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What is the best mastic for the bottom of the car - recommendations for choosing

January 22, 2020

There can be several reasons for the need to finish the bottom of the car, and the main ones are as follows:

  • you are disturbed by noise, which is created when driving due to blows to the bottom of the car sand and gravel;
  • you want to prevent corrosion.

Constant scratching of the bottom will sooner or later lead to the development of corrosion in a certain area, so the insulation of this surface of the car is a necessity. Occurrence of scratches on the bottom, which is caused by the impact of abrasives, promotes the penetration of moisture there. Its adverse effects will be noticeable in a few months.

Rubber-bitumen anticorrosive mastic of the Bikar brand

That this did not happen, the bottom of the machine must be further processed, which you can do yourself. The main requirements for the insulation material should be its high level of adhesion to the surface, durability, lack of interaction with water, resistance to mechanical and chemical influences.

Mastic meets these criteria, which due to its cheapness and decent quality has gained popularity among Russian drivers. It penetrates deep into the microcracks of the car surface, preventing the ingress of moisture and exposure to road abrasives.

Varieties of material

Rubber-based automotive mastic

To finish the bottom of the car is allocated 3 varieties of mastic:

  • bitumen with rubber;
  • bitumen with polymers;
  • epoxy.

Experts decided to determine the quality of finishing and protection of the bottom of the car with each of these tools. To do this, they conducted a test involving a sandblasting machine, which operates under high pressure (9 atmospheres). Calculated, that the minute of exposure is equivalent to them 20 thousands of kilometers.

As a result of the test, the mastic with the addition of rubber began to break down after the 4th minute, and through 8 there are no minutes left. So, this variety will withstand up to 80 thousands of km of mileage under ideal conditions of a road covering and accurate operation.

Polymer mastic began to break down after 2 minutes of operation of the device, and completely disappeared from the surface 5 minutes, which is equivalent 40 thousands of kilometers. This result in 2 times worse. However, you need to consider, that such a mixture is more elastic at temperature differences.

How to learn the loosening of the wheels
Finishing of wheel arches and the bottom of the vehicle with mastic

According to test results, epoxy mixture proved to be the best when sandblasting. It began to crumble through 7 minutes (which is equivalent 140 thousands of kilometers), and completely disappeared from the surface 15. However, choosing it, should be considered, that when the temperature drops to low, it may peel off or crack, as epoxy resins are not elastic enough.

Manufacturers

If you don't know, which manufacturer in the market mastic for car flooring is better, pay attention to the following products:

  • The manufacturer's range also includes primers, priming, solvents for cars;
  • Anacrol 4001. It is two-component (includes base and hardener). Used to isolate and correct defects;
  • Fillinn FL The mixture is presented in aerosol format, which can handle hard-to-reach places of the car body. The tool stops the initial stage of corrosion and prevents its development, displacing water from the microcracks of the bottom;
  • The products are designed to protect the bottom of the machine from corrosion. The material creates a reliable and durable vibrating, hydro - and thermal insulation.

Car mastic of production "Anachlor"

Application technology

If you don't know, how best to handle the bottom of the machine at home, follow this algorithm:

  • wash the bottom of the car from dirt, remove the anti-corrosion coating, if it was;
  • drive the car to the manhole for that, to dismantle its wheels. Cover the brake system components with plastic wrap;
  • sand the rust spots with a brush or sandpaper. If needed, apply a corrosion converter to form a protective film instead of rusty stains;
  • once again make sure the bottom is clean and dry;