TILITE USA 20.25 in. x 12.25 in. x 3.5 in. XPS Foam Waterproof Underlayment Niche with Adjustable Shelf in Gray

Made from the same material as tīLite Backer Board, tīLite Waterproof Niches are light-weight, waterproof and vapor-resistant for wet areas. It is XPS foam manufactured with a waterproof proprietary blend of synthetic polymer mortar and an alkali resistant fiber mesh. Each tīLite Niche comes with an adjustable shelf.