Bicast Leather Sticky Cleaning (Kit B2)

 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:

 

✅ 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

---

✅ 1. VISUAL DECISION CHART 

Which Kit Do I Need?
(Bicast Leather Sticky Problem Guide)

START HERE ↓

Is the surface slightly tacky or dragging?
│
├── YES → Use B2 Cleaning System
│ (Early-stage residue buildup)
│
└── NO ↓

Does the surface feel sticky, dull, or uneven?
│
├── YES → Use B3 Degreasing System
│ (Oils have penetrated and deterioration has started)
│
└── NO ↓

Does the surface feel soft, spongy, or “melting”?
│
├── YES → Use B7 Refinishing System
│ (Polyurethane structure has broken down)
│
└── NOT SURE?
→ Start with B2 → escalate if needed

---

✅ 2. “WHICH KIT DO I NEED?” 

How to Choose the Right Bicast Leather Kit
Bicast leather stickiness develops in stages.
Choosing the correct system ensures success.

---

 Choose B2 Cleaning System if:

• Surface feels slightly tacky
• Stickiness is recent
• No soft or spongy feel
• Happens mainly in high-contact areas

✅ This is preventive and early correction

---

 Choose B3 Degreasing System if:

• Stickiness is obvious and persistent
• Surface looks dull or uneven
• Cleaning no longer solves the issue
• Oils and sweat have likely penetrated

✅ This is active correction

---

 Choose B7 Refinishing System if:

• Surface feels soft, spongy, or rubbery
• Leather feels like it is “melting”
• Sticky even after degreasing
• Finish looks worn or degraded

✅ This is structural restoration

---

 Still Unsure?

Start with B2 Cleaning System.

If the problem remains:
→ Upgrade to B3, then B7 if necessary

This ensures the safest and most effective approach.

---

✅ 3. B7 FAILURE PREVENTION (CRITICAL – BASED ON REAL CASES)

 Why Some Sticky Leather Repairs Fail (And How to Avoid It)

Sticky Bicast repair can fail — not because of the product, but due to process gaps.
Here are the most common causes and how to avoid them:

---

 1. Incomplete Removal of Deteriorated Topcoat

Problem:
Old polyurethane remains active underneath

Result:
New coating stays sticky or does not cure

✅ Solution:

Use Buffer 3 thoroughly

 Continue until residue becomes fine white powder
 This indicates unstable PU has been removed

---

 

 2. Applying Topcoat Too Thick

Problem:
Heavy layers trap moisture and prevent curing

 

✅ Solution:

Apply thin, even coats only
Allow proper drying between layers

---

 

 3. Skipping Proper Drying Time

Problem:
Moisture interferes with crosslinking

 

✅ Solution:

Allow 2–3 hours between coats
Cure 24–48 hours before use

---

 

 4. Low Temperature or High Humidity

Problem:
Slows or prevents proper curing

✅ Solution:

Ideal temperature: 20–25°C
Ensure airflow (fan), avoid cold environment

---

 

 5. Insufficient Prep Application

Problem:
Contamination remains under coating

✅ Solution:

Ensure proper degreasing
Visible transfer to towel is expected

---

✅ Professional Insight

Sticky bicast is a surface failure problem, not just a cleaning issue.

Successful repair depends on:
 Removing instability
 Rebuilding with controlled thin layers

 

 

 

Bicast Leather Sticky Preventive Cleaning Kit B2 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?