The base of the bait is cellulose which termites love and is found in timber, the active ingredient is called Chlorfluazuron which is a growth inhibitor. The bait doesn’t kill the termites on contact, they take it back to the nest & over a period of a few months depending on the size & type of termite you will achieve full colony elimination. It is the ONLY scientifically proven way to get rid of a complete colony of termites!