Thermal composites are created by combining a material possessing especially good thermal properties with another material possessing specific mechanical properties. For this research, a phase change material (PCM) possesses the especially good thermal properties and silicone-rubber possesses the specific mechanical properties desired. Ultimately, what must be determined is whether a micro-encapsulated, commercially-available PCM can be utilized for a silicone-rubber based thermal composite. Previous work has failed to specifically address the use of commercially available PCMs for use in thermal composites. Thus far, a commercially-available and commercially-encapsulated PCM has been mixed in varying ratios with a commercially-available silicone-rubber. The micro-encapsulated PCM appears to have disrupted the silicone-rubber’s ability to cure, however, and has therefore limited the number of ratios available for testing. It also appears that the micro-encapsulated PCM is experiencing a chemical reaction with the silicone-rubber; this may be the cause of the silicone-rubber’s inability to cure. Currently, research is still ongoing and conclusions as to the viability of commercially available PCM in thermal composites are yet to be determined.