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Nickel

02:39PM | 07/07/04
Member Since: 07/06/04
1 lifetime posts
Bvmisc


The front panel on the seat that surrounds our fireplace has fallen off. It is made of slate; about six inches wide; 8 feet long and perhaps a half inch thick. It is quite heavy; I'd guess 40 pounds or so.

The slate hangs vertically attached to wood with some type of adhesive. Looks like it has been repaired before since there is both white and black adhesive attached to the wood.

What type of adhesive would be best in this situation? Do I need to remove the old adhesive or just put the new adhesive in other spots along the back of the piece. I've got C-clamps to attach until it is dry.

Piffin

07:28AM | 07/11/04
Member Since: 11/06/02
1281 lifetime posts
You have a couple of challenges, which is why it has already failed twice.

There is the fact that the different materials (wood and stone) will expand and contract at differing rates with moisutre and thermal changes. This requires a somewhat fleable bnond agent.

Then there is the fact that slate has a bit of oil in it naturally. That oil can prevent mechanical and some chemical bonds.

There are thinset mixes made specifically for slate you might be able to find at a stone and tile center, but they are best used for all masonry connections rather than wood.

I think I would try a silicone caulk for a vacumn bond which holds by suction. Silicone is used for glass also.

Slate is easily broken so do not use a C-clamp. Use duct tape and props to hold it in place for a day or so.

Excellence is its own reward!


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