Leather Urine Odor Remover Kit L5.uk by Leather Doctor® Complete Leather Decontamination System for Absorbent Leathers Affected by Urine Stains and Odors.
Urine contamination, especially when aged, shifts leather's pH from its natural acidic state (pH 3–5) to an alkaline environment. This chemical imbalance denatures the leather's protein structure—causing tackiness, dark stains, odor, and stiffness as fatliquor leaches out. The L5.uk Kit reverses this damage holistically, restoring pH balance, softness, and appearance—just as tanneries stabilize leather during production.
- Urine odor becomes increasingly pungent as bacterial activity produces ammonia and urea.
- Tanning agents may surface, leaving dark, streaky stains and causing tackiness.
- Fatliquor (natural fats and oils) can migrate and coagulate on the surface, appearing cloudy or sticky known as leather spew.
- Alkaline pH shift weakens the leather’s amphoteric protein fibers, leading to denaturing, stiffness, and cracking.
Kit L5.uk concentrates contents require 1036g (1.14 quarts) distilled water to be mixed and filled before use with these selected leather-safe products:
✅ Urine 1.5
✅ Acidifier 2.0
✅ Urine 2.1
✅ Soft 3.8
✅ Rinse 3.0
✅ Hydrator 3.3
✅ Fatliquor 5.0+
✅ Conditioner B+
✅ Brush 1
✅ Foam 2
✅ Towel 5
1️⃣ Step 1: Urine Stain Cleaning and pH-Balancing
Products:
Purpose:
- Dissolves and removes urine deposits.
- Restores leather to its natural acidic pH.
- Stops further denaturing and prevents reversion to rawhide.
How-To:
- Apply Urine 1.5 generously over stained areas. Agitate with horsehair Brush 1.
- Towel extract repeatedly until clean.
- Follow with Acidifier 2.0 to rinse, stabilize, and restore the healthy pH.
- Detect tackiness. Continue Acidifier 2.0 application until the surface feels “squeaky-clean” to the touch.
Tip:
- Place absorbent towels beneath the leather to wick out contamination from the reverse side.
2️⃣ Step 2: Deep Decontamination and Odor Neutralization
Product:
- Urine 2.1 (pH 2.1)
Purpose:
- Chemically reacts with ammonia and alkaline salts.
- Neutralizes urine odors from within the structure.
- Restores odor-free freshness.
How-To:
- Soak contaminated area thoroughly with Urine 2.1.
- Allow to air dry naturally for full chemical neutralization.
- Sour odor dissipates after drying
- Inspect for remaining odor—repeat if necessary.
3️⃣ Step 3: General Cleaning and Residue Removal
Products:
Purpose:
- Removes general soil and chemical residues.
- pH balances and prepares leather for reconditioning.
How-To:
- Apply Soft 3.8 with Brush 1, then towel extract until the towel shows clean.
- Rinse using Rinse 3.0, following the same technique.
- Perform a finger glide test—if the surface feels uneven, repeat rinsing or finish with Acidifier 2.0.
4️⃣ Step 4: Hydration, Purging and Structural Relaxation
Product:
Purpose:
- Rehydrates dry leather.
- Purges remaining contamination through capillary action.
- Relax creases and soften stiff leather.
How-To:
- Apply Hydrator 3.3 generously and allow it to dwell.
- Towel extract until the leather feels clean and supple.
- Reapply and dwell again if necessary.
- Ready the leather for fatliquoring.
5️⃣ Step 5: Reconditioning with Fatliquor
Product:
Purpose:
- Restores essential fats and oils.
- Softens leather, prevents cracking, and enhances tensile strength.
How-To:
- Apply Fatliquor 5.0 Plus while leather is still damp from Hydrator.
- Brush and distribute evenly.
- Repeat while water content evaporates until fully saturated.
- Let dry naturally for maximum softness.
- Stretch gently with a spoon or spatula to redistribute and reduce darkening.
- Note: Skip this step for non-absorbent leathers.
6️⃣ Step 6: Surface Protection and Finishing Touch
Product:
Purpose:
- Provides a non-stick, rub-resistant finish.
- Restores buttery hand-feel and fresh leather scent.
- Enhances wear resistance and comfort.
How-To:
- Apply B+ onto a lint free towel and spread evenly.
- Allow to air dry.
- Ready to use once dry.
- Tanneries stabilize leather at pH 3–5 to preserve the protein structure and lock in fatliquor.
- When leather is exposed to alkaline substances like urine (pH 9–11), it reverts to its rawhide state.
- The L5.uk system restores tannery chemistry at the molecular level:
Example of picture showing urine damages decontaminated and refinished (before and after)!
Your opinions and insights are precious and will help us to improve to solve your leather problem more efficiently.
Updated July 8, 2024,|January 20, 2026 by Roger Koh.