The Zinc core wick is a unique construction that provides maximum rigidity in a wide variety of candle systems. The Zinc Core's jacket design is 100% all-natural and maintains unmatched rigidity in the molten wax pool. Zinc Core wicks are cotton braids with an inner zinc core (no lead alloys). They are suitable to be used in tealight, votive, pillar, and container candles. The potential for mushrooming resulting from carbon buildup can be minimized by using the proper wick size and keeping the wick trimmed. Zinc core wicks are cooler burning and can be used in paraffin wax.