Leather Strong Cleaner 4.3

Leather Strong Cleaner 4.3 (Strong 4.3) by Leather Doctor® is a pH 4.3, water-based strong leather cleaner, specially formulated for periodic deep cleaning of heavily soiled leather, especially in high-use areas.

It provides a balanced cleaning strength, positioned between:

• Super 4.9  (stronger), and
• Cleaner 3.8 (milder).

How It Works

1. Penetrates embedded soiling.

2. Lubricates to release dirt.

3. Suspends foreign contamination.

4. Requires sufficient dwell time (3–30 minutes).

5. Works in sequence with Cleaner 3.8 for residue removal.

6. Final rinse with Rinse 3.0 ensures a leather-safe, pH-balanced result.

Where to Use It

Effective on all leather types:

• Vachetta
• Aniline
• Pigmented 
• Nubuck
• Suede
• Hair-on-hide (suede side)

Cleaning Sequence

1. Dry Soil Removal

• Brush or vacuum loose particles.

2. Application

• Dilute concentrate with distilled water at ratio 1: 64 before use.
  

• Shake well, apply, agitate with suitable brush.

3. Dwell Time

• Let it dwell 3–30 minutes, ensuring it doesn’t dry on the leather.

4. Soil Extraction

• Wipe suspended soil with a dry absorbent cotton terry towel.

5. Residue Removal

• Clean remaining residue with Cleaner 3.8.

• Rinse with Rinse 3.0 until towel shows clean.

For Stubborn Soiling

• Use Prep 4.4 (absorbent leathers like aniline, nubuck, suede, vachetta).

• Use Prep 7.7 (non-absorbent, pigmented leathers).

Tools to Use

Brushes 

Erasers

After-Cleaning Care

Updated: June 2, 2025 by Roger Koh