Modern automotive optics is not just a functional safety element, but also a complex engineering design, the cost of replacing which can unpleasantly surprise the owner. Plastic diffuser, which replaced glass, is subject to the formation of microcracks, scratches and deep chips from road gravel, which inevitably leads to clouding and loss of transparency. Exactly. headlight It becomes the barrier that takes the brunt of the elements, maintaining the factory state of optics for many years of operation.
The use of protective materials not only avoids expensive polishing or replacement of the unit, but also preserves the initial light transmission factor, which is critical for the safety of night driving. Unlike cheap tinting analogues, specialized coatings have high elasticity, the ability to self-heal minor damage and resistance to aggressive chemicals used in car washes.
The market offers many solutions, and it can be difficult to understand them without preparation. In this material, we will discuss in detail what distinguishes polyurethane from vinyl, how to properly prepare the surface and whether it is worth taking up the pasting yourself or it is better to entrust it to professionals.
Why you need headlight protection: risks and consequences
The road surface is a constant source of abrasive particles that crash into the front of the car at high speed. Sandblast effect It occurs not only on the roads when driving behind trucks, but also in the city stream, where sand and small stones are raised by wheels in front of the cars. Over time, the surface of the headlight is covered by a network of micro-scles that scatter light and make the beam less clear.
In addition to mechanical damage, optics plastic suffers from ultraviolet light and temperature changes. Cheap headlights can begin to turn yellow in a couple of years, and the protective layer (varnish coating) - peel off. Quality flap It blocks up to 99% of UV radiation, preventing the aging of the polycarbonate from which the diffuser is made.
It is important to understand that the restoration of headlights with polishing is a temporary measure. Every time you remove a layer of plastic, you thin it, making it more vulnerable. Reservations It is a preventive measure that preserves the thickness and properties of the diffuser.
β οΈ Attention: Ignoring small chips can cause moisture to enter the headlamp body when washed under pressure or in the rain, causing fogging and failure of electronic components or lamps.
Polyurethane or Vinyl: Material Choice
The main question when choosing protection is what material to prefer. The market is dominated by two types of films: polyurethane (PU) and vinyl (PVC). Polyurethane It is considered a premium solution due to its high strength and ability to βtightenβ small scratches under the influence of heat (self-healing effect). This material is much thicker than vinyl and better cushioning stone impacts.
Vinyl films, in turn, are cheaper and easier to install due to the softer structure, but they do not have a shape memory and are worse protected from serious impacts. Vinyl is great for protection against scratches with branches or sand, but when hit by a stone at high speed, it can break through along with the headlight plastic.
Secrets of the chemical composition of films
Polyurethane films often have a multilayer structure, where the upper layer is responsible for hydrophobic properties and protection against chemistry, and the lower adhesive layer provides a tight fit without bubbles. Vinyl is a more homogeneous structure, which makes it less resistant to stretching.
When choosing, you should also pay attention to the presence of hydrophobic. It facilitates the cleaning of headlights from dirt and insects, which is especially important in the summer. Polyurethane films usually last 3-5 years or more, whereas vinyl may require replacement after 1-2 years.
| Characteristics | Polyurethane (PU) | Vinyl (PVC) | Tonic film |
|---|---|---|---|
| Thickness | 150-200 ΞΌm | 80-120 ΞΌm | 50-70 ΞΌm |
| Splinter protection | Tall. | Medium | Absent. |
| Self-healing | There's (thermal) | No. | No. |
| Term of service | 3-5 years | 1-2 years | 1-3 years |
| Price. | Tall. | Medium | Low. |
Surface Preparation: A Key Stage
The quality and durability of the adhesive protection depends on the surface preparation by 80%. Even a microscopic grain of sand left under the film will create a bump that will be noticeable and can become a point of detachment. The process begins with a thorough washing of the headlight using shampoo and a soft sponge.
After washing, it is necessary to remove all resinous spots, insect residues and bitumen. This is done by using special cleaners or isopropyl. It is important not to rub too hard so as not to damage the factory lacquer coating of the headlight. If there are already deep scratches on the surface, it is recommended to pre-polish the headlight.
βοΈ Checklist for headlamp preparation
The final stage of preparation is dusting. Often, craftsmen use compressed air or sticky wipes (antistatic) to remove the smallest villi and dust before applying the adhesive solution. Cleanliness At this point, it is critical, since the dust under the transparent film will be visible as if in the palm of your hand.
β οΈ Note: Do not use aggressive solvents (acetone, gasoline, 646th solvent) for degreasing, as they can react with the headlight plastic, causing it to cloud or crack.
Technology of glazing headlights with their own hands
glaze armored At home, it requires accuracy and the presence of a basic set of tools. You will need: a sprayer with soap solution, rakel (preferably soft and hard), a construction hair dryer, a knife with a sharp blade and lilaless wipes. The process is called the βwetβ method, as it allows you to adjust the position of the film before drying.
First, a blank with a margin of 2-3 cm is cut out at the edges. On the surface of the headlight and the glue side of the film is abundantly applied soap solution. The film is carefully placed on the headlight and positioned. Using a rakel, the master expels water from under the material, moving from the center to the edges. For complex curves used hair dryerIt heats the material, making it elastic.
Heating temperature: 80-100 Β° C (do not keep the hair dryer in one point longer than 2-3 seconds)After drying (usually 24-48 hours), the film is finally polymerized and gains its strength. It is not recommended to wash the car under high pressure.
For better sliding of the rackel and water removal, use a solution of baby shampoo (1 cap per 1 liter of water) - it does not leave stains and is safe for glue.
Typical errors in installation
Self-publishing often ends in frustration due to typical beginner mistakes. One of the most frequent. heat-up on edges and curves. If the film is not warmed up and not "planted" correctly, after a while it will begin to pick up, and there will be stuffed with dirt that cannot be washed.
The second mistake is the use of a blunt knife when cutting edges. This leads to bullies and sloppy ragged edges that catch the eye. Also, often beginners leave βlensesβ β bubbles of water that were not driven out by the rakel. Over time, mold or clouding may develop in these places.
- π« Using dirty tools or working in a dusty garage without first cleaning the room.
- π« Excessive tension of the vinyl film, which leads to its deformation and color change (the effect of the "milk" spot).
- π« Attempt to reglue the already dried film - this is guaranteed to lead to crumbs and loss of the adhesive layer.
β οΈ Note: If you use polyurethane, be careful with the temperature of the hair dryer. Overheating can lead to a change in the structure of the material or the appearance of a βshagreneβ surface.
Care for armoured headlights
Care for headlights in film is almost no different from car body care, but has its own nuances. Polyurethane And vinyl is resistant to most automotive chemicals, but abrasive polishes can not be used - they will scratch the film itself, making it matte. To clean enough soft shampoo and sponge.
To extend the service life and preserve hydrophobic properties, it is recommended to apply special applications every 2-3 months. silane for film. They fill the micropores of the upper layer, making it easier to clean the dirt and giving extra shine.
Proper care of armored film extends its life to 5 years and retains the effect of self-healing scratches.
In winter, you should avoid sudden temperature changes immediately after washing. Although quality materials can withstand frosts up to -40Β°C, the ice crust on a heated headlight can create unnecessary stress in the material.
Frequently Asked Questions (FAQ)
Does armor film worsen light transmission?
High-quality transparent film (polyurethane or vinyl) has no color and has a high transparency (about 90-95%). In practice, the driver does not notice any difference in the lighting of the road. Deterioration of light is possible only when using cheap tinting films with dimming.
Can I polish the headlights in film?
Abrasive polishing is prohibited, as it will remove the upper protective layer of the film. However, light cleaning polishing with soft compositions (finish) is permissible to remove persistent contaminants. If the film is severely scratched, it is better to replace it than polish it.
How long does the film dry after installation?
Primary grip occurs in 12-24 hours, but complete glue polymerization and moisture evaporation take 3 to 7 days depending on air temperature and material thickness. During this period, it is advisable not to wet the headlights under pressure.
Does the film protect against stones on the track?
Polyurethane film with a thickness of 180 microns successfully protects against small stones and sand. Large gravel at high speed can penetrate any film, but it will extinguish the energy of the impact, preventing cracking of the headlight plastic itself. Vinyl is less effective in such situations.