Glue

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FWLR
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Glue

Post by FWLR » Mon May 13, 2019 11:09 am

Can any member help with a question I have on glue.

I want to use Gorilla Glue for glueing some slate together. It is going to be flat glue and some smaller lumps also. I would like to know if it is okay to use outside and will it hold up and onto the slate.

It is the outside wood glue I have, it's supposed to be water resistant. The other reason I want to use that product is, I have 2 large bottles of it and money being tight at the moment, I know the stuff you can use for bathrooms and the like would probably better, but it's the money question.....
Rod

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https://gardenrails.org/forum/viewtopic ... 41&t=11364

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philipy
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Re: Glue

Post by philipy » Mon May 13, 2019 12:19 pm

There are several different Gorilla Glue's. Can't say I've come across their wood glue so can't help directly, although slate being non-porous I'd guess it might not be any good longer term. For outside use and sticking slate, personally I would use the original light brown coloured foaming one. That DOES stick.

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Oily Rag
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Re: Glue

Post by Oily Rag » Mon May 13, 2019 12:47 pm

h'mmm I think the detail lies in the word "resistant" not "proof" shall we say. I have used both the standard Gorilla glue (the polyurethane based version) and the wood glue. However I have not used either fully outside yet. In the past I have used the Evo-Stik waterproof PVA wood glue outside and it stands up quite well particularly if covered with say matt varnish of any sort. This is the one in the blue bottle. My take on this would be "its on the shelf, let's try it out on a less important bit".
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Peter Butler
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Re: Glue

Post by Peter Butler » Mon May 13, 2019 1:48 pm

No matter what adhesive is used on slate there are two important details to consider.....
Firstly slate is non porous (as Philipy has already stated) so will not absorb adhesive, it will just lie on the surface, and secondly slate is a layered material and will de-laminate leaving the adhesive stuck to a very thin sliver of slate while the rest falls off!
I have built structures (walls) using slate slabs by soaking them in SBR (what else?) to remove dust and seal the surface, then bonding with hot glue when dry. This holds the pieces together long enough to allow the structure to be coated with cement render on the inside. I'm sure other materials could be used for this purpose, e.g resin, Gorilla Glue etc.
It will be interesting to hear your progress Rod.
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