Polyethylene Wax is used to add a glossy surface to pillar, votive, and other molded candles. This will increase candle hardness and will affect the candle burn rate.
A larger than typical wick is usually necessary when using Polyethylene Wax as an additive.
Addition will also help with color distribution. Polyethylene Wax will prevent mottling. Use should be limited to less than 2%.