Product Quality Guarantee

Product: TPU Invisible Car Paint Protection Film

Dear Customer,

First of all, thank you for choosing our product.

The TPU Invisible Car Paint Protection Film is a newly developed paint protection film by our company. To ensure a worry-free purchase experience, we make the following quality guarantee:

1. The company provides customers with a stamped “TPU Invisible Car Paint Protection Film – Product Quality Standards”
2. The company guarantees that all products provided to customers have undergone strict quality inspections, meet product quality standards, and takes full responsibility for product quality. If necessary, we will provide relevant documents such as product inspection reports.
3. The company guarantees that the product will not crack, bubble, or delaminate. It will not leave adhesive residue after installation or removal. It will not develop rain stains, water spots, or discoloration. The yellowing of edges will be within the normal range, and the color difference △E ≤ 2. The warranty period is 5 years, starting from the date the product is accepted by the customer.
4. If the customer identifies non-conforming products during inspection, they should promptly report the quality issues to our company and provide relevant documentation. We will respond immediately. If the issue is confirmed to be caused by our company, we guarantee to provide replacement products that meet the quality standards within the timeframe specified by the customer.
5. The customer must strictly follow the “TPU Invisible Car Paint Protection Film – Product User Manual”for product installation and vehicle cleaning, while maintaining complete and valid installation records. If any quality issues are found during storage or installation, they should be reported to our company immediately, along with relevant documentation. If an issue occurs during installation, the customer should stop the installation and retain a sample for inspection. Upon confirmation that the issue is due to our company’s product quality, we promise a 1:1 compensation for the used portion and will process returns or exchanges for the unused portion to ensure normal product usage. Product quality issues caused by improper storage or installation by the customer are not covered under this warranty. However, we can provide fast and effective technical support upon request.
6. If consumers lodge complaints due to product quality issues, the customer should immediately notify our company and provide relevant product labels for traceability, images or videos of the issue, the installation location, frequency and quantity of the issue, as well as details of the geographical region and environmental conditions where the product was used. We will actively cooperate to resolve the issue. If the issue is confirmed to be our responsibility, we promise a 1:1compensation for the customer’s product loss. If cooperation is terminated, compensation will be provided in the form of a refund for the returned goods.
7. The company guarantees that after-sales products will be returned to the customer within the agreed timeframe.
8. This Product Quality Guaranteetakes effect upon the signing of the supply contract and remains valid during the business relationship. It will terminate upon the termination of business cooperation.

Product Quality Standards

NO.	Paint Protection Film  Test Report (7MIL)	Test Method	Test value
1	Anti-yellowing	GB/T 16422.3-2014   QUV5000 hrs	B value<5
2	Xenon lamp aging test	GB/T 32088-2015   2000 hrs	No change
3	TPU thickness	Mitutoyo Thickness meter	150±10μm
4	Coating thickness	Mitutoyo Thickness meter	15±2μm
5	Adhesive thickness	Mitutoyo Thickness meter	25±2μm
6	Release liner thickness	Mitutoyo Thickness meter	75±2μm
7	Clearcoat thickness	Mitutoyo Thickness meter	50μm
8	Overall thickness	Mitutoyo Thickness meter	330±10μm
9	Coating layer Elongation	ASTM D882	>200%
10	Finished film Elongation	ASTM D882	>300%
11	Tensile resistance	ASTM D638-2014	25Mpa
12	Tear resistance	ASTM D624-2000	100N
13	Puncture resistance	GB/T 10004	>15N
14	Gravel chip resistance	SAE J400	Pass
15	Initial adhesiveness	GB/T 4852	>1000g
16	Hold adhesiveness	GB/T 4851	>2200g
17	Gloss	3NH Gloss meter 60 degree	95GU
18	Scratch repairable	Warm water, heat gun	>45℃
19	Coating adhesion	ASTM D3359	Level 5
20	Water drop angle	Water drop angle meter	85o
21	Waterlogging resistance	GB/T 22886-2008  50℃，168 hrs	No change
22	High-temperature resistance	GB/T 7141-2008   80℃，384 hrs	No change
23	Hydrolysis resistance	GB/T 4671-2014  40℃，400 hrs	No change
24	Acid & alkali resistance	GB/T 11547-2008, soaking for 24 hrs	No change
25	Oil resistance	Spraying on surface directly for 60 seconds	No change

Product User Manual

Product Name: TPU Invisible Car Paint Protection Film

1. Installation Environment

The film must be applied in a sealed, clean, and dust-free environment to prevent dust particles from entering the adhesive layer. The installation area should be maintained at a temperature of approximately 25°C and a humidity level above 65%.

2. Installation Steps

1. Application Solution:Use Johnson’s baby shower gel (strictly avoid milk-based types) diluted in purified water at a concentration of 0.10–0.15%. The optimal solution should be evenly sprayed on the adhesive surface without shrinking or foaming.
2. Installation Plan:Develop an installation plan based on the car body shape. The recommended installation sequence is:

Roof → Front & Rear Hoods → Front & Rear Bumpers → Side Doors → Door Handles → Side Mirrors.

3. Cleaning:Thoroughly wash and treat the vehicle surface to ensure no contaminants affect the installation.
4. Inspection:Check the vehicle for any damage, ensuring the original paint is intact and free of dents, bumps, or stains. Document any defects and have them confirmed by the customer, taking photos if necessary. The protection film should not be applied to repainted surfaces that have not undergone professional baking or simple spray-painted areas.
5. Pre-cutting:Cut the film according to the vehicle model, leaving at least 5 cm of excess material for easier application. After cutting, remove the protective repair layer and roll up the film (matte release liner facing inward). Avoid using the first and last 2 meters of each roll for front and rear hoods. Secure excess film with masking tape to prevent separation of the release liner and adhesive.
6. Lubrication:While removing the release liner, spray the adhesive surface evenly with the application solution to prevent static dust attraction and ensure sufficient lubrication on the coated surface, adhesive layer, and car paint.
7. Positioning:Leave adequate excess film based on the curvature of the installation area. Stretch the film accordingly but avoid excessive stretching. Recommended maximum stretch rates:

Roof, hood, and doors: ≤10%

Front and rear bumpers: ≤15%
This ensures the material remains under normal stress.

8. Water Removal:Spray the application solution on the coated surface before using a specialized squeegee to remove water. Never dry scrape to avoid displacement, wrinkles, or scratches. Water removal should follow a top-down and center-outward principle, ensuring complete water removal in one pass to prevent trapped water bubbles. If particles are found in the adhesive layer, gently lift the film to remove them, allow the film to regain its original shape, and reapply with the application solution within 5 minutes to avoid adhesive marks.
9. Precision Cutting:Trim along the edges of each vehicle part, leaving an extra 5–10 mm. Since the product is soft and flexible, excessive stretching (above 10%) must be avoided to prevent edge shrinkage. Ensure a sharp blade and maintain a cutting angle of less than 30°.
10. Edge Sealing:Rinse the edges thoroughly with clean water. Once the edges and surrounding areas are dry, wrap the edges. If needed, use 50–60% alcohol to wipe the paint edges before applying heat with a heat gun. After wrapping, heat-seal the edges with a heat gun (do not exceed 80°C).
11. Final Inspection:Perform a comprehensive check of all installation areas, clean the film surface, and complete the process.

3. Maintenance & Care

1. Avoid washing the car within three daysafter installation and do not drive in rainy or snowy conditions to prevent the film from peeling due to trapped moisture.
2. To prevent staining, promptly remove any liquid contaminants from the film surface.
3. If bird droppings, insect remains, or similar contaminants appear on the film, clean them immediately. Use hot air (~60°C)to assist in stain removal.
4. Wash the car weeklyusing a neutral detergent (avoid simple rinsing with water).
5. In summer, do not park the vehicle under dripping air conditioners. If exposed to rain, wash the car the same day.
6. Avoid prolonged exposure to direct sunlight.
7. In snowy conditions, remove accumulated snow from the vehicle before starting the engine.
8. Apply car waxevery 1–2 months for maintenance (recommended brands: 3M 39528, Turtle Wax G-2011DA). Do not polish.
9. When replacing the film, allow the vehicle to return to normal temperature (especially the front hood) before removal. Peel at a 180° angle, cutting into 30 cm-wide stripsfor slow, even removal to prevent adhesive residue.
10. Minor scratches on the film surface self-heal at temperatures above 40°C. In winter, use ~45°C warm water or hot airfor quicker repair.