Neoprene Rubber Sheets, Rolls, and Strips: The Rubber Strips are made of high quality solid rubber material, which is quite different from the ordinary sponge or foam strips. With elevated tensile strength, superior heat resistance, resistance to light, aging, and superior oil resistance when compared to natural rubber, Neoprene Rubber stands out. The inherent mild aroma of neoprene rubber strips (rolls) fades over time. Allowing the rubber to be exposed outdoors for a period of 1-3 days will lead to the gradual dissipation of the scent.