In short, we love glitter! No, it won't interfere with the burning or performance of your candle (and who needs performance issues, anyhow?). It won't catch on fire (trust me, I've tried to catch it on fire... I just can't). It will basically float on top of the hot wax, it will stick to the insides of the container, and it will continue to reflect the firelight while you burn your amazingly beautiful and sexy candle! It's mesmerizing!