"Am not pleased with this product for fixing even small ceramic wall tiles.
I bought it on a bit of a whim thinking I'd be able to both stick and grout the tiles with one product, and hence it justified a bit of a higher price than other separate products. After well OVER the recommended 24hrs drying time, upon taking out the spacers, about 10% of the tiles just fell off the wall. I daren't tempt fate with the rest of them, but lesson learnt, in future use a cement based powdered adhesive.
Screwfix usually stocks very good products, and I thought Unibond was a good brand, but this certainly has changed my thinking."