Sempre Concentrated All Season Screen Wash Sempre is a specially formulated screen wash concentrate that is made for adding to water in vehicle washer bottles. It cuts through dirt and grime from roads and traffic leaving a clean and sparkling smear free windscreen. The special formulation helps wiper blades glide smoothly over the screen and eliminates annoying judder. When used as recommended, Sempre is suitable for all year round use and will prevent the washer bottles, pipes, and pumps from freezing at temperatures down to –18oC, and will also help prevent the icing of nozzles that are exposed to the icy blast of the slipstream.