[Dougaldum]

Window cleaning warehouse are selling an antifreeze at £17.99 for 5l to put in pure water tanks to stop it from freezing. Has anyone tried it and does it work?

[mci services]

It is iso alcohol and it stops freezing in your system but to be effective it needs large quantities, ie 10% to -4 so that is 40 litres for a 400l tank.

although I see they say differently on the website