Fragrance Oil for Oil Candles. This fragrance oil is a concentrated oil made with pure essential oils. Formulated for use in oil candles, or oil burners to create a delightful warm scent to your home. Our fragrance oils are packaged in 1 oz. glass dropper bottles for longeivity and for your convenience. You may add a drop to the top of your wick on your oil candle to scent the room when the candle is not lit. Add fragrance oils to your oil candles to achieve a fragrance strength to suit your preference.