Question about wood filler

[mrpep]

Im in the middle of a building a birch box and although my cuts are pretty even I can still see a seam. I plan on painting so would like to fill seams with wood filler. Is wood filler ok?

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[Massive spl]

Just use wood glue and if you have to silicone to seal any air leaks

 

[hispls 5,000+ posts]

Wood filler is pretty much only good for filling screw holes. Use caulking or construction adhesive to fill seems.

 

[mrpep]

Just use wood glue and if you have to silicone to seal any air leaks

It's more of a cosmetic issue , the glue held well but shrank a bit after it dried so the seams are a bit visible. Since I want to paint I want to have a smooth seamless finish if possible. My concern is will the filler will crack with age and / or vibration.

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[The_Dealer]

I use bondo body filler. It works great, and it's easy to work with.











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[mrpep]

Nice !! Well I used wood filler like if it were bondo, lol

Hope it doesn't bite me in the *** , I plan on sanding smoothly and then painting and then a couple of layers of polyurethane - hope this works out for me.

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[Umphism]

My only worry would be it cracking from all the vibration. if you do some coats of polyurethane that should seal it up and you should be good brother

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---------- Post added at 01:55 PM ---------- Previous post was at 01:54 PM ----------

 

Looks good any bracing

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[mrpep]

My only worry would be it cracking from all the vibration. if you do some coats of polyurethane that should seal it up and you should be good brother
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---------- Post added at 01:55 PM ---------- Previous post was at 01:54 PM ----------

 

Looks good any bracing

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Yes, tonight I add a brace in between the sub holes - I'll upload a pic and yes I'm a bit concerned with cracking too - but like you I also feel like the paint, and poly coats might or hopefully will keep things in tact.

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[Umphism]

I think your good to go. I just paint my box with truck bed liner. Came out alright

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[mrpep]

I think your good to go. I just paint my box with truck bed liner. Came out alright
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Upload a pic , It'd be nice to see it [emoji4]

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[mrpep]

Sanded the wood filler , a hand sander seems so work best since there is more control. Not too bad , seemed to have filled a few low spots.

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[mlstrass 5,000+ posts]

lightweight bodyfiller is what I use....