I've had the Aeroshell TKS fluid from Silmid.
Hugely expensive stuff - not sure anybody would use it for de-icing the airframe. One 20 litre drum was about £200, and it is very heavy - I bet the stuff as a SG higher than water because I can lift 20kg easily enough.
Flying schools use all kinds of stuff, sprayed on with the B&Q pump-up bottles used to spray Cuprinol etc on wooden fences, but the rental scene isn't that worried about long term corrosion issues.