Description Robart Liquid Sky Smoke Oil – 1 Gallon (128 Oz.) **** CAN NOT SHIP USPS MUST SHIP UPS ONLY******* ****DOES NOT QUALIFY FOR FREE SHIPPING OPTION***** FEATURES: Produces superior smoke plume, white in color with extended endurance Foam safe formula Subtle root beer scent For use with turbine or piston engines equipped with on-board smoke systems Robart recommends storing above freezing temperatures. If product falls below freezing it will discolor and gel up.