Mapei Mapegum WPS is a flexible liquid waterproofer suitable for waterproofing walls and floors in bathrooms and wet rooms. Use with Mapei Mapeband to provide further reinforcement on junctions and corners.

Key Features

• Suitable for interior use
• Ready mixed and easy to use
• Provides a flexible waterproof membrane on most common substrates
• Reinforce with Mapeband

Surface Preperation
Substrates must be solid, clean, dry and free of oil, grease, old paintwork or any other material which could compromise bonding. Thoroughly clean all the mould, loose material etc. from existing surfaces to be waterproofed by washing and brushing them down, or by spraying water and steam. Cementitious substrates must be stable and dry, and not subject to rising damp. Substrates which are highly absorbent or gypsum must be pre-treated with Primer G. Wait several hours until the coating of primer G is completely dry. Anhydrite or gypsum substrates must be perfectly dry, sanded and treated with a coat of Primer G or Primer S. Existing substrates of ceramic tiles or natural stone must be treated with Mapeprim SP primer before applying Mapegum WPS. If a slope has to be created and the base needs to be smoothed off before spreading on Mapegum WPS, use one of the recommended MAPEI products.

Recommended Systems
Mapegum WPS may be applied by trowel, with a roller, by brush or spray. This product must be applied evenly in thin coats. Wait until the first coat is dry before applying further coats crossways. The final thickness of Mapegum WPS must never be less than 1mm, in order to form a consistent, flexible continuous coat. Make sure that there are no gaps caused by imperfections in the substrate. After 12-24 hours from applying the final coat of Mapegum WPS, the surface is ready for laying ceramic tiles or natural stone etc. Use an adhesive from the MAPEI range to lay ceramic tiles and natural stone; class C2 if it is cementitious based or class D2TE if it is a water dispersion type, in accordance with Standard EN 12004. In order to guarantee continuity in the waterproofing coat, we recommend placing Mapeband, alkali-resistant rubber tape with felt, between the wall and the floor and between contiguous walls before applying Mapegum WPS. Mapeband or Mapeband PE 120 must be bonded to the substrate using Mapegum WPS and must be completely embedded in the waterproofing layers.

Consumption
The consumption of Mapegum WPS is approximately 1.5kg/m² per mm of thickness.

Technical Characteristics
Mapegum WPS is a ready-to-use, solvent-free, single component, grey-coloured paste with a base of synthetic resins in water dispersion. Mapegum WPS has a thixotropic consistency which makes it easy to apply on horizontal, sloping and vertical surfaces. After rapid evaporation of the water content, Mapegum WPS forms a flexible membrane which is not sticky and which is strong enough to withstand light pedestrian traffic. It also forms an excellent surface which bonds perfectly to adhesives used for laying ceramics, marble and natural stone. The flexibility of Mapegum WPS enables it to withstand normal expansion and contraction movements of the substrate due to temperature variations and vibrations. Thanks to the flexibility of Mapegum WPS, it acts as an anti-fracture membrane for substrates which are subject to light cracking.