Schluter Kerdi Band Waterproofing Strip – 33 ft x 5 in, 4 mil, seals butt joints and floor-wall connections

Schluter Kerdi Band Waterproofing Strip

Meet the Schluter Kerdi Band Waterproofing Strip, a precise 33 ft long by 5 inch wide solution with a slim 0.1 mm profile. Engineered to manage moisture in wet environments, it helps create seamless, fully waterproof joints where floors meet walls and where Kerdi and Ditra membranes or Kerdi-Board panels connect. This strip supports a clean tile surface and reduces the risk of moisture transfer at critical seams.

Why this strip matters in real projects

Bathrooms, kitchens, and other high-moisture zones demand trustworthy joint protection. Kerdi Band acts as a continuous belt of defense along butt joints and surface transitions. Its material adheres firmly to inside and outside corners, maintaining integrity even where surfaces change direction, which helps keep tiles looking even and flat over time.

Key benefits and capabilities

• Optimal waterproofing performance — creates a tight, continuous seal at joints to help prevent moisture wicking in complex tile installations.
• Versatile application — designed to seal butt joints and connections between floors and walls using Kerdi and Ditra membranes as well as Kerdi-Board panels.
• Superior adhesion — adheres to both inside and outside corners, maintaining its integrity without surface rounding at transitions.
• Slim profile — at just 0.1 mm, it avoids tile build-up and helps preserve a smooth, flat surface for tile installation.
• Long-term coverage — backed by a 10-year limited warranty when installed per the Schluter Installation Handbook and Technical Data.

Real-world use cases

• In a shower enclosure, seal the joint where walls meet the floor to reduce potential leakage paths.
• In kitchens and wet zones, protect wall-to-floor transitions and ensure a consistent waterproof envelope around plumbing fixtures.
• With Kerdi-Board installations, create a unified waterproofing layer across vertical and horizontal surfaces for simpler maintenance.

Installation tips

Prepare surfaces per Schluter guidelines, cut to fit precisely, and embed the strip within the corresponding membrane or tile bed. Pair with approved primers and compatible membranes to maximize adhesion and lifelong performance.