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Compared to autoclave based processes, RTM offers several key advantages. This includes: high internal and external complexity, less waste, lower volatile emissions, higher production rates, and excellent surface finish. However, the injection of high pressure - high temperature resin presents a tooling challenge in cases where trapped geometries exist. A large opportunity exists for new tooling technology that can withstand RTM conditions and be easily extracted from the composite after the cure cycle. A new tooling system ("RTM Core") is presented and compared against other washout systems and their ability to withstand resin transfer conditions in industrial processes. RTM Core tooling materials are designed to withstand high temperature-high pressure process conditions without the need for complicated surface sealants and are designed to be removable with tap water. Our research will cover the preliminary characterization of tooling system properties, mechanical behavior, and initial results from a composite manufactured using resin transfer molding. [ABSTRACT FROM AUTHOR]