Quick Answer: Is Bondo Body Filler Waterproof?

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..

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.

Does Bondo absorb water?

Well, the all metal fillers (under your bondo) don’t absorb water to the extent that regular bodyfiller will, but believe they still do absorb some. Plastic filler absorbs it like a sponge, but keeping some heat on it should eventually evaporate the water from the plastic filler.

Does body filler absorb water?

Another point to note is that the talc in body filler is hygroscopic, meaning it readily absorbs water. Don’t leave a vehicle in damp conditions with exposed body filler. Moisture could get absorbed and give you big problems later in the repair. Body filler is exothermic, meaning it creates its own heat when curing.

How long can you leave Bondo unpainted?

about 2-3 weeksBetween life and work, the longest time period the bondo would go Unpainted would be about 2-3 weeks. Click to see full answer. Also asked, how long before you can paint over Bondo? Bondo mixed to the color swatch will begin to cure in less than 10 minutes at room temperature.

How long does Bondo take to fully 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.

Can I wet sand body filler?

Don’t wet sand filler. Filler is too absorbant and you can have problems getting it dry plus you could cause moisture to wick through to the metal or weaken the bond between the filler and the substrate.

Can I apply body filler over primer?

Can you apply body filler or bondo over primer filler? Yes. … You CAN apply over sanded 2k primer, or bare metal. Be sure to have the area sanded with at least a 150 so the filler has some TOOTH to grab to.

Does Bondo need to be primed?

No priming or etching is needed as long as the metal is textured and not rusted. Will Bondo stick to sanded paint? Bondo Ultimate can be applied directly over sanded and cured primer and paint. This filler remains easy to sand for days after the application.

Is Bondo permanent?

Bondo Body Filler cures fast, shapes in minutes and is formulated to be a non-shrinking and permanently durable material. In addition to its uses on vehicle exteriors and other metal surfaces it is also a suitable repair option for wood, fiberglass and concrete.

Can I apply Bondo over Bondo?

Yes, you can layer bondo over bondo as much as necessary with no problem.

Is body filler the same as Bondo?

Bondo car body filler is a two part solution including a resin based filler and a hardener which are used to repair holes, dents, rusted areas and scratches from the exteriors.

Can you leave body filler exposed?

Don’t leave the body filler exposed if you’re driving the car. As you stated, shoot on some epoxy and apply the filler. After you’ve sanded, wipe it down and shoot some epoxy atop the body filler. That will allow you to leave it as is for a long time.