Question: Will Bondo Hold Up To Heat?

Does Bondo crack over time

Bondo is very brittle and eventually cracks, even from simple road vibration over the years.

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Bondo is not meant to be more than a fraction of an inch thick, and as such it should flex some.

However, deep pockets of bondo, cannot flex as it should..

What can I use instead of Bondo

Re: Bondo substitute?? You can use plastic/metal 2-part epoxies. Repair epoxy is also a good alternative.

Do you have to sand between coats of Bondo

Several coats will likely be needed as you build up the patch. Between each coating, sand the hardened putty with 80-grit sandpaper to remove excess Bondo. The coarse sandpaper will also rough up the surface giving it the tooth needed for the subsequent coating of Bondo to achieve good intercoat adhesion.

How long can Bondo be left unpainted

about 2-3 weeksBetween life and work, the longest time period the bondo would go Unpainted would be about 2-3 weeks.

Do you have to prime over Bondo

You can even use something as fine as 80 grit, just be sure to push the filler into the scratches so that it bonds well. No priming or etching is needed as long as the metal is textured and not rusted. … Bondo Ultimate can be applied directly over sanded and cured primer and paint.

Will Bondo fall off

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 fall off.

Does rain hurt Bondo

the moisture will be trapped between the metal and the bondo. something about it yes the bondo will dry out but it traps just enough between the two to cause problems most likely way down the road. there is something about it that makes it harder for the moisure to escape than it was for it to get in.

How warm does it have to be to use Bondo

45-50 degreesBondo said: FREQUENTLY ASKED QUESTIONS (FAQ) What is the lowest temperature that body fillers can be used in? 45° – 50°F (7° – 10°C); if using below 65° F, the amount of hardener used should be slightly increased. 12/2/14 4:07 p.m. Bondo says 45-50 degrees.

Can Bondo be used in cold weather

I agree, you can bondo in cold weather. It will be easier if you keep the bondo warm (in your house) before you measure it out and use it. Keep the part you are going to bondo in the house also until just before you do the bondoing. The bondo will actually get warm on its own (exotherm) if it is not spead to thin.

Why is Bondo bad

Just be careful. Bondo will not stop rust so if it is used to cover an area without the proper prep work the panel will continue to rust from the inside out. Even if you watch the big shots on TV restoring a car, they will use a skim of body filler or putty over the entire car and block it all smooth.

How big of a hole can you fill with Bondo

Re: Just how big of a hole can Bondo cover? Bondo is only recomended to fill inperfections in the body, its only supposed to have a thickness of 1/6 up to 1/4 of and inch thick.

How long does Bondo take to dry without hardener

Bondo mixed to the color swatch will begin to cure in less than 10 minutes at room temperature. Too much hardener in a warm environment will reduce working time, but too little in a cool environment can result in maddeningly long curing times. A heat lamp can speed curing in colder weather.

What’s the difference between body filler and Bondo

Bondo is a company that makes Body filler, Fiberglass-reinforced body filler, among other items. Body filler is the stuff that can make any surface smooth with proper usage.

Is Bondo a good body filler

1. 3M Bondo 261 – Best Overall. Bondo is a well-known brand in manufacturing effective and quality car body fillers. This one is a breath of fresh air for vehicle owners and auto body professionals owing to its microsphere formula that helps in repairing easily and quickly, which makes it our best overall product.

How long does Bondo take to cure

If your filler hardens too fast, you used too much, if it takes too long, you didn’t use enough. You only want to mix what you can use in about 10 minutes. Properly mixed, body filler will begin to thicken in 10-15 minutes, and be fully cured in 30.

Are Bondo fumes dangerous

Applying Body Filler / Bondo It has a characteristic sweet smell at low concentrations and a sharp disagreeable odor at high concentrations. Exposure to styrene can cause respiratory irritation. … In some people, direct contact with the filler may cause skin rashes and repeated exposure may increase your sensitivity.

How do you slow down Bondo

You can slow up the cure time by using less hardener. Also, keep it cool–I sometimes put my container in ice water to slow it down a little. But, one of the benefits of using Bondo is that it does cure fast letting you get to sanding and finishing much faster than using most other products.

What will Bondo not stick to

Clean and sand or scuff the surface to prepare it for body filler — it will not adhere to smooth, dirty or oily surfaces. Generally, if paint will stick, so will Bondo. … Conversely, if there’s an area you don’t want Bondo to stick to, apply a release agent (see tools and materials) or use Scotch tape or wax paper.

Is it OK for Bondo to get wet

You can wet sand plastic body filler (“Bondo” is a trade name like “Chevrolet” or “Nike”) but you should carefully heat the filler with a blow torch before priming. … If the Bondo isn’t dry, it’s because you didn’t use enough hardener or the temperature is too low. Getting it wet didn’t help.

Is Bondo permanent

Bondo Body Filler cures fast, shapes in minutes and is formulated to be a non-shrinking and permanently durable material.