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LD-SRIM process technology, which can be readily tailored to match material physical property requirements to end-use applications, is answering the interior trim automotive engineers call for high quality, durable and cost-effective low weight composites. Due to their versatility, LD-SRIM composites, produced by reinforcing a water-blown MDI polyurethane foam matrix with a non-woven fiberglass mat, are successfully displacing PP and ABS thermoplastics, as well as wood fiber composites, in a wide variety of interior trim substrates. The technology's benefits, such as the ability to produce low weight parts (down to 0.27 g/cc for door panels) via pour-in-place techniques, and recent developments in internal mold release (IMR) formulations, have resulted in dramatic growth as demonstrated by its use in an expanding number of North-American produced vehicles.