Solvent based HEET De-Gel is designed to help de-ice water/fuel filter in diesel water/fuel separator filters, removes water, liquefies gelled diesel fuel and lubricates fuel system. USAGE DIRECTIONS: To re-liquify gelled fuel, add 32 ounces (946mL) of product for each 30 gallons (113L) of fuel in fuel tanks. Remove fuel filters and fill with 50% diesel fuel. Reinstall fuel filters. Start engine and add STA-BIL Diesel Anti-Gel to tanks to prevent fuel gelling. This diesel fuel additive complies with federal low sulfur content requirements for use in diesel motor vehicles and non-road engines.