Currently in the polyurethane industry, the suppliers of the raw materials provide information on how to process materials without always explaining why these recommendations are being made. This volume provides an understanding of the background of such recommendations and describes how they achieve desired outcomes. This book discusses the production of polyurethane components from theoretical and practical aspects. The text progresses from raw materials to the production of prepolymers, covering the different types of available systems, the reasons for choosing the right system on micro and macro levels, and curing and post-curing operations, while also addressing health and safety issues at each stage.