Low-temperature applications for seals are critical to a number of industries. Pharmaceutical, medical, aerospace, petrochemical, oil, and gas, food and dairy all rely on sealants that must perform in low-temperature environments. When a seal reaches its low-temperature limit it will harden, become stiffer, begins to lose its elastic properties and flexibility, and crack. As the temperature lowers, at some point it will undergo a glass transition phase and become glassy and brittle. If a state of glass transition occurs, though some elasticity may be present, the seal will no longer function. Once a leak path has formed in a seal, even after temperatures return to “normal,” the leak path will remain.