Pilkington has marked 21 years of its "K" Glass, low-emissivity glazing brand with the launch of the soft coated product, Pilkington K Glass S. Announcing the launch, David Pinder, MD Pilkington Building Products UK said: "This advance in the Pilkington K Glass product range mans our coated glass range offers the widest choice on the market. Customers can now easily find a solution for any processing technique or to achieve an "A" rated window energy rating (WER) in any framing system." Pilkington K Glass S is a single stock coated glass which can be used in both annealed and toughened formats, with the added advantage of retaining the same thermal performance and neutral appearance. Once fabricated into an IGU, it can be used in all types of window and in a variety of glazing applications from new-build, to replacement windows in existing homes and conservatories. Pilkington K Glass S helps ensure windows exceed Part L 2010 regulations and is said to provide an improved option for changes expected in 2013 and 2016. When combined with Pilkington Optiwhite in an insulating glass unit, it qualifies for Pilkington energiKare energy efficient glazing and ensures a WER rating of "A" in all frame materials. BFRC, Certass and FENSA have all certified the K Glass S range as being interchangeable with any other low emissivity product, with equal or inferior performance, without the need to obtain new simulations. The product is to be offered through selected routes to market from 1 November 2011.