Cat candles are used in workings for invisibility, good-luck, power, success, and bewitchment. One way to use them is to make a petition paper with your photo, before doing a deed that you need to keep hidden. Inscribe "Invisibility" in the black cat candle, and anoint in Black Cat Oil and Law Keep Away oil. Burn the candle as you do your work.
Read more about Black Cat Spells & Workings Here.