Bicast Leather Sticky Care System™ (B2 → B3 → B7)
Bicast leather stickiness is a progressive condition, not a one-time problem.
Leather Doctor® solves it through a 3-level modular system, based on severity:
Level 1 – Prevention & Early Stickiness
B2 Cleaning System
Level 2 – Active Deterioration
B3 Degreasing System
Level 3 – Structural Breakdown (Hydrolysis)
B7 Refinishing System
How the System Works (Cycle of Care)
B2 maintains → prevents buildup
B3 corrects → stops deterioration
B7 restores → rebuilds structure
Then returns to:
B2 for maintenance
Key Understanding (Very Important Positioning)
Sticky Bicast is not dirt — it is polyurethane failure.
Each system targets a different stage:
| Condition | Feel | Required System |
|---|---|---|
| Light tackiness | Slight drag | B2 |
| Noticeable stickiness | Grippy / dull | B3 |
| Soft / spongy / gummy | Surface deforms | B7 |
Bicast Leather Sticky Problem Guide
2️⃣ How to Choose the Right Bicast Leather Repair Kit?
3️⃣ Why Some Sticky Leather Repairs Fail (And How to Avoid It)?
Bicast Leather Sticky Degreasing (Kit B3) by Leather Doctor® is a Leather-Safe™ innovative system developed to degrease and pH balance Bicast leather from sticky deterioration.
Why Bicast Leather Develops a Sticky Problem?
Polyurethane (PU) Degradation:
- It is the PU layer that is the problem.
- Unlike genuine leather, which breathes, this plastic layer traps substances on its surface.
Oils, Grease and Sweat Reaction:
- This is one of the most common factors.
- Oils, Grease and Sweat penetrate the protective film and trigger polymer degradation, which makes the finish sticky.
Alkaline Cleaners:
- This is a crucial point.
- Overly aggressive cleaners (often alkaline) can strip away the protective agents of the PU,
- Thus accelerating its oxidation.
Hydrolysis:
- The reaction of polyurethane with ambient humidity.
- Atmospheric moisture chemically breaks down the plastic molecules,
- Creating this irreversible "gummy" texture.
Plasticizers Migration:
- The stickiness is often due to softening agents (plasticizers) which "rise"
- To the surface of the plastic film over time or under the effect of heat, creating a sticky residue.
B3 is designed to stop active deterioration caused by oil and sweat penetration.
✅ When to Use:
- Noticeable stickiness
- Dull, slightly rough feel
- Recurring tackiness after cleaning
✅ What It Does:
- Removes embedded oils and grease
- Neutralizes chemical imbalance
- Stabilizes the polyurethane layer
Kit B3: 4-Step System
Step 1 – Degreaser 2.2
Degrease oil and sweat.
Step 2 – Rinse 3.0
Rinse oil and sweat.
Step 3 – Acidifier 2.0
Stabilizing stickiness
Step 4 – Conditioner B
Reduces stickiness
Upgrade Trigger
If surface:
- Feels soft or spongy
- Remains sticky after treatment
- Shows uneven texture
Upgrade to B7 Refinishing System
Kit Contents
Add distilled water accordingly before use.
Click links for details:
Kit B3 – Simplified Instruction Flow
1️⃣ Degreasing (Degreaser 2.2)
Apply Degreaser 2.2 (ready-to-use)
Agitate with Brush 1 and actively work with Eraser 4
→ Break down and release embedded oils
Towel extract thoroughly
→ Critical: remove suspended oils, not just spread them
2️⃣ Rinsing (Rinse 3.0)
Apply Rinse 3.0 (1:40 dilution)
Agitate with Brush 1 and Eraser 4
→ Flush remaining residues
Towel extract thoroughly
3️⃣ Acidifying (Acidifier 2.0)
Apply Acidifier 2.0 (1:25 dilution)
Agitate with Brush 1 and Eraser 4
→ Neutralize and complete residue removal
Towel extract thoroughly
Repeat until tackiness is gone
➡️ Otherwise upgrade to Refinishing (Kit B7)
4️⃣ Conditioning (Conditioner B)
Apply Conditioner B (1:19 dilution)
Allow to dry to a smooth, non-stick finish
MASTER PRINCIPLE
Dwell softens — agitation releases — extraction removes
Updated July 3, 2024 | March 20, 2026 |April 13, 2026 by Roger Koh
