Waterproofing Membrane 54Sq Ft 8Mils 3.3ft x 16.5ft Shower Waterproofing and Crack Prevention Membrane Underlayment for Tile, Shower Walls, Bathroom Flooring, Wet Room, Sauna, Steam Room - Amazon.com
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Waterproofing Membrane for Bathroom, Shower and Tile Flooring | 3 Ft 3 inch x 66 Ft (1 Meter x 20 Meter) | 216 Square feet | 8 mil Thickness | Roll Package (3.3 Ft by 66 Ft) - Amazon.com