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Need a substance to use as grout

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Forum topic by Dave Witkus posted 11-22-2012 08:49 PM 852 views 0 times favorited 10 replies Add to Favorites Watch
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Dave Witkus

28 posts in 898 days


11-22-2012 08:49 PM

Topic tags/keywords: question

I have experimented with an old coffee table that I want to glue small Koa pieces to the the top of the table in a mosaic pattern. As you might know, most mosaic is done in tile and cement type grouts are used to fill the spaces between the small pieces that make up the design. But I’m using wood on wood and bathroom grout is not the desired material.

Is there a substance that can be spread out over the entire surface of the mosaic to fill all the spaces in between that does not shrink as badly as glue does. I also prefer it black so tintable epoxy was suggested but epoxy shrinks and is expensive. Any one know of something that will not shrink to use as grout?

aloha

dave

-- After you wipe away all the hype, who you really are is synonymous w how you treat people.


10 replies so far

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Clint Searl

1479 posts in 1113 days


#1 posted 11-22-2012 10:21 PM

There’s an epoxy grout made for tile that would work.

-- Clint Searl....Ya can no more do what ya don't know how than ya can git back from where ya ain't been

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patron

13182 posts in 2093 days


#2 posted 11-22-2012 10:34 PM

bondo with back ink or paint
don’t use as much hardener
so you have time to smooth it out
in the joints
after mixing

it sands well

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

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alan coon

113 posts in 2465 days


#3 posted 11-22-2012 10:56 PM

patron is dead on.

-- Al, South E. Az., But it's a dry heat.

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Dave Witkus

28 posts in 898 days


#4 posted 11-22-2012 11:09 PM

Never thought of bondo….this site is amazing…..thank patron.

-- After you wipe away all the hype, who you really are is synonymous w how you treat people.

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patron

13182 posts in 2093 days


#5 posted 11-22-2012 11:10 PM

another thing

seal the wood
with some spray pr brushed on poly or lacq
before the ‘grout’
so the wood doesn’t leach the black
it will sand off with the bondo later

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

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blackcherry

3209 posts in 2575 days


#6 posted 11-23-2012 12:06 AM

Well done patron on your suggestion…Happy Thanksgiving my friend…BC

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Wdwerker

333 posts in 986 days


#7 posted 11-23-2012 12:16 AM

I would glue my mosaic pattern in place first and just spray a little finish on the tops then spread the tinted bondo to fill in the gaps. Do a little test run with the tinting and a few scraps so you know how it will behave.

-- Fine Custom Woodwork since 1978

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Clint Searl

1479 posts in 1113 days


#8 posted 11-23-2012 12:41 AM

Do it right

http://www.epoxy.com/
http://www.laticrete.com/architects/products/grouts/epoxy_grouts.aspx
http://www.custombuildingproducts.com/products/grout-materials/epoxy-grout.aspx

-- Clint Searl....Ya can no more do what ya don't know how than ya can git back from where ya ain't been

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Promod1385

19 posts in 826 days


#9 posted 11-30-2012 11:59 PM

You can use mastic (its a pre mixed tile glue) or you can spread PL in a pinch (i like the PL premium variety most for this task) be advised you wont get much build with it as it goes on very thin. Regular PL can go on thicker and create more build.

I am a fourth generation tile setter and would recommend epoxy grout as well. Its not a very forgiving material, you will want to do smaller areas than you would with traditional grout, work fast and do not allow any of the grout to dry on the material or it will be there forever! They sell a small Kobalt brand margin style float at Lowes. Its a good little gum rubber float that would be suited well for this task.

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runswithscissors

1242 posts in 777 days


#10 posted 12-02-2012 06:12 AM

Epoxy shrink? It’s not supposed to. It does run like honey (think about when you were a kid, had a piece of toast with a hole in the middle, and you put honey on it; It’s that bad). One way is to thicken it. I use wood flour (sanding dust), then tint it with powdered graphite. WEST system epoxy co. puts out powdered graphite in a pint or qt. sized can. Barely weighs anything. A small amount will blacken a lot of epoxy. And when it’s cured, there’s no graphite rubbing off on your wife’s doily. I’d put it in the grooves with a glue syringe.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

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