Based on its hardness and specific gravity, Non Asbestos Green Sheet is an environmentally friendly, commercial-grade combination of natural and synthetic rubber. The least expensive sheet we have available that may be used for a variety of purposes is this Non Asbestos Green Sheet. Due to the extremely low thermal conductivity of this green sheet, there is a reduction in the conductance of heat or cold. It maintains a lower interior temperature than the outside environment. assures a quiet and peaceful environment.