| What Is Fiberglass? | | | | apply a thin layer of fiberglass filler over any |
| Raw fiberglass come in a soft fabric like material. | | | | welding that is performed. Body filler absorbs |
| When saturated with liquid resin and harder, it | | | | moister, which will leads to corrosion and rust. By |
| becomes hard and very strong. There are not | | | | using the fiberglass, we eliminate the moister |
| too many fiberglass auto parts on modern day | | | | absorption problem. Since our main purpose is to |
| cars, as they have all started using other | | | | seal the welded area, the short hair fiberglass is |
| composites like SMC and Carbon Fiber. However, | | | | sufficient for the application. |
| fiberglass was on early model corvettes, truck | | | | What Can Fiberglass Filler Be Used On |
| hoods, and many other parts. There are still | | | | This filler can be used over bare metal or |
| aftermarket parts that are manufactured from | | | | fiberglass. |
| fiberglass and it still used for boats and jet skis. | | | | Finishing The Repair |
| The Difference Between Fiberglass and Fiberglass | | | | As I mentioned, fiberglass does not sand well. |
| Filler | | | | That is why I recommend only applying a small |
| Fiberglass filler comes in a can and is mixed with a | | | | amount to the welded areas and rough sanding it. |
| cream hardener. It mixes a lot like regular body | | | | After this is done, you can apply body filler on the |
| filler, but it is thicker and a little harder to mix. The | | | | top of the fiberglass filler and finish the repair as |
| filler actually has fiberglass mixed in it. It comes | | | | you normally would using body filler. |
| short hair and long hair. This is the length of the | | | | Warning |
| fiberglass that is mixed in the filler. Both provide | | | | You should always wear proper protective |
| excellent waterproof properties as they do not | | | | equipment when sanding any filler. However, |
| absorb water. Both fiberglass fillers are stronger | | | | extreme caution should be taken when sanding |
| than regular body filler. The long hair filler provides | | | | fiberglass products. It not only itches and irritate |
| the most strength out of the two. However, | | | | your skin, but it is extremely unhealthy to |
| these fillers are very difficult to sand. The filler is | | | | breathed the fiberglass. Be certain to wear an |
| also thick, which makes it hard to level and | | | | approved dust respiration, gloves, eye protection, |
| smooth like regular body filler. | | | | and you may even want to wear a disposable |
| Why Use Fiberglass Filler If It's So Difficult To | | | | paint suit. If some of the fiberglass does get on |
| Sand | | | | your skin, take a cold shower. This will help keep |
| The reason we use fiberglass filler in auto body | | | | your pores small and allow the fiberglass to wash |
| repair is not really the added strength, but for the | | | | off. |
| waterproof properties. It is recommended to | | | | |