A waterproofing membrane comprising a structure incorporating a fiber layer and wherein to one side of said structure a bituminous mass is applied and another side of said structure is covered on its surface with a substance comprising a mineral or organic filler and an acrylic polymer, whereby said substance comprises between 15% and 25% by dry weight of said acrylic polymer and mixed therewith between 4% and 22% by dry weight of titanium dioxide.

 
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