Most car bumpers are made from fiberglass, which is a durable material, until the car accidentally bumps against a collision. A bend or crack can ruin the look of any car. Fixing a fiberglass car bumper is easy and requires little car skills. Here is a look on how you can repair a cracked fiberglass bumper yourself:
Things you will need
- Fiberglass resin
- Fiberglass cloth
- Mineral spirits
- Remove the car bumper.
- If the crack is small, simply apply a layer of Bondo over it to repair it. If the crack is larger, follow the next steps.
- Clean the crack with mineral spirits.
- Mix the Bondo and apply it to the crack and around the outer area.
- Allow the Bondo to dry, and then sand it with the sandpaper. Use rough 60 grit first, and then move up to a 400 grit.
- Apply a fiberglass weave to the crack if it is larger than 1/16 of an inch.
- Grind the surface a few inches to both sides of the crack.
- Mix the fiberglass resin and apply it the crack on the backside of the bumper with a brush.
- Place a the fiberglass cloth on the resin, and ensure there is enough coverage to give proper support to the crack.
- Brush some fiberglass resin on the fiberglass mat.
- Let the fiberglass dry and sand the repair down until it is leveled.
- Use the Bondo to fill any imperfections that are visible. Sand with a 60-girt and go up till 100 grit to paint it.