Prist anti-icing fuel additive was developed to meet the high demands of the aviation industry. The formation of ice crystals in fuel tanks can block the aircraft fuel line or filter, causing engine failure. Prist Hi-Flash Hi-Flo anti-icing fuel additive controls icing in aircraft fuel by depressing the freezing point of water. This next-generation additive is less toxic, less volatile and much easier to use compared to conventional additives. Prist has been approved by the United States Armed Forces as well as ASTM.