Schlüter®-KERDI/KERDI-KEBA | Material | Schlüter-Systems



Schlüter-KERDI-200 is a polyethylene membrane for bonded waterproofing assemblies with a water vapour retardant value of sd = 5.15 m.

Schlüter-KERDI-DS is a special polyethylene membrane for bonded waterproofing assemblies and serves as a vapour barrier with an sd value of more than 100 m, which is considered a vapour barrier in physical construction terms. The waterproofing membrane is 0.5 mm thick and equipped with water vapour blocking additives.

The material is physiologically harmless. Cutting waste of both material types is not classified as hazardous waste. Polyethylene is not UV stable in the long term; the product should not be stored in places with prolonged exposure to direct sunlight.


Since bonded waterproofing assemblies with Schlüter-KERDI do not have the necessary uncoupling function for screed and tile coverings in outdoor areas that are subject to temperature changes, we recommend the use of Schlüter-KERDI in conjunction with Schlüter-DITRA-DRAIN (see product data sheet 6.2) or Schlüter-DITRA 25 (see product data sheet 6.1) for a combined bonded waterproofing and uncoupling function.

Material properties and areas of application

Schlüter-KERDI is waterproof and resistant to most chemicals commonly encountered in tiled environments. It is resistant to ageing, does not rot and is characterised by its elasticity.

Schlüter-KERDI is highly resistant to saline solutions, acid and alkaline solutions, many organic solvents, alcohols and oils. Information regarding its resistance to specific stresses can be provided if concentration, temperature and period of exposure are known.

Verify that the substrate on which Schlüter- KERDI is to be placed is even, load bearing and free from moisture. Surfaces which inhibit proper adhesion must be removed or appropriately treated.

Schlüter-KERDI is suitable for wall and floor surfaces where protection against the penetration of moisture or other harmful substances is necessary.

Surfaces include bath tub surrounds, showers and areas surrounding swimming pools. Industrial applications include, the food industry, breweries and dairies. Swimming pools and similar structures are subject to special requirements. Please contact us for further information if you are planning this type of project.

Contact Schlüter-Systems Ltd

Units 3-5 Bardon 22,
Beveridge Lane, Coalville,
Leicestershire, LE67 1TE
Phone: +44 (0) 1530 813396

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We use the following symbols and abbreviations to illustrate our price charts.

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= new products

= radius perforation available   


H = height
L = length
B = width

PL = euro pallet 
KV = case packaging 
BV = bundle (there is a 10 item bundle packaging for all the profile types)
P = box packaging 
R = roll
St. = unit