Restoration of the underbody coating and wheel arches (VAZ-21011)

During vehicle operation, the anti-corrosion, anti-noise coating on the underbody is damaged and worn away by exposure to gravel, sand, salt, and moisture. The exposed metal is subject to corrosion.

At the automobile plant, BPM-1 mastic was applied to the lower surface of the body base and side members for noise insulation and protection against corrosion.

1. Before restoring the coating, place the car on a lift, carefully inspect the underbody and identify coating defects. Clean the underbody from dirt, remove rust with a spatula, sandpaper or rust converter according to the instructions. Blow the underbody with compressed air.

2. Place the car on a lift in the mastic application chamber and remove the wheels.

3. Cover the brake drums and discs with protective covers, insulate the driveshaft, muffler, cables and other areas that cannot be treated with mastic with thick paper and adhesive tape.

4. Degrease the areas stripped to bare metal with a rag soaked in white spirit. Apply GF-073 primer to the stripped areas with a spray or brush and leave for 5–10 minutes.

5. Apply BPM-1 mastic to defective areas using a spray or manually (brush and spatula) in a layer of 1–1.5 mm.

6. In cold weather, keep the mastic in a warm room before use until the temperature rises to at least 20°C.

7. Dilute the thickened mastic with xylene to 3%.

8. Clean paintwork contaminated with mastic with a rag soaked in white spirit.

9. Dry the mastic at a temperature of 100–110°C for 30 minutes or at 18–20°C for at least 24 hours.