Thermally-conductive electrically-insulative silicone meets NASA low-outgassing spec

Master Bond has announced its MasterSil 972TC-LO passes the rigorous requirements for low outgassing as per ASTM E595 specifications. It is particularly well suited to use in vacuum environments as well as applications in the aerospace, electronic, opto-electronic and specialty OEM industries. The two-part silicone system offers convenient handling for bonding, sealing, coating and potting. MasterSil 972TC-LO is an electrically insulator that has a thermal conductivity of 7-9 BTU,in/ft²,hrF [1.01-1.3W/(mK)]. It bonds well to a wide variety of substrates, including metals, composites, glass, ceramics, rubbers as well as many types of and plastics. Highly flexible, MasterSil 972TC-LO has an elongation of 40-80%, withstands aggressive thermal cycling and resists mechanical shock. This heat dissipative silicone system has a wide service temperature range is -120F to +400F. The system does not require air for cross-linking. It features low shrinkage upon curing even in thick or wide cross sections. MasterSil 972TC-LO has a moderate viscosity of 30,000-40,000 cps with good flow properties and has a one to one mix ratio by weight. It has a long working life of 6-10 hours at room temperature. This compound is 100% solids and has a white colour, says the company.