Door soundproofing for Volkswagen Polo

You will need:

- silicone roller

- degreaser

– vibroplast (of your choice, depending on the purpose)

- splenitis, two types. (4 mm. and 8 mm.)

1. Remove the trim.

2. After removing the skin, degrease the surface and glue vibro in small pieces.

3. Glue splenitis 8 mm. over vibra.

Important: use as large an area as possible.

4. We close the hole in the door with a plug and glue another layer of splenium on top.

5. Now you need to try to make the pieces as large as possible, and then with a 4 mm splenitis. 
6. We do the same with the rest of the doors.

Source: http://www.drive2.ru/l/2090408/