Knowledge Centre


Understanding Man-Made Mineral Fibres (MMMF) and Managing Workplace Exposure


Man-Made Mineral Fibres (MMMF) are synthetic fibres created from various inorganic materials, such as rock, slag, glass, or basalt. While these fibres have numerous industrial applications, it's crucial to delve into their properties, potential health effects, common sources, and effective prevention measures to ensure workplace safety.

What are MMMF?

Man-Made Mineral Fibres encompass a range of synthetic fibres with diverse compositions, including glass wool, rock wool, slag wool, and ceramic fibres. These fibres are extensively used in construction, manufacturing, and other industries due to their excellent insulating and fire-resistant properties.

Health Effects of Inhaling MMMF:

Inhalation of MMMF particles can pose health risks to individuals, primarily affecting the respiratory system. Chronic exposure may lead to conditions such as fibrosis, a scarring of lung tissue, and respiratory irritation. It is crucial for both employers and workers to understand these potential health hazards and take necessary precautions.

Products and Materials:

MMMF can be found in various products and materials, including insulation materials, fire-resistant coatings, textiles, and even automotive components. Awareness of these applications is essential for individuals working in industries where these materials are prevalent.

Industries with Common Exposure:

Workers in several industries may face potential exposure to MMMF. These include but are not limited to:

a. Construction: Use of MMMF in insulation and fireproofing materials.

b. Manufacturing: Production of MMMF-based textiles and materials.

c. Automotive: MMMF incorporated in vehicle components for insulation and heat resistance.

Understanding the industries with heightened exposure risk is crucial for targeted preventive measures.

Preventing Exposure in the Workplace:

Employers play a pivotal role in mitigating the risk of MMMF exposure in the workplace. Here are some key preventive measures:

a. Ventilation Systems: Implementing effective ventilation systems to control airborne fibres.

b. Personal Protective Equipment (PPE): Providing suitable PPE, such as respiratory masks and protective clothing.

c. Training and Awareness: Educating workers about the potential hazards of MMMF and proper safety measures.

d. Regular Monitoring: Conducting routine air quality assessments to identify and address potential exposure risks.


Man-Made Mineral Fibres contribute significantly to various industries, but their potential health risks necessitate careful management. By understanding the nature of MMMF, recognising their presence in products and materials, and implementing robust preventive measures, employers can create safer workplaces and protect the well-being of their workforce.

For further advice call us on 0870 701970 or email:

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