Proofex Hydromat consists of two elements – Natural sodium bentonite as the sealing material, Two layers of geotextile to encapsulate and contain the bentonite. A continuous layer of natural sodium bentonite is sandwiched between a needle-punched polypropylene geotextile (the cover layer) and a slit film woven geotextile (the carrier layer). The components are needle-punched together uniformly across the membrane to hold the bentonite sealing material in a stable position.