The appearance of the first chips on the top of the rapids after the first trip on a gravel track or winter operation signals that the regular paint coating is not enough to protect the metal. It is at this point that car owners decide to apply an additional protective layer to prevent the spread of corrosion and maintain a presentable appearance of the body. Self-painting with armored film of the rapids is the most affordable way to create a reliable barrier between an aggressive external environment and factory paint, while maintaining the factory color of the car.
The process of installing protection requires not only accuracy, but also an understanding of the properties of the materials used, since polyurethane or vinyl film has its own installation features. Incorrect surface preparation or violation of the temperature regime during operation can lead to flaking of the edges or the appearance of bubbles, which will negate all efforts. Unlike professional deli-ling centers, home craftsmen are often limited in tools, but with proper preparation and adherence to technology, you can achieve a result close to ideal.
In this guide, we will analyze all the stages of work: from the choice of material thickness to the final polymerization of the coating. You will learn what tools are really needed and what you can do without, and how to avoid the typical mistakes that beginners make when you first try to book a body.
Material choice: Polyurethane or vinyl for threshold protection
The first and most important step is the right choice of material, since the durability of protection and its ability to withstand mechanical stress directly depend on this. There are two main types of films on the market today: polyurethane (PU) and polyvinyl chloride (PVC). Polyurethane It is considered the “gold standard” for protecting areas with a high risk of impact, as it has high elasticity, is able to “tighten” small scratches under the influence of heat and withstands serious gravel impacts.
Vinyl films, in turn, are cheaper and easier to install, but their protective properties are much inferior to polyurethane. They protect well from sand and fine abrasive, but with a strong stone impact they can break through, transferring the energy of the impact to the varnish and metal. For the rapids that take the brunt of the wheels ahead of the cars, It is recommended to use a polyurethane film with a thickness of at least 200 micronsThis will ensure maximum protection effectiveness.
When choosing a material, you should also pay attention to the presence of a protective lacquer layer, which gives the film a glossy shine and additional resistance to chemical reagents.
- 🛡️ Polyurethane: High strength, self-healing effect, service life up to 10 years, high price.
- 🎨 Vinyl: Good color reproduction, low cost, protection only from sand and scratches, service life of 3-5 years.
- 🌡️ Heat resistance: Polyurethane can withstand a wider range of temperatures without losing elasticity.
⚠️ Attention: Cheap analogues of polyurethane can turn yellow under the influence of ultraviolet light after a year of operation. Buy materials only from proven brands and require quality certificates.
Brand comparison
Should I pay more for the famous brands of films? Yes, since the adhesion of the adhesive layer in premium materials is more stable, and the risk of “orange peel” is minimal.
Tools and workplace preparation required
The quality of the pasting directly depends on the preparation of the workplace and the availability of a specialized tool, without which proper work with the film is impossible. The ideal option is to have a warm, well-lit garage with a clean floor, as any speck of dust caught under film will stay there forever. If there is no garage, you can work outside in windless weather, but the air temperature should not be lower than +15 ° C, so that the material retains elasticity.
To work, you will need a set of tools that you can assemble yourself or purchase a ready-made kit for pasting. The key element is hair dryer, which is necessary for activation of the adhesive layer and stretching of the film when tightening complex shapes. Also irreplaceable. raster-knife (hoof knife) for cutting the film without damaging the varnish and distillation to remove air and moisture.
Additionally, you will need a degreaser, lilaless wipes, a spray spray with soap solution and magnets for fixing the film during cutting.
- ✂️ Cutting tool: Special vinyl knife or stationery knife with interchangeable blades.
- 🔥 Heater: Hair dryer with temperature adjustment so as not to overheat and melt the film.
- 💧 Liquids: Isopropyl alcohol for degreasing and mounting liquid (water with a drop of shampoo).
| Tool. | Appointment | Importance |
|---|---|---|
| Construction hair dryer | Heating and activation of glue | Critically. |
| Raquel with felt | Extraction of air | Tall. |
| Hoof knife | Cutting without scratches | Medium |
| Microfiber | Washing and drying | Tall. |
Detailed preparation of the threshold surface
Surface preparation is the stage where 80% of the success of the entire operation is laid, as any dirt, grease or wax will lead to detachment of the film in the future. You should start with a thorough car wash, paying special attention to the lower part of the sills and wheel arches, where the dirt accumulates most. After washing, you must use car-shampoo Or a special bitumen stain cleaner to remove all technical contaminants.
The next step is deep cleaning and degreasing. Even if the surface appears clean, it may still have silicones from polishes or hand marks. Use isopropyl alcohol or a special degreaser, rubbing the surface with a lilac-free napkin in one direction. It's important. do not miss places near moldings and joints of plastic, where dirt often accumulates.
⚠️ Note: Do not use aggressive solvents like acetone or 646th solvent, as they can damage the paint coating or make it matte.
If there are deep chips to metal on the thresholds, they must be pre-painted with a restoration pencil and let dry, otherwise corrosion will begin under the film.
☑️ Checklist of preparations
Open the films and fitting templates
Once the surface is ready, it is necessary to move on to the material, which requires accuracy and care. There are two main methods: pasting ready-made sets cut on the plotter, and self-cutting on the spot. Ready-made sets are convenient because they already have the desired shape, but often require refinement or do not perfectly repeat the geometry of a particular body. Self-cutting gives more freedom, but requires skill with a knife.
When working with polyurethane film, it is important to take into account its ability to stretch, so cut out parts with a margin of 2-3 cm on all sides. fitting It is made "dry" or using a mounting fluid to make sure that the film covers all the necessary areas. If you use the method of pasting "won-roll", the film can not be cut in advance, but cut off the roll with a margin and cut already in the process of installation.
For complex forms of rapids with sharp edges, it may be necessary to use several pieces of film, since it is almost impossible to cover a sharp angle with a single canvas without the formation of folds.
- 📏 Stock of material: Always leave 3-5 cm of stock for turning edges under the arch or the bottom of the threshold.
- 🖐️ Hand cleanliness: Work with gloves so as not to leave greasy marks on the adhesive layer.
- 🌡️ Film temperature: Before opening, let the roll heat up to room temperature so that it is not too rigid.
It is better to cut less and add a piece than to cut too much and spoil expensive material.
Application technology: wet and dry method
There are two main ways of applying armored film: wet and dry, each of which has its own advantages and scope. Wet method It is more often used by beginners and when working with large planes, since it allows you to adjust the position of the film until it is completely dry. To do this, the surface and the adhesive layer are abundantly moistened with a soap solution, the film is laid in place, positioned, and then expelled by the racket.
Dry method It requires high speed of work and experience, since the film is glued instantly and it is no longer possible to move it. This method is often used for active adhesive polyurethane, which requires heating to activate. In any case, start the squeezing from the center to the edges, gradually removing fluid and air. Special attention should be paid to the edges and complex shapes, warming them with a hairdryer and stretching the material.When purging, use reciprocating movements with the racket, controlling the force so as not to damage the film and leave no cracks.
⚠️ Note: When using the wet method, be sure to let the film dry for 24-48 hours before washing the car under pressure.
Advice pro: If there is a bubble of air under the film that does not go away, gently puncture it with a thin needle and roll.
Polymerization and care of protective coating
After the pasting process is completed, the film does not end, since it takes time for final polymerization and strength gain. In the first day after installation, it is not recommended to wet the car or expose it to aggressive chemicals. Polymerization The adhesive layer occurs within 24-72 hours depending on the ambient temperature and the type of material used.
In the future, the care of armored film is practically no different from the care of ordinary varnish, but has its own nuances. Conventional automotive chemicals can be used for washing, but avoid abrasive polishes and hard brushes that can leave matte marks on the surface of the film. It is recommended to apply special silant-spray or waxes for films that restore hydrophobic properties and facilitate cleaning of dirt.
With proper care and operation, the armored film retains its protective properties and transparency for 5-10 years, after which it can be replaced without damaging the factory varnish.
- 🚿 Wash: High pressure washing is allowed, but the jet should be kept at an angle so as not to undermine the edges.
- 🧴 Chemistry: Avoid products containing solvents or abrasive particles.
- ☀️ Parking: For the first few days, try not to park your car in the scorching sun to avoid uneven drying.
How often should the armor film be polished?
Special polishing of the film is not required, as this can remove the protective lacquer layer. It is enough to use restorative sprays once every 2-3 months.
Can I get the doorsteps in winter?
It is strictly not recommended to work at temperatures below +15 ° C, since the film becomes rigid, and the glue is not activated properly.
What if the film starts to move away at the edge?
It is necessary to clean the edge of dirt, degrease, warm up with a hair dryer and press tightly. If the glue has lost properties, you will need to stick a special primer.