PIAA Vision Screen Wash a high quality additive which is added to the windscreen washer reservoir. It keeps the windscreen incredibly clean, repelling rain, sleet and snow and even helping to remove flies and insects. Although it works extremely well on its own, even better performance can be obtained when used with PIAA VISION Protect and Coat. PIAA VISION Screen Wash also enhances the already brilliant performance of PIAA Super Silicone Wipers, ensuring excellent visibility is maintained all year round - in all weathers.