80's Owl Posted December 19 Share Posted December 19 We have quartz worktops with a white plastic double bowl underslung sink, this was adhered to the underside of the worktop at the time of the original fitting, it's starting to come loose at end where the smaller bowl is and a gap is appearing allowing water through, it looks like I may have to disconnect the wastes, remove the sink and refit it, what will be the best adhesive to use? Link to comment Share on other sites More sharing options...
Marvin Posted December 19 Share Posted December 19 Hi @80's Owl Not sure of your set-up but here's a helpful guide. M https://www.thespruce.com/after-reinstalling-sink-reapply-caulking-1822208#:~:text=Undermount sinks are secured beneath,need to be re-tightened. Link to comment Share on other sites More sharing options...
Gone West Posted December 19 Share Posted December 19 In case you don't have any luck with adhesive we used G Clips for attaching our underhung sinks to our granite worktops. https://www.gclip.co.uk/Undermount_sink_installation.html Link to comment Share on other sites More sharing options...
80's Owl Posted December 19 Author Share Posted December 19 33 minutes ago, Gone West said: In case you don't have any luck with adhesive we used G Clips for attaching our underhung sinks to our granite worktops. https://www.gclip.co.uk/Undermount_sink_installation.html I don't they'd be suitable as we don't have that thick lip on the sink edge. Link to comment Share on other sites More sharing options...
Gone West Posted December 19 Share Posted December 19 3 hours ago, 80's Owl said: I don't they'd be suitable as we don't have that thick lip on the sink edge. We fitted a Schock sink which had a flat flange about 8mm thick IIRC. Link to comment Share on other sites More sharing options...
80's Owl Posted December 19 Author Share Posted December 19 1 hour ago, Gone West said: We fitted a Schock sink which had a flat flange about 8mm thick IIRC. The lip on ours is only about 4mm, someones recommended a CT1 adhesive. Link to comment Share on other sites More sharing options...
Gone West Posted December 19 Share Posted December 19 1 hour ago, 80's Owl said: The lip on ours is only about 4mm, someones recommended a CT1 adhesive. I looked at using adhesive for ours, but when I thought of the weight of a double sink full of water I decided to fix it mechanically. 1 Link to comment Share on other sites More sharing options...
joe90 Posted December 19 Share Posted December 19 12 minutes ago, Gone West said: but when I thought of the weight of a double sink full of water I decided to fix it mechanically. Yes CT1 is very good but being OCD I would want some sort of mechanical support with that potential weight. Even a timber support within the cupboard would be more than enough/considered. Link to comment Share on other sites More sharing options...
80's Owl Posted December 19 Author Share Posted December 19 1 minute ago, joe90 said: Yes CT1 is very good but being OCD I would want some sort of mechanical support with that potential weight. Even a timber support within the cupboard would be more than enough/considered. I do have a timber cradle under it tbf but it's under the main bowl, its coming away from the worktop where the half bowl is as it's shallower, once I've redone it ill put someting in to support that as well. 1 Link to comment Share on other sites More sharing options...
joe90 Posted December 19 Share Posted December 19 Well the sink should not bend so timber support on the main bowl should suffice but not difficult to add a bit to support the smaller bowl as well 👍 Link to comment Share on other sites More sharing options...
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