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Wood mosaic grout help......

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Forum topic by carolinagene posted 09-20-2021 08:46 PM 233 views 0 times favorited 7 replies Add to Favorites Watch
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carolinagene

16 posts in 1663 days


09-20-2021 08:46 PM

I plan to try and make a wood mosaic similar to what Robin Tucker has done on here. What is the best grout to use for filling in the spaces in between the individual pieces of wood? Thanks!


7 replies so far

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MrUnix

8775 posts in 3446 days


#1 posted 09-20-2021 09:07 PM

I don’t believe any ‘grout’ is used. If you watch the following video, you can see him assembling one using hot melt glue to adhere the pieces to a backer board:

Handmade Portraits: Wood Mosaics

Cheers,
Brad

PS: Check out his foot powered table saw :)

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

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carolinagene

16 posts in 1663 days


#2 posted 09-21-2021 01:02 PM

Brad…..in an earlier post he mentioned that he used powdered resin (like Dap), which is hard to find around here. Wonder if Minwax wood filler or regular tile grout would work?

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splintergroup

5877 posts in 2469 days


#3 posted 09-21-2021 05:02 PM

Regular (cement based) grout is not a good choice as the slight wood movement from moisture changes will eventually turn it into dust.

Used to fill wood pores, there are fillers that can be applied or you could flood the surface with a hardening oil (danish oil or even poly), then sand the heck out of the surface. The oil/sawdust will fill the joints and then harden up.

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shipwright

8751 posts in 4045 days


#4 posted 09-21-2021 06:41 PM

What he is doing is basically parquetry with very thick veneer. It would work very well with hot hide glue and the standard mastic made of HHG and sanding dust would be a perfect filler. The fast tack of HHG would make assembly a snap and likely tighter than hot melt glue and the mastic will dry hard enough to sand.

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese! http://thecanadianschooloffrenchmarquetry.com/

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MrUnix

8775 posts in 3446 days


#5 posted 09-21-2021 07:30 PM

Brad…..in an earlier post he mentioned that he used powdered resin (like Dap), which is hard to find around here. Wonder if Minwax wood filler or regular tile grout would work?
- carolinagene

Ok, went back and looked at some of his blogs. The one for a lazy susan describes the process he uses in pretty good detail. The pieces are hot glued on the backer, and once complete, he uses a mix of sawdust and glue to spread on and fill in any gaps present. After that, it’s all sanded smooth and a finish is applied. He was asked what glue he used in the comments, and he said it was simply ‘powered resin’ from National Casein – so it’s a Casein based glue which comes in power form and mixed with water.

Cheers,
Brad

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

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carolinagene

16 posts in 1663 days


#6 posted 09-21-2021 08:15 PM

Brad…..I need to find a US supplier. I wanted to use Dap powdered resin glue, but it is no longer made per Dap…..

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MrUnix

8775 posts in 3446 days


#7 posted 09-21-2021 09:07 PM

His blog indicates that he previously used regular white glue prior to switching to the casein glue. Something about humidity causing it to act up. Titebond II and similar are water resistant, so could probably be used just as well.

Cheers,
Brad

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

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