The present invention relates to poly urethane/urea-forming casting composition that can be cast and cured at temperatures between 15 and 35 DEG C using a reaction mixture of (a) an isocyanate component or an isocyanate functional prepolymer having at least two isocyanate groups per molecule that contains or has been reacted with polytetramethylene glycol; (b) an aromatic amine curative; and (c) a phosphate ester or phthalate ester having a vapor pressure of less than 100 mPa at 25 DEG C. The present invention further relates to a cast polyurethane and a process for curing a poly urethane/urea-forming composition.
