ICE-5 Fuel anti-icing additive
ICE-5 fuel system icing inhibitor (FSII) : a fuel anti-icing additive for turbine fuel that acts as a fuel icing inhibitor. ICE-5 is mixed in the fuel at rates of 0,10% up to 0,15% by volume. If the aircraft has no heating system for the fuel, small amounts of free water in the fuel can freeze and block fuel lines, filters and valves. Properly used ICE-5 will prevent icing of the water in the fuel system. A positive side effect of ICE-5 is inhibition of bacteria-growth in fuel tanks.