Noise in the cabin, arising when the engine is running at high speeds or when driving on an uneven road, often indicates the resonance of metal body panels, which is eliminated only by competently sticking the vibrodempfer. If this symptom is ignored, vibrations will be transmitted to the plastic of the cabin, causing it to rattle and tire the driver. Correctly selected and installed vibrating converts the energy of mechanical vibrations into heat, significantly reducing the overall noise level and increasing acoustic comfort. Unlike simple noise insulators, this material requires strict adherence to installation technology, otherwise it will not work or, worse, will lead to corrosion of the metal.
The pasting process begins long before the purchase of a roll of materials, as the key to success is surface preparation. The metal must be perfectly clean, fat-free and, if necessary, dry to ensure the adhesion of the bitumen or mastic base. Errors in the preparation phase often lead to peeling of the material after several months of operation, especially in areas with temperature changes. In this instruction, we will analyze not only the process of sticker, but also the nuances of thickness selection, body zoning and typical mistakes of beginners.
Principle of work and choice of materials
The basis of any vibrodempfera is a viscoelastic material, most often bitumen or mastic, which is applied to foil or paper base. When exposed to vibration, the molecules of this layer rub against each other, converting mechanical energy into thermal energy, which extinguishes the resonance. The effectiveness of the material depends on its weight and thickness, but blind weighting of the body can lead to sagging doors or increased fuel consumption. It is therefore important to understand that vibrating It is a balance between the weight and effectiveness of the low-frequency hum.
There are many brands on the market today, such as StP, Shumoff or VibroplastEach of them has different sizes. For floors and wheel arches, thicker materials (3-4 mm and above) are usually used, as there is the greatest amplitude of vibrations. For roofs and doors where weight is critical, lightweight versions with a thickness of 2 mm are chosen. It is important to pay attention to the presence of antiadhesive layer (polymer mesh or paper) that prevents the material from sticking to itself during storage and facilitates installation.
Quality material should maintain elasticity in a wide range of temperatures, do not crack in the cold and do not “swim” in the heat. Cheap analogues based on tar can in hot weather drain into the lower points of the body, polluting the cabin and losing their properties. When choosing, be sure to check the certificate of conformity and the absence of a sharp chemical odor, which may indicate the use of toxic components.
⚠️ Warning: Never use building bitumen or tar without special preparation and reinforcement, as over time they dry up and stop working, and can also release harmful substances.
The effectiveness of vibration insulation is checked by tapping: properly pasted metal emits a deaf, short sound, while a clean sheet rings. This acoustic effect is the main goal in the tuning of the car. Do not save on materials for areas with high vibration load, as the rework will take much more time and money.
Tools and training required
Before you start dismantling the cabin, you need to collect a full set of tools so that the process does not stop halfway. The main tool for rolling the material is a solid rubber roller, which allows you to evenly press the vibrodempfer to the metal, expelling all the air bubbles. You will also need an industrial dryer to heat the material and metal, a scissors or a construction knife to cut, and a set of degreaser.
Surface preparation is 80% of the success of the entire operation. Metal must be thoroughly cleaned of factory mastic, dirt, oil and, most importantly, from rust. If corrosion centers remain on the metal, they will continue to develop under the layer of vibration insulation, which will lead to through holes. Therefore, before pasting problem areas it is better to treat the rust converter and cover with soil.
☑️ Checklist of preparations
For degreasing, it is perfect. antisilicone Specialized cleaners that do not leave films. The use of aggressive solvents such as acetone or 646 can damage paint or plastic elements, so they should be used with caution. After cleaning, the surface should be absolutely dry and matte, without greasy spots from the fingers.
| Tool. | Appointment | Importance |
|---|---|---|
| Industrial dryer | Heating material and metal | Critical. |
| roller | Air removal, pressing down | Critical. |
| Degreaser | Surface cleaning | Tall. |
| Scissors/knifes | Unlock the material | Medium |
Technology of installation on flat surfaces
The process of pasting the floor and roof is considered the easiest for beginners, since these surfaces are mostly flat. The material is pre-cut into pieces of a convenient size, after which it is warmed up with a hairdryer. Do not heat the material to a boiling state or the appearance of bubbles, it is enough to make it soft and plastic so that it easily stretches and repeats the relief.
Sticking begins at one of the edges, gradually smoothing the material with a roller from the center to the edges. The movements of the roller must be confident and strong to squeeze all the air out from under the layer of vibrodampfera. The remaining air bubbles are the points where the material doesn’t work and can detach over time. If you notice an air pocket, it can be gently punctured with a needle and rolled again.
Tip: For a better fit on complex reliefs, warm up not only the material, but also the metal of the body, this will improve adhesion and allow the material to better cover the irregularities.
When pasting the floor of the cabin, it is important not to glue the technological holes and seat mounting places, if they interfere with the installation. It is also worth leaving access to the gas tank hatch and places for wiring. In areas where heavy acoustics are planned, a double layer of vibration insulation can be used, but only if the body structure can withstand the additional weight.
Pay special attention to the joints of the sheets. They should be dense, without gaps, but also without a cover that will create extra thickness. After the work is completed, the surface should look monolithic. Don’t be afraid to use a pattern of paper or cardboard for difficult areas, it will save expensive material.
Sticking of doors and complex reliefs
Car doors are the most difficult element for noise insulation due to the presence of many technological holes, stiffness ribs and internal electronics. Here it is important not only to glue the material, but also not to disrupt the work of the mechanisms of windows and locks. Before starting work, remove the door map and carefully examine the internal structure of the door.
The first layer is always glued to the vibration insulation on the outer wall of the door (the one that looks outward), closing large technological holes. This turns the door into a closed volume, which improves the sound of the speakers and reduces external noise. The material should be carefully rolled around the holes for wires and rods to ensure tightness.
⚠️ Be extremely careful when working at the top of the door and near the windows – getting molten bitumen into moving mechanisms can put them out of order.
For interior surfaces, doors facing the cabin also use vibration insulation, but often in combination with a noise absorber. The complex terrain requires the use of small pieces of material that are heated and pressed into the recesses. You can’t be lazy here, as every untreated site will resonate.
After pasting, check the operation of all the door mechanisms several times. The pulls of locks and wires should not be clamped or limited in movement. If the material interferes with the movement of the mechanisms, it must be carefully cut or replaced with a thinner analogue at this place.
Nuances of work with wheel arches
Wheel arches and slats take the brunt of road noise and suspension vibration. Before pasting the arches from the outside, you need to remove the underwings (if any) and thoroughly wash the metal from dirt and anticor. In some cases, the old anticor will have to be removed completely to ensure contact of the vibrodampfer with the metal.
For arches, it is recommended to use materials with high moisture resistance and thick foil, since the operating conditions there are extreme. Vibration insulation is glued to both the inside of the arch (from the cabin) and the outside (under the under-wing). This creates a double barrier to noise.
Secrets of the professionals
For maximum efficiency, an additional layer of liquid noise insulation can be applied to the arches over the vibrodempter, but only if this is permitted by the material manufacturer.
When pasting arches from the cabin (in the trunk or under the carpet), it is important not to glue the ventilation holes, if they are provided by the design. The vibration of the spars and the trunk floor is extinguished by thick layers of material (4-5 mm). Here, too, surface cleanliness is critical, as dirt and moisture will quickly destroy adhesion.
Do not forget about plastic underwings - they can also be pasted on the inside with light vibration and noise insulation materials. This will reduce the noise from sand and rocks drumming on the plastic when moving.
Typical errors and quality control
One of the most common mistakes is to paste dirty or wet metal. The moisture left under the material will trigger a corrosion process that you will only notice when it is too late. Always use. hairdryer drying the surface before installation, even if the metal appears dry to the touch.
The second mistake is not enough slack. Many beginners simply iron the material with a hand or a soft roller, believing that the adhesive layer will stick itself. This is not the case: without strong mechanical pressure, the material will not fill all the micro-nervities of the metal and will not work efficiently. Use a hard roller and apply force.
The third mistake is the use of inappropriate materials. Do not put vibration insulation for the floor on the roof, as this will create an extra load on the racks and can lead to sagging ceiling or problems with the geometry of the body. Keep the weight balance of the car.
⚠️ Note: Do not use bitumen-based materials near sources of open fire or excessive heating (e.g. directly onto a muffler), as bitumen is combustible.
Quality control is carried out by tapping. Walk along the entire glued surface with knuckles of your fingers or a screwdriver handle. The sound should be deaf and short everywhere. If you hear a ringing, it means that in this place the material has unstuck or it simply does not exist.
The quality of vibration insulation is 90% dependent on surface preparation and rolling strength, not just on the price of the material.
Frequently Asked Questions (FAQ)
Do I need to remove the old factory anticor before gluing?
If the anticor is held firmly, not swelled and is a hard mastic, it can be degreased and glued over. If it is loose, peels off or it is just dirt - remove to metal.
Can I put the vibration insulation in the cold?
It's not recommended. The optimal temperature for installation is from +15 ° C to +25 ° C. In cold, the material loses its stickiness and the metal shrinks, which will lead to flaking when heated.
How much does the vibration insulation dry after installation?
Vibrodampers on a bitumen basis do not require time to "dry", they work immediately after cooling and pressing. However, the material is gaining full adhesion within 24 hours.
Do I need to close the vibroproofing from above?
The vibration insulation itself is not necessary to close, but a noise absorber (splen, accent) is often placed on top of it to achieve a complex effect of noise insulation.