POLYMER OH 1 is a hydroxy-terminated polydimethylsiloxane with a viscosity of 1000 mPas at 25°C. It acts as a base polymer used in condensation curing silicone elastomers for advanced materials. POLYMER OH 1 can be cured with usual condensation cross-linkers such as alkoxy silanes, acetoxy silanes, oxime silanes and enoxy silanes in connection with catalysts. This provides high strength, flexibility and temperature resistance to developed advanced materials. Especially the low viscosity of POLYMER OH 1 makes it suitable as a reactive diluent for viscosity adjustment in mixtures with higher viscosity polymers during advanced material formulation, enabling optimized material properties.