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Old 07-21-2012, 03:42 PM
coling coling is offline
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Join Date: Jul 2012
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What adhesive should I use to glue EPDM to rock/cement?

Hi,

I am a novice to building waterfalls, which is what my question is for.

Having laid 20ft x 5ft EPDM and built the first of two stone faces, I want to glue a fold of the EPDM to the back of the stone. This is so that the water will not fall down the back of the stone but rather over the front of it - down to the next level - I hope you can picture this.

My question is: What adhesive is best to glue the EPDM to the stone (+ cement)?

I will not have any fish, so that can be eliminated. The adhesive will forever be under water - even if it's only half an inch. I don't expect that there will be any tension in the EPDM, although I cannot be 100% sure of this. And of course the temperature will vary from summer to winter (northeast).

Is silicone (adhesive) better than polyurethane or epoxy? I would think it is better that the adhesive has flexibility - I suspect that polyurethane may become too rigid, but I wonder if silicone is better as a sealant than as an adhesive.

Has anyone had any experience with this?

Regards

Colin G
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