A few years ago I was ferrying a Yak 50 to UK and, after night stopping in Gdansk (-20 over night), awoke to find the said Yak all iced up. I asked one of the handlers about de icing fluid. He looked at the Yak, went away and came back 10 minutes later with 5 x litre bottles of car anti freeze. 2 cans per wing, 1 for the tailplane and 20 minutes later I was on my way with a de iced Yak 50.
Reichman