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How To Use Bondo Auto Body Filler

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How to Use Bondo

Bondo is a repair product that is used as body filler for rusty or dented cars. It can be used on a variety of other items also. Bondo can be used on different surfaces such as wood, metal, and fiberglass to repair dents and cracks. This article will instruct you on how to use Bondo.

How To Use Bondo




  1. Clean the area where the Bondo will be applied. A clean surface will help create a solid patch on the surface.


  2. Place a small amount of Bondo in a paint pan. You should do a 2-inch section each time you apply the Bondo. It is better to work in small batches when using Bondo.


  3. Put a trip of hardener on top of the Bondo. Make sure you mix them together well to get the Bondo to harden.


  4. Use a putty knife to scoop the Bondo mixture. Apply the mixture to your surface. You will need to work fast because Bondo hardens quickly.


  5. Spread the Bondo mixture over the surface as evenly as possible. Fill in any edges to keep moisture from getting under the Bondo.


  6. Allow the Bondo to harden for about 45 minutes.


  7. Sand the surface with the Bondo with medium grit sandpaper. Sand the entire surface with Bondo to even out any ridges.


  8. Change the sandpaper to fine grit and finish sanding the surface until the surface is smooth.


  9. Wipe the area with a clean and damp towel. The area is now ready for painting.