The plastic bit which has 'Hot'/'Cold' on it came off (and got lost but now have a replacement) It was originally held on by some soft jelly like washer which got damaged.
I'm now planning to stick on with some sort of glue but not sure what. I've got silicone sealant but not sure what the adhesive powers of that will be? I've also got some bathroom mirror adhesive and some epoxy adhesive. Or is there something else I should purchase?