Wood filler

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Forum topic by MrRon posted 05-20-2015 08:14 PM 979 views 0 times favorited 8 replies Add to Favorites Watch
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4764 posts in 3238 days

05-20-2015 08:14 PM

I went to buy some wood filler the other day and was shocked at the price of the stuff; so I decided to try and make my own using fine sawdust and glue. Do you have a ratio for the amount of glue/sawdust to use? This is to fill small cracks and gouges in soft wood. I would have tried Bondo, but the can I have is very old and the hardener is probably no good.

8 replies so far

View Gene Howe's profile

Gene Howe

10479 posts in 3423 days

#1 posted 05-20-2015 08:25 PM

I have piled up a smidge of dust and added a drop or so of glue and quickly mixed it and forced it into the crack. Now, I just squeeze a little into the crack, add some saw dust and push it in with my finger.
I use TBII and have tried to mix a tsp of dust and glue it then apply it. It dries too fast and I end up having to make more.
I’ve done the same thing with CA and saw dust. Both work ok.
As to the Bondo hardener: I’ve had a previously opened tube last for years and still work.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View Drew's profile


350 posts in 3095 days

#2 posted 05-20-2015 10:07 PM

Latex Famowood is the best wood filler on the market. IMO.
For larger stuff epoxy is the best bet. You can mix in some very fine saw dust so it doesn’t look like epoxy but you lose most of the strength.

Trans tint works great in epoxy as well.

Glue and saw dust looks like garbage. I would avoid that.


View pintodeluxe's profile


5654 posts in 2808 days

#3 posted 05-20-2015 11:02 PM

The ratio is a pinch of sawdust to a squirt of glue.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View MrUnix's profile


6703 posts in 2194 days

#4 posted 05-20-2015 11:08 PM

I would have tried Bondo, but the can I have is very old and the hardener is probably no good.

Pretty easy to find out… just mix up a small blob and see if it hardens ;)

I’ve used glue/sawdust on several occasions when trying to get a close match… just use the sawdust from the same piece as the filler. I just keep adding until it feels ‘right’. For other projects, I’ve used epoxy, with and without fillers/colors. Bondo gets used for stuff that will be hidden or painted over.


-- Brad in FL - In Dog I trust... everything else is questionable

View ralbuck's profile


4473 posts in 2261 days

#5 posted 05-20-2015 11:38 PM

I agree with the tricks used above and I have used all of them sometime in the last 60 years of sawdust manufacturing.

-- Wood rescue is good for the environment and me! just rjR

View Yonak's profile


986 posts in 1516 days

#6 posted 05-21-2015 02:14 AM

I find the Bondo wood filler has a pretty good color, if mixed appropriately, for maple and ash. Add a little more hardener for pinker woods or it can be tinted using dry pigment.

View pjones46's profile


1001 posts in 2638 days

#7 posted 05-21-2015 03:18 AM

You can also uses powdered or premixed spackle mixed with fine wood particles which you can get from your ROS if you have a bag attachment.

If you have to rely on sawdust, then use one of the small coffee grinder to break the sawdust down into a fine powder like you get for the ROS dust bag.

Spackle is a very fine grain product and when mixed with powdered wood fibers will work better than glue in many ways, most important is that the dried product can be easily sanded and takes stain well.

Another alternative is Timbermate which comes in many color as well as can be mixed togeather to create other shades or can be tinted, sanded when dry, and also takes stain.

-- Respectfully, Paul

View BurlyBob's profile


5491 posts in 2260 days

#8 posted 05-21-2015 03:21 AM

agree with Gene and Brad. Have used a card scraper go get enough material to make a good glob. Be very careful, this method is very scientific and technical.

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