length Capacity | Customized per requirement / Optimized for Container Transport |
| Skin Material (Facer) |
Superdyma CRP Anti-Bacterial ZM180 Stainless Steel AISI304 PPGL / PPGI Color Steel |
| Facer Thickness |
0.45 – 0.65 mm. (APT) FM Approved Spec: ≥ 0.55 mm. (APT) |
| Available Colors | Off White (Standard) / Custom Colors Available |
| Surface Profiles | Flat (เรียบ) and Rib (ลอน) |
| Panel Thickness | 40 / 50 / 75 / 100 / 125 / 150 mm. |
| Thermal Conductivity (K) | 0.036 – 0.038 W/mK |
| Certification & Testing |
FM Approved (Standard 4880/4881/4882) BS–476 Fire Test Certified |
| PROPERTY | RW100 | RW125 | STANDARD |
|---|---|---|---|
| Compression Strength (kPa) | 120 | 140 | EN 826 |
| Density (Kg/m³) | 100 | 125 | EN 1620 |
| Tensile Strength (kPa) | 180 | 215 | EN 1607 |
| Shear Strength (kPa) | 47 | 65 | EN 12090 |
| Thermal Conductivity (k) (W/mK) | 0.033 | 0.034–0.038 | ASTM C518 |
| Fire Performance | Non-Combustible Euro Class A1 |
Non-Combustible Euro Class A1 |
EN 13501-1 |
| Application Temp Range | –30 °C to 250 °C | –30 °C to 250 °C | ASTM E794 |
| Melting Point of Core | > 1,000 °C | > 1,000 °C | ASTM C1104 |
| Water Vapor Absorption | < 0.04% by vol. | < 0.04% by vol. | EN 1609 |
| Water Absorption | < 1.0 kg/m² | < 1.0 kg/m² | EN 1609 |
*(Thermal conductivity is tested at mean temperature of 20ºC in accordance with ASTM C518 by external accredited laboratory. It is recommended to have a safety factor of 20% as design.)
** (Applications below 0ºC are only recommended, when vapour seal at warm side is adequately.)
| Thickness (mm) | U-Value (W/m²·K) | R-Value (m²·K/W) | ||
|---|---|---|---|---|
| RW100 | RW125 | RW100 | RW125 | |
| 50 | 0.66 | 0.68 | 1.52 | 1.47 |
| 75 | 0.44 | 0.45 | 2.27 | 2.21 |
| 100 | 0.33 | 0.34 | 3.03 | 2.94 |
| 125 | 0.26 | 0.27 | 3.79 | 3.68 |
| 150 | 0.22 | 0.23 | 4.55 | 4.41 |
| Thickness (mm) | 50 | 75 | 100 | 125 | 150 | |
|---|---|---|---|---|---|---|
| Weight (kg/m²) |
RW100 | 15.10 | 18.20 | 21.35 | 24.50 | 27.60 |
| RW125 | 16.75 | 19.85 | 23.00 | 26.10 | 29.25 | |
| * Estimated weight is calculated based on the standard steel thickness of 0.50/0.50 mm. | ||||||
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8 Moo 9, Nong Irun Subdistrict,
Ban Bueng District, Chonburi 20220, Thailand
1/348 Soi On Nut 59/1, Sukhumvit 77 Road,
Prawet Subdistrict, Prawet District, Bangkok 10250, Thailand
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