Called back by customer whose Gulf Stone floor tiles I rescued and relaid earlier this year ( were dot'n'dabbed on 6mm hardboard !!!!!!!! ). The bathroom 'fitter' has left a 10mm gap between tile and shower tray which has been carefully GROUTED. Unsuprisingly, this has started to crack and is leaking below. Does anyone know of a product which could seal this large gap? I thought Schluter did something but can't see it on their website. I remember seeing something like the old 'L' profile bath seal but more flexible......