Complete Waterproofing Protection for Tiled Shower and Wet Area Installations

The Schluter KERDI Bonded Waterproofing and Vapor-Retardant Membrane is a high-performance sheet membrane designed to provide reliable waterproofing and vapor management beneath tile installations. Installed directly under ceramic or stone tile, it creates a continuous barrier that protects the substrate from water penetration.

This membrane is widely used in tiled showers, bathtub surrounds, and other moisture-prone environments where effective waterproofing is essential. By preventing water from reaching the underlying structure, it helps maintain the durability and integrity of the entire tile assembly.

Advanced Polyethylene Membrane with Integrated Vapor Barrier

At the core of Schluter KERDI is a modified polyethylene (PEVA) sheet that functions as both a waterproofing layer and vapor barrier. This construction helps control moisture migration while maintaining flexibility for easy installation on various surfaces.

The membrane provides dependable protection in environments exposed to frequent water contact and humidity, including residential steam showers and wet rooms. Its vapor-retardant properties help limit moisture buildup behind the tile surface.

Fleece-Laminated Surface for Strong Mortar Bonding

Both sides of the membrane are covered with a non-woven fleece layer designed to anchor securely into thin-set mortar. This fleece layer creates a strong mechanical bond between the membrane and the substrate or tile layer.

This bonding system ensures the membrane remains firmly integrated within the tile assembly, allowing installers to achieve consistent adhesion and long-term performance in demanding wet environments.

Consistent 8 Mil Thickness for Reliable System Performance

Schluter KERDI features an 8 mil (0.2 mm) thickness, providing a balance between flexibility and durability. The uniform thickness ensures consistent waterproofing coverage across the entire installation area.

Because the membrane is lightweight and flexible, it can be applied to both vertical and horizontal surfaces with ease, helping contractors create a continuous waterproof layer across walls, floors, and other tiled surfaces.

Extra-Wide Membrane Roll for Faster Installation

The 6 ft 7 in (2 m) wide roll is designed to streamline installation by covering larger wall sections with fewer seams. In many shower installations, the membrane can extend from the floor up to the standard showerhead height in a single sheet.

This wider coverage offers several benefits:

• Fewer seams and joints in the waterproof layer

• Reduced installation time

• Improved waterproofing continuity

• Cleaner and more efficient project workflow

The reduced number of overlaps also helps maintain the integrity of the waterproofing system.

Ideal Waterproofing Solution for Showers, Steam Rooms, and Wet Areas

Schluter KERDI is engineered for a wide range of tile installations where moisture protection is critical. It is suitable for both residential and light commercial environments.

Common applications include:

• Tiled showers and shower enclosures

• Bathtub surrounds

• Residential steam showers

• Bathroom walls and floors exposed to moisture

• Wet rooms and spa environments

Its bonded waterproofing design allows tile to be installed directly over the membrane, simplifying construction while maintaining effective protection.