The application of natural polymeric products or those that can be prepared from sustainable sourcing is a popular trend. The tire industry is a leader, expanding the use of bio-sourced elastomers from traditional natural rubber to guayule, for example. However, low molecular weight oligomeric materials are also being evaluated for use, including natural oils such as orange10 and modified soybean oils11 as additives to improve tire performance. The automotive industry has also embraced the use of natural products in place of petroleum-derived sources, especially in polyurethanes. Naturally derived polyols used for polyurethane foams include castor oil and polyols produced from soy, peanut, or canola oils