The Tile Rite Pro+Mat Heavy-Duty, Anti-Crack Tile Underlay 5m² is a waterproof, vapour-proof uncoupling membrane suitable for crack isolation in most tile, porcelain or natural stone installations. The Tile Rite Pro+ Mat is an under armour for tiled floors and can be applied over challenging substrates such as over green concrete (young) and single layer plywood (48cm) supported floors. Perfect for absorbing stress and preserving the integrity of the tile when exposed to excessive substrate movement, the Tile Rite Pro+Mat underlay has reinforced fleece which locks mortar into the mat, ensuring a strong, durable and reliable installation.