Quick Answer: How Strong Is Bondo Wood Filler?

It is exceptionally strong — you can use Bondo® Wood Filler to rebuild rotted or missing pieces of wood for larger non-structural repairs. The filler cures fast and can be easily sanded by hand or power tools in only 15 minutes.



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What is the strongest wood filler?

Best Overall: DAP Plastic Wood All Purpose Wood Filler Coming in as our number one pick is DAP Plastic Wood. This all-purpose, solvent-based wood filler is formulated with real wood fibers. It looks and acts like actual wood, except once it hardens, it’s three times as strong.

Is Bondo as strong as wood?

Bondo dries super hard and doesn’t sand quite as easily as wood filler. Removing any excess Bondo BEFORE it’s 100% dry will really cut down on your sanding efforts. Here I’m skimming and shaping down the excess Bondo with my putty knife.

Will Bondo hold wood together?

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.

How long does Bondo last on wood?

10 years on they are fine.

Are wood fillers strong?

Usually available in small cans, pre-mixed wood fillers don’t have much structural strength. They won’t hold a screw or a nail and will crack or sink if you use them to patch a hole larger than 1/2 inch in diameter.

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Is Bondo wood filler water proof?

The two-part wood filler cures quickly, making it easy to spread while adhering it to the surface you are repairing. For more advanced repairs, Bondo® Wood Filler can be applied in layers to rebuild rotted or missing pieces of wood. As a result, Bondo® Wood Filler is water resistant and will not shrink.

Can you screw into Bondo wood filler?

Yes, you can screw into Bondo wood filler. It’s a decent wood filler for appearances sake; you can paint over it, sand it, and it can even take on stain.

How strong is Bondo?

“bondo” is polyester “fiberglass” resin with afiller, usually clay mixed in. It’s probably a little bit stronger than an adobe brick, (without any straw in it). If you used a filled Epoxy instead it would be stronger, about two times stronger.

How long does Bondo wood filler take to dry?

You could use the bag to squeeze it out, but I think using a putty knife is faster and easier. You have to work fast with Bondo because it hardens in less than 5 minutes.

Will Bondo stop wood rot?

Wood rot is a common issue for most homeowners, regardless of where you live. Fortunately, it can be easily repaired with the right products. Bondo® Rotted Wood Restorer will solidify soft and spongy wood by penetrating into the wood surface to create a solid base and stop rot quickly.

Do you have to prime over Bondo?

Bondo over time absorbs water causing rust to form underneath. It can also shrink over time causing paint to bubble or peel off. If used.. the metal must be primed first.

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Is Bondo wood filler an epoxy?

Bondo is an epoxy with fillers so, in a way, you’re both right. I’d suggest using Famowood wood filler as an alternative. Bondo and most body fillers are made of polyester resins. Not the same as epoxy.