Radon Barrier Mesh Reinforced Resin Screed IRELAND KLB PU420 screed with polypropylene sheet mesh reinforcing forms a flexible crack bridging system that forms a barrier to the flow of radon gasThe 5mm screed is laid on an EP52 anti damp penetrating primerA levelling EP50 pigmented screed is then laid at 2mm, followed by a 3mm PU420 screedFor full ultra violet resistance the final screed may be changed to PU410The system carries our five year warranty on both material and application