Armaflex With its exceptional, inbuilt, water vapour barrier Armaflex is particularly effective at preventing moisture ingress and ensuring long term thermal efficiency. The thermal properties of Armaflex will not rapidly deteriorate over time as other insulation materials may and, by keeping moisture as far from the pipe surface as possible, Armaflex reduces the risk of expensive under insulation corrosion. SAI INSULATION INDIA IS A LEADING FOR NITRIL RUBEER SHEET TUBE Manufacturers, Suppliers & Wholesalers The in built water vapour of Armaflex comes from its closed cell structure. Armafl ex comprises thousands of interconnected closed cells, each with an inherent resistance to water ingress. As such the vapour barrier of Armaflex cannot be compromised by surface punctures or tears. In addition Armaflex is dust and fibre free. It will not emit any particles or fibres, even when cut into shapes and fittings.