Weldbond question

janmilJune 16, 2008

Hi --

Our mosaic group has been asked to assist in a project where 50 kids will make stepping stones (as many as possible) but they only have two 2 hour sessions to complete the work. The only way we can do this (and keep the cost low) is to glue glass on to preformed concrete stepping stones.

My Question -- will undiluted weldbond work for this exterior application? I have always used silicone adhesive for my own outdoor projects but the folks who are staging this project are concerned about fumes -- hence the weldbond option.

Anyone with experience in this? The bottle says that is can be used on concrete but I trust "real" experience more.

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No Weldbond..it re-hydrates. First bit of moisture things will be popping off everywhere. Thinset is your best bet. I can't remember, but I think a couple people have done successful projects with kids and thinset

    Bookmark   June 16, 2008 at 8:14PM
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You can buy a tub of thinset already to go...easy peasy! Kinda like peanut butter, just spread it on.

    Bookmark   June 17, 2008 at 1:48AM
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I had 9-10 yr olds working with thin set in pastry bags, they did great

    Bookmark   June 18, 2008 at 3:10PM
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We started making stepping stones this morning with just over 50 kids - always on preformed cement stones (this is at least our 8th year of stepping stones at art camp) with broken up tile (same thicknesses)

We use mapei pre-mixed tile adhesive that comes in a tub.

first we trace the stones on butcher paper on the tables, and the kids work out their designs there. Then the helpers get the adhesive on the stones and the kids transfer their pieces over. Then the next day we grout. We have learned to do the grouting outside!

The "transfer" is difficult for my class of 3rd graders, who take great care with their designs and are often disappointed that they don't remember where the piece goes - so today we glued butcher paper onto the designs with Elmers (I put the glue on the paper first) and we will transfer the whole mosaic this way, using a wet sponge to loosen the elmers & paper once the design is pressed into the adhesive.

Then the next day we'll grout. So, that's 3 days & 3hour sessions, but we do lots of other art projects at the same time!

I hope you will post pictures of your finished project!

    Bookmark   June 18, 2008 at 8:41PM
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