This item comes in pellet form.
An opacifier and hardener commonly used when stearine is not appropriate (eg with latex moulds)
As well as opacifying and hardening, it helps retain oils - usually from perfumes - to minimise the sweating of the oils from the candle.
Mix at up to 2%
Vybar is often added to improve scent throw and it is its ability to retain oils that gives it that characteristic. Use the Bipol-X to increase the amount of fragrance wax will hold.