Filling some gaps in miters?

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Forum topic by Havasumatt posted 02-17-2012 08:48 PM 10063 views 0 times favorited 7 replies Add to Favorites Watch
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30 posts in 2351 days

02-17-2012 08:48 PM

Topic tags/keywords: question joining finishing miters gaps filling

Need some help on sloppiness! What’s the best way to fill the cracks on a not so perfect miter? I made a table top and put a 5” wide border around a not so perfect square… Couple of the miters have maybe a 1/16 gap at the corner and would just fill it with filler but was wondering if it would eventually crack after time? I’m goin to stain and poly but wouldn’t want the gaps to reappear over time. Any advice would be appreciated on what to use!

7 replies so far

View waho6o9's profile


8191 posts in 2575 days

#1 posted 02-17-2012 08:53 PM

Mix some saw dust of the same wood with some glue and fill the gap. Blends in better than filler I think.
Good luck.

View Mosquito's profile


9305 posts in 2291 days

#2 posted 02-17-2012 08:55 PM

When I had to do that for my first table project, I used the same method that waho6o9 stated. I used some sanding sawdust and some glue. I would suggest using more sawdust than you think you need, otherwise it just ends up looking like messy glue. Take that with a grain of salt though, as I am new to this as well

-- Mos - Twin Cities, MN - -

View Bill White's profile

Bill White

4930 posts in 3959 days

#3 posted 02-17-2012 08:55 PM

Did ya glue the joints? If not, use some wax fillers such as SoftWax by FastCap. I use this stuff for trim molding, etc.
You can fill after finishing if ya want. Rub it in, buff it off. You may have to reapply from time to time. It is just the nature of unstabile miters.
I often use biscuits to help this issue on new builds.
You didn’t state what type top you built. Expansion and contraction will often be an issue with miter joints.


View Fred Hargis's profile

Fred Hargis

4986 posts in 2492 days

#4 posted 02-17-2012 09:08 PM

If your going to stain, it becomes a little harder to conceal. Best to test your approach out first on some scrap. If you don’t stain, I’ve had good results mixing sawdust with the finish I planned to use.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Havasumatt's profile


30 posts in 2351 days

#5 posted 02-17-2012 09:33 PM

Thanks for the replies! Got bored with some 2×4 and 2×6 and trimmed the sides off. Layed em flat and glued and pocket screwed together with 2×6’s around as a boarder look. Sturdy and cheap but a pain to keep square and alot of sanding. I know it won’t be perfect, made one before but with end grain showing so no miter problems. Plus I got a craftsman scms so that don’t help! But I might try the saw dust fix, maybe even shove some thin shims in the gaps, might look better accepting stain.

View KenBee's profile


109 posts in 2634 days

#6 posted 02-19-2012 05:02 PM

Try the glue/sawdust suggestion then once it is dry burnish it using a screwdriver shaft or anything that is round and smooth.

-- If it won't fit get a BIGGER hammer.

View Straightbowed's profile


717 posts in 2297 days

#7 posted 02-19-2012 08:07 PM

if u would shoot the miters with a handplane u can make them perfect, ever tried that it works very well there is article in wood magazine about a jig for shootin the miter, but I always shoot mine anymore, and they fit perfect that has been a dream of mine to make perfect miters but the shootin board is the trick, I think I seen it on woodsmith or something but build a good shooting board and u will be happy with the results

-- Stevo, work in tha city woodshop in the country

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