How much does this cost to the nearest dollar?

IB Tools Shower Waterproofing Membrane 20 Sq Ft For Ceramic Tile And Stone Tile, 20 mil Thick Wall And Flooring Underlayment
The vapor-retarder IB Tools waterproof membrane for home improvement provides superior protection for your shower tile and bathroom tile. It ensures a long lasting and durable finish (high resistance) due to its ability to prevent water damage to floor tiles. The fabric of this waterproof flooring membrane binds the substrate below it and the layer above it (bathroom tiles and other types of floor tile). The IB Tools tile underlayment is installed using the uncoupling membrane mortar (thin-set mortar adhesive). This flooring underlayment has a low permeability rating for vapor protection in a shower or steam room to make your underlayment for tile waterproof. IB Tools tile membrane

Price is $49.00

Price: $48.95