How long does body filler last on a car?

In most cases, Bondo filler lasts for two to three years. There are car owners who have had Bondo hold on to their vehicle’s bodies for even eight years. If you want it to last that long, then you need to apply it correctly and thoroughly follow the manufacturer’s instructions.

Can Bondo fill cracks?

You may be able to use some more Bondo putty to fill in the cracks but you’d still need new paint to make it look right. If you’re going to go to the trouble of painting then you might as well fix the problem properly. There may be a lot of rust hiding under all that Bondo.

How much body filler is too much?

Repairers should apply “no more than a quarter-inch max,” Miller said. This guidance didn’t mean each layer of filler could be a quarter-inch; rather, no part of the final product should exceed 0.25 inches of filler, according to Miller.

Does Bondo fall off?

Bondo will last a long time if used properly. It is used to finish off small imperfections in you body work. It will not work to fill holes thru panels.

Can I Bondo over rust?

To Bondo or Not to Bondo Minor surface rust can often be sanded and painted, but major rust pitting and holes may require a little more effort and material — specifically, Bondo or some other quality body filler. However, Bondo shouldn’t be used on every kind of rust hole.

Does body filler prevent rust?

The mere application of body filler over a substrate won’t stop rust, Miller said. Fillers might contain corrosion resistance and slow the process, “but they’re not gonna stop it,” he said. Put filler on rust, and “(the rust) may continue to grow,” he said.

What causes car paint to crack?

Paint cracking can be caused by another of factors, including poor flash time between coats, force drying of undercoats (or excessively thick ones), improper paint mixture, excessive hardener use, and exposure to extreme temperatures or moisture.

How thick is too thick body filler?

So in the spirit of political correctness and repeating the party line ” Ideally filler should never be more than 1/8″ thick “.

How deep can Bondo fill?

There is no minimum thickness for Bondo, but there is absolutely a maximum. You do not want to apply body filler to anything that is thicker than about a 1/4”. That does not mean it can’t be done, but the repair will not last as long. Eventually the filler will shrink and possibly crack, or even pop off!

How do you stop cracks from reappearing?

The secret to making sure that the crack doesn’t reappear is really just down to using jointing tape. This method works every time and it doesn’t matter if you’re plastering over it, using a filler like we did here or even if you’re installing plasterboards (where you have to tape the join to ensure it doesn’t crack).

Can you use body filler to repair scratches on a car?

This guide shows how you can use automotive body filler to fill in gaps, cracks, dents and even some large scratches. A 1998-2002 Honda Accord was used to make this guide, but the principles apply to any car or truck body. Clean the area around the spot you wish to repair with water and if necessary, soap.

What should I look for when buying car body filler?

First and foremost you need car body filler that is easy to use. That ease of use will be spread over several different areas however. So for example look for filler that is easy to mix. Secondly, some fillers are designed to change color when mixed.

How do you fix a dent in a car body filler?

Fill the dent, gap or crack with the body filler and hardener mix. You can use paper, tape or your hands to smooth out the filler while it is still in putty form. It is recommended that you apply several thinner layers of filler to deep dents and cracks to prevent having a porous finish.

Is car body filler similar to teeth filler?

Car body filler is somewhat similar to teeth filler. Note here we’re talking in terms of function, not in materials or formulas. Don’t use your car body filler for impromptu dentistry repairs!