Klean-Strip GKE83 is a 1-K kerosene heater fuel, refined to lower the sulfur content, improving air quality and extending wick life. It burns cleaner than 2-K kerosene and meets ASTM 1-K Specifications. Suitable for all kerosene-burning heaters, lamps, and stoves, it can be used indoors with adequate ventilation to prevent vapor buildup. Always follow the appliance manufacturer's directions for safe and proper use.