Schluter® KERDI-BAND 5" Waterproofing Strip — 98.5 LF RollKERDI BAND is the seam tape that actually waterproofs every joint, seam, and transition in a KERDI or KERDI BOARD assembly needs it. At 98. 5 linear feet, this is the contractor roll for full shower builds and large waterproofing jobs. Same modified polyethylene core and polypropylene fleece as full KERDI membrane 5" wide strip provides 2" overlap onto each surface at every joint 98. 5 linear feet (100 125 format) enough for a complete shower stall