images/Photos/pipeline.jpg Free Flow 425 is an internal diameter, waterborne liquid epoxy/silicone coating system designed for flow efficiency applications. Applications include but are not limited to: Oil, gas, natural gas, and LNG transmission pipelines, water, waste water, intake and discharge piping. The dual functionality of Free Flow 425 technology provides the durability and abrasive protection of epoxy coupled with the enhanced flow/drag reduction and surface release properties of silicone.