The active ingredient in the Foamstream process is the heat in the hot water. The foam simply acts as an insulating blanket over the top of the hot water, ensuring heat is not lost to the atmosphere.
The longer a plant is kept in the kill zone (temperatures above 57˚C) the better. By providing a layer of insulation, Foamstream holds the heat from the water in the kill zone for long enough to penetrate the leaf’s waxy outer layer, and travel down the stem and into the roots. This severely damages the plant, either killing it or causing it to die back.
Foamstream holds the plant in the kill zone for longer than any other alternative thermal method. Watch our process video here.