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Electrical Insulation Rock Wool Sheet 1200x600mm 40-200kg/m³ Density Fireproof

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Electrical Insulation Rock Wool Sheet 1200x600mm 40-200kg/m³ Density Fireproof

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Brand Name : SEASTAR

Model Number : Customizable according to requirements

Certification : CNASL6673

Place of Origin : Chengdu, Sichuan, China

MOQ : 20m³

Price : 238 USD/tons (Current price)

Payment Terms : spot goods and spot payment

Supply Ability : 2000 tons/month

Delivery Time : 2-7 days

Packaging Details : wrapped with a stretched polyethylene film directly on the outside

Density : 40 - 200 kg/m³

Color : yellowish-brown

Stock Size : 1200×600（mm）

Thickness : 30mm-150mm

Electrical Insulation : Good

Noise Reduction : Good

fireproofing : Good

Hydrophobic Property : Good

Temperature Resistance : -268℃ ~ 650℃

Surface Finish : Rough

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Durable Rock Wool Boards Ideal For Long-Term Construction Projects

As a mainstream thermal insulation and fire-resistant material, the durability and persistence of rock wool boards come from their stable physical and chemical structure as well as resistance to environmental interference. Their core characteristics can be outlined in four aspects, and key factors affecting long-term performance also need attention.​

Performance

Their thermal insulation, fire resistance, and other physical properties stay stable for a long time, with excellent adaptability to extreme temperatures and humidity. Ordinary rock wool works stably between -268℃ and 700℃; it won’t deform or lose performance due to thermal expansion and contraction amid winter-summer temperature differences, making it suitable for cold and hot regions. High-quality rock wool, added with water repellents, has a volume water absorption rate below 3%. In high-humidity environments, it won’t reduce insulation performance or gain weight from water absorption, avoiding freeze-thaw damage. As a Class A non-combustible material, its fire resistance—determined by inorganic components—doesn’t weaken over time, ensuring long-term building safety.​

Advantages

Through fiber interweaving and adhesive curing, rock wool boards form a three-dimensional structure, with good compression, tensile, and impact resistance, and slow strength attenuation. They have a compressive strength of ≥40kPa (≥80kPa for high-density types), so they won’t collapse or deform permanently under long-term loads on walls or roofs, maintaining stable insulation thickness. When bonded to substrates with special adhesives (tensile bond strength ≥0.15MPa), they resist stress from temperature changes and wind pressure, reducing cracking and falling risks, which makes them ideal for high-rise external insulation. With surface reinforcement using rendering mortar and mesh, they can prevent internal fiber damage from accidental collisions.​

With proper design, construction, and maintenance, rock wool boards have a service life of over 25 years, matching the 50-year design life of buildings. For external wall insulation, if the protective layer is intact, the core material needs no frequent replacement; for industrial equipment insulation (e.g., boilers), in enclosed environments, it lasts over 30 years, cutting maintenance costs.​

In conclusion, the durability of rock wool boards lies in the chemical stability of inorganic materials, wide temperature adaptability, and anti-aging/anti-interference abilities. With standard use, they have slow performance attenuation and long service life, making them outstanding in building insulation. However, to maximize their long-term value, high-quality products, proper construction, and maintenance are essential.


Comparison of Several Construction Marerials

Comparison Items Rock Wool Board Polystyrene Board (EPS/XPS) Polyurethane Board (PU) Glass Wool Board Aerated Concrete Block
Combustion Performance Class A non-combustible (highest grade) Class B1-B2 (flame-retardant-combustible) Class B1 (flame-retardant, toxic fumes released at high temperatures) Class A non-combustible Class A non-combustible
Thermal Conductivity (W/(m·K)) 0.036-0.048 0.030-0.040 (EPS); 0.028-0.032 (XPS) 0.022-0.028 0.035-0.045 0.16-0.28
Insulation Performance Good Excellent (XPS better than EPS) Superior (best insulation effect) Good Average
Sound Insulation Performance Excellent (fiber structure blocks air and solid sound transmission) Average (low density, weak in blocking low-frequency noise) Good (closed-cell structure, slightly better than polystyrene) Good (fiber structure, mainly sound absorption) Good (porous structure, moderate sound insulation)
Mechanical Strength Compressive strength ≥40kPa, good toughness EPS compressive strength ≥100kPa; XPS ≥200kPa Compressive strength ≥200kPa, high hardness Low compressive strength (≤30kPa), easy to break Compressive strength ≥3.5MPa, high strength
Temperature Resistance Range -268℃ to 650℃ (high-temperature resistant) -50℃ to 70℃ (easy to deform at high temperatures) -50℃ to 120℃ (easy to age beyond this range) -120℃ to 400℃ -50℃ to 600℃ (high-temperature resistant)
Weather Resistance Moisture-resistant, anti-aging, adaptable to multiple climates EPS absorbs water easily; XPS shrinks at high temperatures Vulnerable to UV rays (needs protective layer), average water resistance Poor water resistance (insulation drops when wet) Moisture-resistant, good frost resistance
Environmental Friendliness Made from natural rocks, formaldehyde-free, recyclable Organic material, some contain flame retardants, hard to degrade Contains isocyanates, emission control required during production Glass fibers may irritate skin, average recyclability Inorganic material, non-toxic, recyclable
Key Advantages 1. Top-level fire resistance, high safety
2. Integrates insulation, soundproofing, and weather resistance
3. Adapts to harsh environments (high temperature, humidity, etc.)		 1. High insulation efficiency, low cost
2. Lightweight for construction, suitable for low-risk scenarios		 1. Optimal insulation performance, significant energy-saving effect
2. High strength, good integrity		 1. Excellent sound absorption, suitable for acoustic scenarios
2. Low cost		 1. Integrates load-bearing and insulation
2. Durable, same lifespan as buildings
Typical Applications External wall insulation, fire barriers, industrial pipeline insulation Internal building insulation, low-temperature storage, packaging cushioning High-end building insulation, cold storage insulation, pipeline insulation Concert halls, machine room soundproofing, ceiling filling Wall masonry, self-insulating buildings



Electrical Insulation Rock Wool Sheet 1200x600mm 40-200kg/m³ Density Fireproof


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