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Fireproof Insulation Rock Wool

Updated: 2026-07-21

Overview

Fireproof insulation rock wool is a versatile material derived from volcanic rock, primarily basalt or diabase. It is manufactured by melting the rock at high temperatures and spinning it into fine fibers, which are then compressed into mats, boards, or loose-fill forms. The material is renowned for its exceptional fire resistance, withstanding temperatures up to 1000°C without combusting. Rock wool is widely used in construction for thermal and acoustic insulation, as well as in industrial settings for fireproofing pipes, boilers, and other equipment. Its non-combustible nature and durability make it a preferred choice for safety-critical applications.

Physical and Chemical Properties

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Rock wool exhibits low thermal conductivity, typically ranging between 0.035-0.045 W/(m·K), making it highly effective for insulation. Its fibrous structure traps air, reducing heat transfer and sound transmission. The material is chemically inert, resistant to mold, and does not absorb moisture, ensuring long-term performance. With a melting point around 1000°C, rock wool remains stable under extreme heat, making it ideal for fireproofing. It is also resistant to most chemicals, though prolonged exposure to strong acids or alkalis may degrade its fibers. The density varies from 40-200 kg/m³, allowing customization for different applications.

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Main Applications

In construction, rock wool is used for insulating walls, roofs, and floors to improve energy efficiency and soundproofing. It is also employed in fire-rated partitions and ceilings to meet building safety codes. Industrial applications include insulating boilers, pipelines, and HVAC systems to reduce heat loss and protect against fire hazards. The maritime industry utilizes rock wool for insulating ship compartments and engine rooms, where fire safety is paramount. Additionally, it serves as a noise barrier in theaters, studios, and machinery rooms due to its superior sound absorption properties.

Safety and Storage

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While rock wool is non-toxic and non-combustible, its fibers can irritate the skin, eyes, and respiratory system. Workers should wear gloves, goggles, and masks during installation or handling. Proper ventilation is recommended to minimize airborne fibers. Storage conditions should be dry and well-ventilated to prevent moisture absorption, which can reduce insulation performance. Rolls or boards should be stacked flat to avoid deformation, and loose-fill material should be kept in sealed bags to maintain quality.

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B2B Procurement Guide

When procuring rock wool, prioritize suppliers with certifications such as ISO 9001 and fire safety standards like ASTM E84 or EN 13501. Specify the required density, thickness, and fire resistance rating based on your project needs. Bulk purchases often qualify for discounts, but ensure storage capacity aligns with delivery schedules. Request product samples to verify quality and performance before large-scale orders. Compare thermal conductivity (λ-value) and compressive strength across suppliers to ensure cost-effectiveness. Lead times may vary, so plan procurement in advance for large projects.

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