Tiling a Bathroom

Tile adhesive goes between the wall & the tiles,waterproof grout,silicone round all corners and thats watertight(if done correctly)

For tiling a bathroom, silicone generally always breaks down leaving small holes (sometimes invisible to the naked eye). This causes a capillary action, drawing water into the space between the tile and wall. Most causes of damp and leaks around baths and showers are caused this way. I only ever use Sealux Aquastrap for these reasons.