Step 4:
Film Application
1. Stretching Techniques:
- Stretch the film “holistically” to avoid localized overstretching (prevents
ghosting/discoloration).
- Pre-stretch metal edges for smooth corner wrapping.
- Large Curves (e.g., side mirrors): Use splicing techniques.
- For complex curves: Combine “offset stretching” and “segmented
stretching” to evenly distribute wrinkles.
2. High-Difficulty Areas:
- Blow-dry moisture and use a heat gun at **low temperature/airflow** to
gently press and shape.
Step 5:
Edge Trimming
1. Procedure:
- Rinse edges with water to remove residual solution.
- Dry thoroughly with compressed air.
- Inspect edges for contaminants (oil, particles, moisture).
- Use a heat gun on the adhesive side while pressing with a lint-free cloth.
2. Challenging Areas (e.g., sharp corners):
- Heat the adhesive with a lighter until molten, then press firmly.
- If using a heat gun: Set to 260–300°C and apply with a heat shield pad.
Warning: Avoid prolonged water exposure to the adhesive layer to maintain adhesion.
Additional Notes:
- Replace blades every 2–3 cuts for clean trimming.
- Prioritize dust-free environments to minimize contamination.
- Test heat settings on scrap film before formal application
Installation Techniques
-
I. Stretching and Corner Tucking
Maintain 15-20cm of relaxed film surface at corner tucking areas.
Avoid localized over-stretching (≤20% elongation within 10cm sections; overall
elongation ≤30%).
Trim edges promptly after corner tucking to prevent adhesive marks caused by
film spring-back. -
II. Recess Bubbling Prevention
Allow the film to naturally conform to recessed areas through adhesive selfbonding.
Use a trapezoid squeegee to flush out trapped water along recess edges.
Never perform squeegee or pressure application when the film is under tension. -
III. Seaming Techniques
Conduct pre-seaming at mirrors, recesses, and curved edges as needed.
Ensure secure adhesion at seams before proceeding to full-surface installation.
Apply adhesion promoter to pre-seamed areas if required for enhanced
bonding. -
IV. Post-Installation Care
Avoid car washes and high-speed driving during the initial post-installation
period. Some installers recommend a 72-hour curing period to prevent film
displacement or edge lifting.