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Mapeproof FBT is a waterproofing membrane made up of a synthetic FPO sheet tightly coupled to a layer of non-woven fabric. When it comes into contact with poured concrete it forms a tough bond with it. Mapeproof FBT is resistant to natural agents and aggressive substances normally found in groundwater and in the soil. It is highly durable and resistant to ageing from UV rays while normal site activities are being carried out. Mapeproof FBT forms a highly effective barrier against groundwater, moisture in the ground, radon and methane.