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HydraFlex is a two-component flexible coating made of a cementitious powder and a high-concentration liquid polymer.  It can be applied to mineral substrates, such as concrete and masonry, to provide a protective waterproof barrier which can bridge cracks in the substrate so the coating remains water-tight. With superior crack-bridging ability down to -5°C, as well as thixotropic application properties, HydraFlex is a suitable solution for areas at risk of movement in both internal and external environments. HydraFlex is an excellent radon barrier and has passed all the relevant tests for resistance to this gas. 

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