Leather Strong Prep Cleaner 7.7

 Leather Strong Prep Cleaner 7.7 by Leather Doctor® is a pH 7.7 mild alkaline preparatory cleaner designed for non-absorbent leathers as part of a leather-safe cleaning and rinsing system that ensures proper pH balancing (3-5) to maintain leather integrity.

 Prep 7.7 Key Features & Benefits:

• Deep Penetration & Lubrication – Effectively breaks down accumulative soiling without excessive agitation
• Safe for Non-Absorbent Leathers – Designed for coated leathers where deep absorption is not required
• pH-Balanced System – Works holistically with Soft 3.8 and Rinse 3.0 to restore leather’s pH balance
• Tackiness Rectification – Acidifier 2.0 effectively neutralizes previous alkaline overexposure, restoring a healthy, squeaky feel

 Recommended Cleaning Process:

• Apply Prep 7.7 – Allow dwell time for deep penetration and soil suspension
• Follow with Soft 3.8 – Removes sticky residue and emulsified soiling
• Neutralize with Rinse 3.0 – Restores pH balance for a healthy, residue-free finish
• Use Acidifier 2.0 (if needed) – Corrects tackiness caused by alkaline overexposure

This non-aggressive yet powerful cleaner preps leather surfaces for optimal maintenance and refinishing. 

 For Stubborn Greasy Stains with Dye Components: 

When dealing with persistent stains such as ballpoint ink, blue jean dye, crayon, leather belt marks, plastic ink prints, newsprint, and stamp pad ink, follow up with Dye 7.9 for optimal stain removal.  

 Instruction:

1. Prep 7.7 is transfer to a foam brush, spread and agitate in a circular motion with a horsehair brush and towel extract until the towel shows clean.
2. Soft 3.8 is applied and work in a circular motion and towel extract suspended soiling until the towel shows clean.
3. Rinse 3.0 is applied, work in a circular motion, and towel extract until it shows clean to a healthy squeaky feel.
4. Acidifier 2.0 a strong pH balancer is an option to achieve a healthy, squeaky feel.
5. Protector B completes the restorative cleaning with a nonstick rub-resistant buttery feel condition.

 People Also Ask:

1. How Reverse Transfer Technique Works with Prep 7.7?
2. How does Prep 7.7 work with Dye 7.9 in Ballpoint Ink Removal?
3. How to Remove Prep 7.7 Sticky Residue?
4. What Stain Does Prep 7.7 Work?
5. What Stain does Prep 7.7 need Dye 7.9 to continue working?

Updated: March 19, 2025 | June 7, 2025 | October 9, 2025 by Roger Koh.