For car paint glazing, low to medium amine value amino silicone oil (0.2–0.6 mmol/g) is preferred. High amine value (>1.0 mmol/g) is not suitable for long-term outdoor paint surfaces.
1. Effect of Amine Value on Paint Finish
Low Amine Value (0.2–0.4 mmol/g)
✅ Advantages:
- Extremely low yellowing risk
- Excellent weather resistance
- Long-lasting gloss
- Low hazing tendency
- Ideal for light-colored / white car paint
- Moderate adsorption, uniform film formation
- Good water repellency and anti-fouling performance
- Smooth, silky feel
❌ Disadvantages:
- Slightly lower adhesion and durability than medium amine value
Medium Amine Value (0.4–0.6 mmol/g)
✅ Advantages:
- Best overall performance
- Strong adsorption, high gloss, good durability
- Balanced water repellency, anti-fouling, and antistatic properties
- Suitable for most car paints (black, silver, red, etc.)
- First choice for daily glazing
❌ Disadvantages:
-
Slight yellowing under long-term sun exposure;
requires antioxidants / UV absorbers
High Amine Value (>1.0 mmol/g)
✅ Advantages:
- Very strong adsorption, thick film, intense short-term gloss
❌ Critical Disadvantages:
- Highly prone to yellowing (rapid yellowing under UV / high temperature)
- Prone to dulling, greasy / rough feel
- Poor weather resistance
- Not suitable for outdoor use
- Only for temporary / indoor display; not recommended for daily maintenance
2. Recommendations for Car Glazing Selection
-
Daily maintenance / long-term outdoor use:
Medium amine value 0.4–0.6 mmol/g(balanced gloss, durability, and anti-yellowing)
-
Light / white paint / anti-yellowing priority:
Low amine value 0.2–0.4 mmol/g(weather resistance first)
-
Temporary brightening / indoor show cars:
High amine value can be used short-term,not recommended for long-term use
3. Additional Key Points
-
Prioritize tertiary amino / phenyl-modified amino silicone oil
for better weather resistance and anti-yellowing performance.
- Use with antioxidants + UV absorbers to significantly improve durability.
-
Recommended viscosity: 500–2000 mPa·s,
balancing leveling and film thickness.
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