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.
The surface of the cover layer is filled during manufacture with the same bentonite as in the centre of the membrane to facilitate continuity of bentonite across the membrane and the creation of impermeable overlap joints.