How to Clean Mould Off a Leather Jacket

Finding mould on a leather jacket is unpleasant but not a disaster. Most cases are recoverable with the right approach and a bit of patience. The mistake most people make is either panicking and scrubbing aggressively, or ignoring it and hoping it goes away. Neither works.

Mould on leather needs to be removed carefully, treated to prevent regrowth, and followed up with conditioning to restore what the cleaning process takes out of the hide.

Why Leather Gets Mould

Mould is not random. It appears when specific conditions come together:

• Moisture trapped in the hide or the surrounding environment

• Poor air circulation in a wardrobe, bag, or storage space

• Organic material on the surface, including skin oils, food residue, or old conditioner

• Warm, dark conditions that accelerate spore growth

Leather is particularly vulnerable because it is an organic material with a porous surface. Leather fibres absorb and hold moisture in ways that synthetic fabrics do not. A jacket stored in a plastic garment bag in a humid wardrobe is almost guaranteed to develop mould eventually.

Step-by-Step: Removing Mould From Leather

Do not brush the mould off dry. That spreads spores across the surface and pushes them deeper into the leather grain. Work with a damp cloth from the start.

Step 1: Wipe Away Surface Mould

Dampen a clean cloth with plain water. Wipe the affected area gently in one direction, folding the cloth to a clean section after each pass. The goal is to lift the mould off the surface without spreading it further.

Do not scrub. Aggressive rubbing damages the surface finish and spreads spores.

Step 2: Treat With a Mould-Killing Solution

Plain water removes visible mould but does not kill the spores underneath. Left untreated, mould returns within weeks.

Two solutions work effectively on leather:

• Rubbing alcohol diluted 1:1 with water: apply with a clean cloth, work gently into the affected area, wipe clean

• White vinegar diluted 1:1 with water: the mild acidity kills mould spores without damaging most genuine leather surfaces

Apply either solution to the entire affected area, not just the visible patches. Mould spreads further than it appears on the surface. Allow it to sit for two to three minutes before wiping clean with a fresh damp cloth.

Always test on a hidden area first. Lighter hides can react to vinegar with minor colour change.

Step 3: Clean the Full Jacket

Spot treating the mouldy patch is not enough. If conditions were right for mould to grow in one area, spores are likely present across the whole jacket. Wipe down the entire surface with a leather cleaner or a very lightly soaped damp cloth. Pay attention to seams, folds, and the lining where moisture tends to collect.

Step 4: Dry Thoroughly

This step is critical. If the jacket goes back into storage while still damp, the mould returns.

Hang on a wide hanger in a well-ventilated space at room temperature. Allow to dry completely, which typically takes several hours. Do not use heat to speed this up.

Step 5: Condition the Leather

Cleaning and mould treatment both strip natural oils from the hide. Conditioning afterwards restores moisture, keeps the leather supple, and reduces the surface vulnerability that allows mould to take hold again.

Work a beeswax-based or lanolin-based conditioner into the entire jacket. Allow to absorb for 20 to 30 minutes, then buff off the excess.

Preventing Mould From Coming Back

Removing mould without changing the storage conditions guarantees it comes back. The fix is straightforward:

• Never store in plastic garment bags that trap moisture

• Use a breathable cotton cover if dust is a concern

• Allow airflow around the jacket in the wardrobe

• Condition regularly so the hide does not dry out and become porous

• Store away from external walls in humid climates, where condensation collects

Shearling Leather's distressed leather jackets have an open surface texture that makes them particularly prone to mould in poor storage conditions. The same applies to any jacket with a heavily worked or unsealed hide. Conditioning and proper storage matter more for these than for sealed, coated leather.

When the Mould Is Too Severe

If the mould has penetrated deeply into the hide, discoloured large sections of the jacket, or produced a persistent smell after cleaning, home treatment has limits. A professional leather cleaner can assess whether the jacket is salvageable and use stronger treatments that are not practical at home.

The sooner mould is addressed, the better the outcome. Left for months, deep mould can break down leather fibres structurally and cause damage that no amount of conditioning repairs.

FAQs

Can mould permanently damage a leather jacket? 

Surface mould caught early is usually fully recoverable. Mould left untreated for extended periods breaks down leather fibres and can cause permanent discolouration and structural damage.

Is white vinegar safe to use on leather? 

Diluted 1:1 with water, white vinegar is safe on most genuine leather surfaces and kills mould spores effectively. Always test on a hidden area first, particularly on lighter hides that may react with minor colour change.

Why does my leather jacket keep getting mould? 

Recurring mould is almost always a storage problem. Poor air circulation, humidity, and plastic garment bags are the most common causes. Changing storage conditions is more effective than repeated cleaning.

Can I use bleach to remove mould from leather? 

No. Bleach strips colour, destroys natural oils, and damages leather fibres irreversibly. Use diluted rubbing alcohol or white vinegar instead.

Does conditioning prevent mould on leather? 

Regular conditioning keeps the hide supple and less porous, which reduces vulnerability. It is not a mould-proofing treatment on its own. Proper storage and airflow are equally important for men's leather jackets and any other genuine leather outerwear.