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Schluter Kerdi Board is a waterproof building panel made of extruded polystyrene foam with reinforced faces and fleece webbing that bonds to thin-set mortar. This 48" x 10" x 2" piece is a narrow strip, sized for shower curbs, bench edges, tub surrounds and similar small assemblies rather than full walls. It cuts with a utility knife and has gridlines for marking. Against cement backer board it is far lighter and already waterproof, but it needs seams taped and thin-set over the fleece, and it is not a structural panel.
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Owners of Kerdi Board generally rate the system highly for shower builds, citing light weight, clean cuts and reliable waterproofing when seams are taped. Complaints center on cost against cement board and on the care needed at joints and edges.
This is a pack of five Schluter Kerdi Board panels, each 48" x 10" x 2". The board is a waterproof building panel and tile substrate made of extruded polystyrene foam. Both sides are reinforced, and fleece webbing anchors it in thin-set mortar.
The board cuts with a utility knife and is marked with gridlines to guide shaping. It can be used for shower curbs, bathtub surrounds, countertops, vanities and platforms, and to conceal pipes or columns.
For a bonded, waterproof assembly, tape all seams and joints, then attach tile with thin-set mortar. Store the board flat indoors. If it must be stored outdoors, keep it out of direct sunlight and weather.
