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 |
B2 is designed to prevent and control early-stage stickiness before topcoat damage occurs.
✅ When to Use:
- Slight tackiness
- Early residue buildup
- Routine maintenance
✅ What It Does:
- Removes sweat, oils, and residues
- Restores healthy pH balance
- Maintains a dry, non-sticky feel
3-Step System
Step 1 – Sticky 1.5
Removes surface contamination and alkalinity
Step 2 – Acidifier 2.0
Restores pH balance and stabilizes PU surface
Step 3 – Conditioner B
Reduces friction and prevents future stickiness
Upgrade Trigger
If stickiness:
- Returns quickly
- Feels heavier or uneven
Upgrade to B3 Degreasing System
$$$$$$$$$$$$$$$$
by Leather Doctor® is a Leather-Safe™ innovative system developed to keep Bicast leather from the potential stickiness problem.
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.
What are the Solution to Sticky Bicast:
1. How to Treat Bicast Leather that has Started to Become Sticky?
Step 1 Sticky 1.5:
- A pH-balanced Leather-Safe™ system,
- To remove sweat and alkalinity to prevent the leather from becoming sticky.
Step 2 Acidifier 2.0:
- A professional-grade, Leather-Safe™, pH balanced (2.0) acidifying rinse conditioner
- Scientifically designed to restore and maintain leather’s natural pH balance.
Step 3 Conditioner B:
- A Leather-Safe™ pH-balanced, (3.2) buttery feel, non-yellowing, non-stick, rub-resistant conditioner
- Scientifically formulated to enhance durability, prevent friction wear, and protect all smooth leather surfaces.
2. How to Correct Sticky Bicast Leather?
Advance Stickiness - B3 System
3. How to Restore Sticky Bicast Leather?
- Apply Sticky 1.5 (1:12 dilution)
- Brush with horsehair Brush 1
- Remove surface soiling
- Towel extract until the towel shows clean
2️⃣ Rinsing
- Apply Acidifier 2.0 (1:25 dilution)
- Brush with horsehair Brush 1
- Remove surface soiling
- Towel extract until the towel shows clean
- Repeat and inspect until tackiness is gone.
- Otherwise upgrade to Degreasing B3 system
5️⃣ Conditioning
- Apply Conditioner B (1:19 dilution)
- Allow to dry to a smooth, non-stick finish
Updated July 3, 2024 | March 20, 2026 by Roger Koh