Castor oil is a natural polyol widely used in the manufacture of polyurethanes, lubricants, surfactants and many oleochemical products. Castor oil is a renewable biobased product, but its production is geographically limited resulting in fluctuations in supply and price. We have developed plant lipid-based polyols which have properties similar to those of castor oil and which could be drop-in replacements for it in various applications. These will be cost competitive to castor oil and made from seed oils that can be grown on the Canadian prairies. Camelina oil is used produce castor oil replacement polyols (COROL) and advantageously, it is has been developed as a non-edible vegetable oil for use in industrial applications. Camelina oil contains suitable amounts of unsaturated fatty acids for further chemical modifications. In this work, oil is subjected to a controlled derivitisation process, as described in a recent patent application, which both preserves the triacylglyceride structure and results in a similar amount of hydroxylation and viscosity to that found in castor oil. The reaction of castor oil and COROL polyols with p-MDI to produce polyurethanes was studied via their rheological behavior during curing, which established the relative reactivities of castor oil and COROL polyols. The thermo-mechanical properties of the PU produced using castor oil and COROL polyols were evaluated by DSC and DMA. Results indicate that in PU applications the reactivity of COROL polyols can be readily adjusted to match that of castor oil. However, the thermo-mechanical properties (e.g. Tg) of cured PU made using COROL significantly exceeds those made using castor oil. Overall, this study demonstrates that biobased polyols from plant oils can be produced with a range of viscosities, hydroxyl functionalities and overall reactivities that include those found in castor oil. The ability to adjust these parameters offers a significant advantage over castor oil.