As virgin polymer compound is more expensive than a recycled material, molders want to evaluate the suitability of alternative recycled compound. Can a recycled compound be used to replace virgin polymer compound? Thermal analysis techniques, such as DSC, TGA, TMA and DMA can help to answer this question. Thermal Analysis is a powerful method to understand properties of neat polymers and their compounds. DSC determines thermal transitions like glass transition, melting or crystallization. TGA measures humidity and filler content as well as thermal decomposition. DMA measures viscoelastic mechanical properties and TMA measures coefficient of thermal expansion and thermal transitions as well. Every individual method delivers a certain piece of information to distinguish material properties. When combining these thermal methods a more complete picture of polymer compound can be discovered. In this paper TGA, DMA and DSC with “Identify”, a database search software, are used to characterize recycled polymer compounds, PA6-GF30, for pre-selection, which is used to manufacture injection-molded auto part.