Skip to Primary Navigation Skip to Site Navigation Skip to Main Content
How to do a Rust Repair using Bondo-Hair Fiberglass Reinforced Filler

Double-click to enlarge the video

How to do a Rust Repair


Many cars develop small patches of rust that eat away at the paint and become unattractive. These small patches of rust can be repaired. Bondo Hair fixes up to a 1" hole without welding.
Bondo Bondo-Hair
Bondo® Bondo-Hair® Long Strand Fiberglass Reinforced Filler

  1. Use a power drill to get down to bare metal with a 3M™ Scotch-Brite™ Regalite™ Drill Mounted Automotive Grinding/Sanding/Finishing System. Note: For larger areas, use a 3M Light Rust and Paint Remover. No assembly required.
  2. Mix Bondo Hair with Red Cream Hardener or Body Filler Hardener. Carefully "knead" to eliminate air pockets.
  3. Use 1 1/2" inches of hardener, knead carefully and spread Bondo Hair on area of rest
  4. Acetone will remove Bondo Hair from unwanted areas; follow acetone manufacturer's instructions.
Related Products & Projects

3M Scotch-Brite Regalite - Drill mounted discs grind through paint, primer, filler and rust3M Light Rust and Paint Remover - Removes rust, scale and old paint from metal

Find a 3M car care product
Find a Retailer for 3M car care products
Enter your zip code to find a 3M automotive care products retailer near you.
Find a 3M automotive care products retailer near you.
Locate a store near you.
or Shop 3M on-line
Find a 3M automotive care products retailer near you.