A microscopic image of mould.


It’s more than the spores from your sixth grade science project. The spores that mould create grow and live on organic matter when in moisture-elevated environments.

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Mould found in buildings with water damage, flooding, or high moisture content can release spores that are small enough to remain airborne for extended periods. Without respiratory protection, workers can be susceptible to a number of both short- and long-term health hazards.

Products to protect against mould

Dizziness. Fatigue. Asthma. Learn how to protect yourself from the dangers of mould.

Dangers of mould

  • Dangers

    Mould is known to cause a variety of health effects if spores are inhaled into lungs, swallowed, or get into the eyes, nose or cuts.

    Health Concerns

    • Irritation of the eyes, skin nose, throat
    • Allergic affects, asthma, runny nose, eye infection, dizziness, fatigue, nausea
    • Infection of immune compromised or immune - suppressed individuals.
  • Who is concerned

    Mould remediators, people working near mould growth, industrial hygienists or consultants who conduct sampling, insurance adjusters, fire inspectors, DIYers, public health and private building inspectors assessing damage, HVAC/maintenance personnel while working around air dispenser systems and food, grain, agricultural workers.

    Severity of symptoms may depend on exposure levels and type of mould.

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  • A worker who is wearing a reusable half facepiece respirator.

    Protection against mould

    All respirator suggestions contained herein are based on data we believe to be reliable, but the accuracy or completeness thereof is not guaranteed. There is no representation, warranty, guarantee or other obligation of 3M or its employees arising out of these suggestions. 3M shall not be liable for any loss and/or damage, whether direct, indirect, incidental, special or consequential arising out the sale, use or misuse of 3M Personal Safety products or the user's inability to use such product. No respirator is capable of preventing all airborne contaminants from entering the breathing zone of the wearer. Respirators can help reduce certain airborne contaminant concentrations in the breathing zone to below the applicable Occupational Exposure Limit (OEL)* for your jurisdiction. Misuse of respirators may result in overexposure to the contaminant and cause sickness or death. Proper respirator selection, training and use are mandatory in order for the wearer to be properly protected. Use and Selection of respirators must be in accordance with the authority having jurisdiction in your country or province. Use of the Canadian Standards Association (CSA) standard Z94.4 may be used for further guidance in the selection of appropriate respirators or call 3M Technical Service at 1-800-267-4414.

*An occupational exposure limit (OEL) is the generic term for a concentration to a chemical, physical or biological substance to which it is believed a worker can be exposed day after day for a working lifetime without adverse health effects.

Reusable Respirators — To protect the user, respirator facepieces and the appropriate cartridges and or filters must be worn together.


  1. Davis, P. (2001). Molds, Toxic Molds, and Indoor Air Quality. CRB Note, vol. 8 no.1. Retrieved from https://www.library.ca.gov/crb/01/notes/v8n1.pdf on Sept. 21, 2016
  2. Government of Canada (2015). Reduce humidity, moisture and mould. Retrieved from http://healthycanadians.gc.ca/healthy-living-vie-saine/environment-environnement/air/contaminants/mould-moisissures-eng.php on Sept. 21, 2016
  3. Nelson, B.D. (2001). Stachybotrys chartarum: The Toxic Indoor Mold. The American Phytopathological Society. Online. doi: 10.1094/APSnetFeature-2001-1101 Retrieved from https://www.apsnet.org/edcenter/apsnetfeatures/Pages/Stachybotrys.aspx on Sept. 21, 2016