HeatWave is a corrosion inhibited liquid form of calcium chloride that has been tested and proven to be effective to -25 F (-32C). Apply HeatWave before a snowstorm hits and it will provide up to 48 hours of residual activity. This makes cleanup and removal of tough ice and snow FAST! Quick Facts on HeatWave Effective in temperatures as low as -25oF.Reduces granule salt usage by 20-30%Non-flammable & non-corrosiveMade for use before or after a stormReady-to-use, no mixing requiredNo fragranceColor is clear to slightly amberApply HeatWave up to 8 hours before storm