Product Overview
Leather Mold Killer Kit A3.mk by Leather Doctor is a fungicide system that cleans, conditions, kills, disinfects, sanitizes, and deodorizes mold on leather.
Mold is a living organism detected by its characteristic musty odor and moldy appearance including leather and suede. Mold grows from water-damaged or after cleaning with alkaline products that destabilize its mild acidic neutral pH3-5, with surface soiling, and storing in a humid condition promotes mold growth. Molds cause the biodegradation of leather. Mold growth draws nutrients from the leather weakening its tear strength. A progressive infestation of mold on leather will result in unsightly dark sinking pits that may require physical removal with refinishing. Mold growth is prevented by keeping leather within a pH range of 3-5 and controlled by a preventive anti-fungal treatment with Leather Mold Killer 3.6 when leather is put in storage. Antimicrobial control for mold on leather is similar to administering antibiotics, which must be treated on an 8-month cycle to prevent re-occurrence in the long term.
An effective mold decontamination process would include the following dovetailing sequence. Mold growth is removed, contained, and disposed of responsibly for health and the environment. Eraser 4 erases with good traction to remove the remaining residue. Prep 4.4 is an option for overall prep cleaning before cleaning with Mold 1.5. Mold 1.5 is cleaned and rinsed with Acidifier 2.0 before anti-fungal treatment with Mold 3.6. Cleaner 3.8 followed by Rinse 3.0 cleans and rinses general soilings. Mold 3.6 fungicide treatment disinfects and controls musty mold activities after decontamination cleaning. Hydrator 3.3 relaxes the leather plumps before fatliquoring with Fatliquor 5.0 Plus. Fatliquor 5.0 Plus replenishes the fat and oil for leather softness when dry. Protector B Plus is a nonstick, rub-resistant buttery feel conditioner with a leather scent.
Instruction:
Prep 4.4 a leather-safe pH4.4 restorative cleaner, works on general accumulated soiling and aged conditioners (optional).
1.1: Prep 4.4 is applied thinly and works with a horsehair brush and eraser on heavily soiled areas.
1.2: Prep 4.4 suspended soiling is towel extracted before dries until it shows clean and continues general cleaning with Cleaner 3.8.
Mold 1.5 is apH1.5 mold growth clean-up before a long-term fungicidal treatment with Leather Mold Killer 3.6 on leather and suede. Its low pH discourages mold growth and strengthens the leather's ionic positive (+ve) attraction with the ionic negative constituents like the tanning agent and the fat liquor. Suspended residues are rinsed by towel extraction to a healthy squeaky feel with Acidifier 2.0.
2.1: Mold 1.5 concentrate 1: 12 is mixed with 209g distilled water or 1.5 inches from the top of the 8oz bottle before use.
2.2: Mold growth is removed, contained, and disposed of responsibly.
2.3: Mold 1.5 is applied, brushed, and erased for an even appearance to the entire section, towel extracted until clean, and proceed to rinse with Acidifier 2.0.
Acidifier 2.0 is a pH2.0 acidifier rinse for controlling, neutralizing, and pH-balancing leather chemistry integrity against mold growth.
3.1: Acidifier 2.0 concentrate 1: 25 is to be mixed with 218g distilled water or 1.5 inches from the top of the 8oz bottle before use.
3.2: Acidifier 2.0 is applied directly, brushed, and extracted with a towel until clean.
3.3: Acidifier 2.0 is kept for 3 to 30 minutes to neutralize and stabilize leather pH.
3.4: Acidifier 2.0 treatment is complete with a test for a healthy squeaky feel, ready for other processes.
Cleaner 3.8 is a leather-safe pH3.8 mild cleaner that is particularly effective in emulsifying and suspending oily soils without common side effects. It works over after Prep 4.4 and extends the entire section without leaving a dry edge. Cleaner 3.8 holistic cleaning and rinsing sequence with Rinse 3.0 returns residue free to its pH chemistry integrity.
4.1: Cleaner 3.8 concentrate 1: 64 is mixed with 224g distilled water or 1.5 inches from the top of the 8oz bottle before use.
4.2: Cleaner 3.8 is applied and brushed with a horsehair Brush 1.
4.3: Cleaner 3.8 suspended soiling is extracted with a dry absorbent towel until it shows clean and proceed to rinse with Rinse 3.0
Rinse 3.0 is a pH3.0 rinse for removing suspended soil and strengthening the pH chemistry integrity of leather. It removes suspended soiling by towel extraction while neutralizing harmful alkaline residues and charging the leather ionic positive (+ve) to increase the attraction between the ionic negative (-ve) tanning agent, dyestuff, and fat liquor from tackiness, bleeding, and stiffness.
5.1: Rinse 3.0 concentrate 1: 80 is mixed with 224g distilled water or 1.5 inches from the top of the 8oz bottle before use.
5.2: Rinse 3.0 is applied, brushed, and suspended soiling is extracted with a dry absorbent towel and ready with other processes.
6: Leather Mold Odor Killer 3.6
Mold 3.6 is a pH3.6 leather-safe fungicide that kills, deodorizes, and controls long-term mold growth by disinfecting and controlling musty odor from mold activities after cleaning decontamination.
6.1: Mold 3.6 concentrate 1: 9 is mixed with 204g distilled water or 1.5 inches from the top of the 8oz bottle before use.
6.2: Mold 3.6 is applied, brushed for an even appearance, dried naturally overnight, and inspected for satisfaction, otherwise repeat treatment accordingly.
Hydrator 3.3 is a pH3.3 hydrating conditioner to relax and stretch out the stiffness, creases, and wrinkles before fat liquoring. It facilitates colloidal water movement, reactivating the dormant dyestuff to resurface and reducing surface inter-facial tension for an even appearance.
7.1: Hydrator 3.3 concentrate 1: 25 is mixed with 218g distilled water or 1.5 inches from the top of the 8oz bottle before use.
7.2: Hydrator 3.3 is applied and brushed with a deep even saturating appearance, massaged, and stretched to dimension, before proceeding with fatliquoring.
Fatliquor 5.0 Plus is a pH5.0 micro-emulsion of fat, oil, and water for conditioning leather to its original softness and strength with a classic leather scent. In application, the water-encased fat and oil molecules break free when the attraction between the leather protein fibers takes place. The excess free water wicks out leaving a breathing space behind for Nubuck's natural transpiration.
8.1: Fatliquor 5.0 concentrate 1: 5 is mixed with 189g distilled water or 1.5 inches from the top of the 8oz bottle before use.
8.2: Fatliquor 5.0 is applied and redistributed with a brush or pad for even saturation and leaves to dry naturally.
8.3: Fatliquor 5.0 is repeated each cycle water contents evaporate leaving behind the fat and oil content until it absorbs no more.
8.4: Fatliquored leather fullness allows natural drying for extra softness.
8.5: Fatliquored desired suppleness is further staked, massaged, and flexed accordingly with a little wet back with Hydrator 3.3 until dry.
9: Leather Scent Protector B Plus
Protector B Plus is a scented buttery-feel, non-stick, rub-resistant conditioner that reduces wear and rubbing noises on leather with a classic leather scent. Its non-film-forming maintains the leather's essential breathability for wearing comfort; helps stop the squeaking noises when leather comes into contact, and reduces and helps release those tenacious dye-transfer stains, much more easily. Its natural buttery-feel protection increases the leather's resistance to wet and dry rubs, thus reducing stretch, scuff, and abrasion.
9.1: Protector B Plus concentrate 1: 15 is mixed with 212g distilled water or 1.5 inches from the top of the 8oz bottle before use.
9.2: Protector B Plus is applied and spread by brushing or padding and is ready to use when dry.
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Updated January 20, 2025, by Roger Koh.