If so, you probably know what to do in such a situation. If not, then…
Why doesn't fiberglass putty always work in car repairs?
Car bodywork repairs are most often carried out using specialist fillers. One of them is glass fibre filler. This is a great mixture that maintains exceptional durability and allows for the repair of even seriously damaged bodywork elements. Specialists dealing with bodywork element repairs use various types of fillers – not only those with glass fibre, but also filling, finishing, multi-functional fillers and many others.
- What properties does fiberglass car putty have?
- How to properly apply fiberglass putty to damaged car bodywork;
- In what situations is it worth choosing a fiberglass putty;
- What mistakes should be avoided when repairing sheet metal parts using fiberglass putty?
- When is fiberglass putty not the best choice?
- How to properly apply fiberglass putty?
Glass fiber putty - properties and application
In practice, bodywork repair is most effective when you use fiberglass putty. This is an innovative mixture that maintains exceptional durability, flexibility and resistance to mechanical damage at the same time. So what makes fiberglass putty stand out? The distinguishing features of this material for car puttying are:
- excellent adhesion to metal, aluminum and plastics;
- high resistance to corrosion and moisture;
- can be easily sanded, which makes it easier to smooth out repaired sheet metal parts;
- exceptional strength and flexibility;
- resistance to vibrations and shocks.
Of all types of car putty, the one with added fiberglass is an innovative choice. With this material, you can repair even the most damaged car body parts.
Although filling the bodywork with fiberglass material is more difficult than using universal filler, it is worth choosing this material. Thanks to this, the repaired bodywork elements are durable and maintain an aesthetic appearance for many years.
Advantages of fiberglass putty – when is it worth choosing?
It is worth deciding to use fiberglass with putty for bodywork repairs, especially when the maximum durability of the repaired sheet metal and plastic elements counts. In practice, you can use fiberglass putty for:
- repair of damage to the car body – both small and large;
- reinforcement of plastic and aluminum vehicle components that are exposed to vibrations;
- gluing elements that were previously made of fiberglass - there is no better solution for repairing elements made of such material than using fiberglass putty.
Interestingly, car body repair is not the only application of fiberglass putty. It is a mixture that works well when repairing parts of boats, motorcycles, and even agricultural vehicles.
Alternatives to fiberglass putty – discover other types of putty!
Body repair with the so-called glass fiber filler is a popular solution that is worth using in a situation where it is not possible to order a completely new element for car repair. Specialists also use other types of car fillers that allow for aesthetic and durable body repair.
Popular types of putty include:
- Polyester putty – flexible and easy to work with. Ideal for small dents and scratches.
- Aluminum putty – resistant to high temperatures. Suitable for repairs of elements exposed to heat.
- Spray putty – creates a smooth surface. Good for masking minor scratches and imperfections.
- Putty with added steel – very durable. Works well in structural repairs.
- Acrylic putty – easy to apply. Suitable for finishing work and minor corrections.
Before you decide on a specific type of putty, it is essential to determine what type of repair you want to perform. If the bodywork damage is superficial, you can use classic car putty – then there is no need to use a fiberglass additive.
In the case of more serious damage to plastic or aluminum elements, fiberglass putty will be the best choice, if only because of the durability of the material.
Common Mistakes When Using Fiberglass Putty – What You Need to Know
Before you start repairing your car body with fiberglass filler or any other material, make sure paint thickness gauge, whether individual sheet metal elements have not already been repaired with putty.
When the sensor indicates a layer that is too thick, it is necessary to completely remove the previously applied filler before starting the repair. Otherwise, the new coating will not permanently adhere to the surface of the repaired sheet metal and plastic elements.
One of the most common mistakes is applying too thick a layer of putty, which leads to cracking and poor adhesion.
Another problem is improper surface preparation – dirt, rust or grease weaken adhesion. Also, watch out for incorrectly selected proportions when mixing the hardener, because too much can cause rapid hardening and difficulties in processing.
When is fiberglass putty not the best choice?
If you are going to repair the bodywork, you need to know that fiberglass putty is not always the best option. This mixture is not suitable if:
- the surface of the repaired sheet metal parts is too thin and may crack under stress;
- you are only repairing superficial scratches – then the fiberglass putty is an unnecessary burden;
- you want to get a perfectly smooth body surface – fiberglass is difficult to sand.
In practice, fiberglass is useful for more difficult bodywork repairs, such as excessive damage caused by mechanical damage. If the repairs are only superficial, then a universal putty or aluminum putty will work well.
Remember! If you want to take care of your car's bodywork, e.g. after bodywork repairs, try to use high-quality car shampoo without wax and preparation for removing insects. This will remove dirt without excessive friction and keep the bodywork clean – otherwise, you will cause micro scratches that will negatively affect the aesthetics of your car.
How to properly apply fiberglass putty?
Working with fiberglass putty is not complicated, although it does require some practical skills. If you have never done this type of work before, it is better to leave your car's bodywork in the hands of professionals. If you intend to use fiberglass with putty:
- Remove old paintwork and remnants of old putty from the bodywork elements being repaired.
- Clean the element from rust, dirt and sand it with sandpaper to obtain maximum adhesion. Finally, degrease the element.
- Mix the hardener with the fiberglass putty. Remember the proportions recommended by the material manufacturer.
- Apply the putty using specialist tools, such as a spatula.
- After each coat, wait at least an hour for it to dry completely.
Finally, all that is left for you to do is sand until you get a perfectly smooth surface of the repaired element. Remember not to apply too thick a layer at once - it is better to repair the bodywork in thin layers. Then you will maintain the ideal durability of the repaired element.
After sanding, you only need to degrease the element, paint it with a primer, a colored base, and finally protect the whole thing with a clear varnish.
