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A water-resistant underlayment that delivers support for hardwood, ceramic tile, carpeting and more in homes or light commercial building. Fiberock Brand Underlayment represents a new era in substrate performance for wet or dry areas. It has an integral water-resistant composition that offers durability, superior performance and exceptional tile bond that is not susceptible to the same warping often found in traditional wood underlayment.Uniform composition provides both strength and water resistance,Use in both wet and dry areas throughout the home,Ideal under tile, stone, vinyl, hardwood flooring, laminate flooring and carpeting,Superior tile bond three times industry standard,Provides a smooth, flat and paintable surface for wall applications,Free of resins, adhesives and solvents that might stain a vinyl floor,Easy to cut, fasten and install