3M Bondo Wood Filler – 30 fl oz, High-Performance Two-Part Formula for Interior and Exterior Wood Repairs, Fast-Curing, Paintable, Stainable

This stuff is great!! I've used other 'water-based' wood fill products. This is far superior. There is mixing required (base with hardener) Don't mix too much at once, as it will set up in a few minutes. But it is easy to use, is sandable in 20 minutes. There is some odor; use outdoors or in well ventilated area. Paints well. Generous size can with hardener. Recommend

This filler is a little tricky to use. You have to work relatively fast as it tends to harden rather quickly. I tried different amounts of hardener to try to lengthen the set up time but didn't seem to help. So only mix small amounts at one time. The odor is very strong so work with it in a well ventilated area...can give you a headache! It sets up very hard, easy to sand and prep for painting, etc. It basically worked very well for my project...filling a very large gap between a wall and a door casing.

Works Good and easy to use, however I found a cheaper filler that works just as good

This stuff works great to fill rotted hole anything wood. I used it on my wooden balcony railing and posts that rotted out. Cleaned out the rotten wood and filled it with this and it is stronger than ever. Hardens quickly so you have to mix it with the hardener in small batches and apply and then mix more to finish. Sandable and paintable! Heck of a lot cheaper and easier than replacing the entire rail!

Bondo wood filler is my "go to" solution for repairing wood rot.

I was doubtful about this but a new door/window unit was going to be over $4k. The bottom of the door frame was completely rotten. Luckily it was only outside damage. I was able to clean it up, remove rotted wood, treat with rot arrester and apply the wood filler. I think it looks great. I had to do 3 applications. It is sandable in about 20 min. Only mix what you can use in about 5 min. After that it’s like spreading oatmeal. I guess you could use a little less hardener if you need longer. I needed it to harden quickly since I was filling a large space. I used a Bondo blade to spread it.

Love this stuff! It is not a difficult to sand smooth as the original Bondo for cars, but don't let it fool you. It still delivers the strength needed for all your wood projects. It allows the same working time, which is minimal. I have learned that small batches have a greater working time than larger batches. Or possibly the smaller batches don't take me as long to apply to my project, creating an illusion of time management. Ready to sand in 30 minutes unless you fill a hole with the Bondo, which will require longer drying time. It is weatherproof once cured. Once painted, you cannot see the filler outline if sanded correctly. If you can feel it before you paint it then you will see the outline afterwards.

Bondo Wood Filler knowingly shipped severely DAMAGED. How do I know it was shipped damaged? Well, the shipping box did not arrive damaged and the other containers in the box were perfectly fine.