What is a glass splashback? Tiles are commonly used behind kitchen worktops and sinks. Glass splashbacks are an alternative to tiles. They are colourful and easy to clean. Glass splashbacks are ideal for a modern looking kitchen. You can get glass splashbacks in almost any colour. Things to bear in mind if you go for a glass splashback are that you must plan where you electric sockets are from the start as the glass cannot be cut once it has been touchened. Glass splashbacks tend to be made from toughened float glass and usually range from 6mm to 19mm in thickness.