TKS de-ice systems are more popular than ever, but finding refills for your airplane’s TKS system has been surprisingly hard. Aerodyne is now proud to offer Kilfrost TKS 406B for sale, in GA-friendly container sizes. This is the original, authentic TKS fluid—Kilfrost put the 'K' in TKS. Contains a mixture of glycol and alcohol and offers excellent ice protection (freezing point below -60°C). Can also be used to remove frozen deposits from aircraft on the ground.