110 Hours Soy Wax All Season Clean Burning If you are concerned about indoor air pollution from paraffin candles, try Swan Creek Candles Clean Burning, Lead Free, Intensely Fragrant American Soybean Wax Candles. The heavy metal lid also works as a flame snuffer. Each jar includes signature soybean crumbs on the top of the candle. Decorative label is removable. Approximate burn time 110 hours.