NATURAL RUBBER Also: pure gum -- Pure rubber (latex base)

Good gasket material due to excellent physical properties such as resilience, tear strength and abrasion resistance. Available in FDA-approved food grade. Hardness: 40 +/-5 durometer Specific gravity is .95 - 1.05, the same as water. Temp: -20o F to 180o F TYPICAL USES: Natural rubber is used because of its high abrasion resistance and used extensively for door and hatch seals because of its superior resilience.