Leather Properties and Care
Is Mold on Leather Dangerous?
For most people the risk is low, but mold on leather can trigger allergies, asthma and irritation, and it destroys the leather. Who is at risk and what to do.
It can be, mainly for people with mold allergies, asthma or a weakened immune system. Mold produces allergens, irritants and in some cases potentially toxic substances (mycotoxins), and can irritate the eyes, skin, nose, throat and lungs even in people who are not allergic. Most people breathe in mold spores without harm. Mold is also a danger to the leather itself, because it slowly destroys what it grows on.
This answer is part of our hub on leather properties and care.
Who is at risk
If you have health concerns, talk to a health professional before you clean anything.
| Person | Main risk | Fact |
|---|---|---|
| Most healthy adults | Usually none from inhaling spores; possible eye, skin, nose, throat or lung irritation | – |
| People allergic to mold | Allergic reactions, immediate or delayed | – |
| People with asthma who are allergic to mold | Asthma attacks | – |
| People with weakened immune systems | Invasive mold infections, which are rare but severe | – |
Is white mold dangerous?
First check that it is mold. White bloom on leather is often fatty spew, which is harmless to the leather and looks waxy rather than fuzzy. Our guide to leather spew vs mold has three checks. If it is mold, treat it as mold whatever its color.
Killing mold is not enough: dead mold can still cause allergic reactions, so it has to be removed.
The danger to the leather
Mold gradually destroys the material it grows on. Leather is porous, and porous items may have to be thrown away if mold gets into them, because it can be hard or impossible to remove fully. Staining may stay even after cleaning. For an expensive or sentimental piece, the EPA suggests a restoration or conservation specialist.
Handling moldy leather safely
- Protect yourself. Avoid breathing the spores or touching mold with bare hands; the EPA suggests an N-95 respirator, gloves and goggles.
- Skip routine bleach. The EPA does not recommend biocides such as chlorine bleach for routine mold cleanup, and bleach must never be mixed with other cleaners.
- Ask first if you are at risk. The CDC names weakened immunity as the risk group for invasive mold infections, and the EPA says to see a health professional before cleanup if you have health concerns.
The cleaning steps are on hosob.com: how to remove mold from leather.
Leather Repair Company, a UK leather repair and care business, shows a technician in a mask, goggles and gloves wetting moldy leather before blotting it so dry spores do not spread, then bagging used rags and gloves and wiping down tools; it also says to use only a HEPA-filtered vacuum. The mold remover and alcohol cleaner it uses are the company's own choice, not a recommendation from this page, and it does not use bleach.
Does leather grow mold?
Yes, when it stays damp. Keep indoor humidity below 60% (ideally 30 to 50%) and dry wet items within 24 to 48 hours. Prevention is covered in how to identify and prevent mold on leather. Leather Collection's care instructions say to store leather in a cool, dry, well-ventilated place and let wet leather dry at room temperature. If your leather smells musty, compare it with what leather should smell like.
FAQ
What household products kill mold?
The EPA does not recommend bleach or other biocides as a routine step; removing the mold and fixing the damp matters more.
What are the first signs of mold sickness?
The EPA lists allergic reactions, asthma attacks in mold-allergic people with asthma, and irritation of the eyes, skin, nose, throat and lungs. If you have symptoms, see a health professional.
HitKB Editorial Team
HitKB articles are researched from published sources, cited in the text, and reviewed before publication.