National Gypsum

PermaBase Flex Cement Board Underlayment

PermaBase® BRAND 1/4" Cement Board Underlayment is a rigid substrate made of Portland cement, aggregate and glass mesh that provides an exceptionally hard, durable surface that is able to withstand prolonged exposure to moisture. PermaBase 1/4" Cement Board is ideally suited as an underlayment for ceramic tile on floors, countertops, tub decks and outdoor kitchen

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