Quick Answer: How thick can you apply bondo?

What is the maximum thickness of body filler?

Apply a thin layer using firm pressure to ensure maximum adhesion being sure to “wet out” the surface completely. Apply additional filler in layers, building up the damaged area higher than the surrounding surface. Maximum filler thickness should not exceed 1/4 inch.

Can you layer Bondo?

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

How thick can you apply wood filler?

Trowel it into almost any hole up to about 3/8-inch. The mixture: Matches wood when the same species of sawdust is used. Shrinks.

What will Bondo not stick to?

6. 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.

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Will body fillers crack?

You do not want to apply body filler to anything that is thicker than about a 1/4”. Eventually the filler will shrink and possibly crack or even fall off. The general rule of thumb is that if the dent it deeper than 1/8”, you need to do metal work first.

Does Bondo crack over time?

Bondo is very brittle and eventually cracks, even from simple road vibration over the years. It really depends on how well the supporting screen mesh is applied and how well the surrounding surface is prepared ahead of time, along with what thickness of Bondo is applied.

Do you have to sand between coats of Bondo?

Cut and sand

Once the Bondo cures, it’s time to sand. The lightweight Bondo Gold is far easier to sand than the heavier type, so consider using the good stuff on the way out. Use a tack cloth to remove any dust between coats.

How long should Bondo dry before sanding?

Generally, in a matter if a few minutes it will start to harden and get rubbery. At that point, you can carve it up with a utility knife, a hand planer or a bondo rasp. Just make sure you leave enough to do a final sanding, usually within 10 to 15 minutes you can start sanding it.

How long can Bondo be left unpainted?

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

Whats the difference between wood putty and wood filler?

Wood filler differs from wood putty in that the filler usually consists of sawdust or wood fibers suspended in a binder, while putty is usually a plastic such as epoxy, fiberglass or polyurethane. Moreover, unlike filler, putty doesn’t harden. Wood filler isn’t weatherproof and won’t last outdoors.

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What is the difference between Bondo and Bondo wood filler?

The biggest advantage of using Bondo over a regular wood filler is the short dry time. Wood filler can take hours to dry and require more than one coat. Bondo dries in less than 30 minutes and only requires one coat! This means more projects in less time.

Is Bondo waterproof?

Bondo Fiberglass Resins and Repair Kits are 100 percent waterproof. Because they do not shrink, they are excellent sealers. Bondo Fiberglass Resin is sandable in less than 2 hours, is compatible with all paints, and creates a strong and long-lasting bond.

What will Bondo stick to?

Bondo or car body filler, will stick to almost anything as long as the surface is keyed and primed, so you have to seal the base layer first.

Is Bondo all purpose putty waterproof?

Unlike slower drying water- or solvent-based fillers that cure by evaporation, Bondo® AllPurpose Putty chemically cross links to cure for a faster, more durable repair. As a result, Bondo® AllPurpose Putty is water resistant and will not shrink.

Does Bondo adhere to wood?

To fill wood, you need a product that is specifically designed to bend and flex the way wood does. Just like caulk is too flexible to effectively fill large gaps in wood, Bondo is too stiff to do the same. When Bondo (or any auto body filler) is used to patch wood, it fails in a very short time.

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