i am looking to tidy up a grubby corner shower the grout is moldy and i had some one look at it he said i could put this grosflex sheeting over the tiles and it is easy to clean. it looks like tiles but is like a plastic sheetIt looks nice in the hardware shop and looks easy to clean but i am worried about putting it on over tiles and is it going to stay stuck to tiles has anyone used this product and will it seal well i dont want a leaking shower i had one already any info welcome