KERDI-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 including all corners, floor-wall transitions, and panel seams
• Set in unmodified thin-set mortar — the fleece bonds into the mortar on both sides, creating a continuous waterproof joint integral to the membrane system

Pro tip: Don't skip inside corners — pre-form the band into an L-shape and press it into the corner with a margin trowel. Corners are where most waterproofing failures start.