Polyisoprene (isoprene rubber) is created by polymerizing natural isoprene. As an unsaturated hydrocarbon, isoprene is found in a variety of plants and animals, including humans. When modified, these synthetic elastomers closely resemble natural rubber in molecular structure and properties. Polyisoprene is often used in applications requiring good resilience, low water swell, high gum tensile strength, good tack, and high hot tensile strength. The largest end use for polyisoprene is in tires. Check out our selection of tubeless tire gaskets made from this material. Polyisoprene can also be found in pipe gaskets, shock absorbers, and many other mechanical applications, but is seeing fast growth in medical sealant applications.