HYDROBLOK Uncoupling Membrane – Designed for ceramic and stone tile installation. Prevent cracked tile and grout. Multi-function underlayment: – crack isolation – waterproofing – antifungal – can be used on a variety of surfaces – save time and cost Reduces the risk of cracked tiles: HydroBlok uncoupling membranes are designed to absorb movement, which helps to prevent cracked tiles caused by shifting substrates or other types of Movement. Saves time and money: Using HYDROBLOK uncoupling membrane can help reduce the time and money needed for tile installation since they negate the need for traditional reinforcing mats or screeds. Can be used on a variety of substrates: HYDROBLOK uncoupling membranes can usually be installed on a range of substrates, including concrete, wood, and even existing tile.