With a built-in moisture barrier and highly water-resistant core DensShield tile backer from Georgia-Pacific Gypsum offers a moisture- and mold-resistant substrate for tile. Featuring a Type X core, DensShield doesn’t require mineral wool for a fire rating, in addition to not needing a vapor barrier in wet areas. Lifetime limited warranty when used in residential applications.For details, circle 175 on the Reader Inquiry Card.