WM

The surface must be properly prepared before applying NEXLER WM. The substrate intended for product application should be continuous, bonded, seasoned and load-bearing. If the substrate is contaminated with petroleum-based agents, these must be removed effectively. The surface should be cleaned mechanically, dust, tarnish, any loose pieces and layers, sharp protruding edges and impurities that worsen adhesion should be removed. If there are cavities in the substrate (honeycombing, gravel pockets and other unevenness), it should be repaired, filled and levelled. If they are less than 5 mm in size, (scratch) filling should be carried out; for larger cavities, a suitable levelling mortar should be used. 
NEXLER WM can be used on a dry or slightly damp substrate. A damp substrate prolongs the setting time. 
NEXLER WM can be applied to existing coatings of dispersion bituminous masses. Prime the prepared substrate with a NEXLER BITFLEX Primer solution. 

Filling (scratch) coating: Apply the compound NEXLER WM to the primed substrate (NEXLER BITFLEX Primer) with the smooth side of a trowel and trowel it in the affected areas. Filling putty is not regarded as a coating waterproofing layer.

Edges and corners: The exterior right angles should be chamfered (bevelled), while the interior angles should be properly rounded by making facets. On mineral substrates, a facet can be made of mineral mortar e.g. NEXLER RENOBUD R 103 (radius 4 - 5 cm) or PMBC (KMB) compound e.g. NEXLER WM (radius 2 cm). On bituminous substrates make a facet of PMBC (KMB) compound. A cat's tongue trowel is best suited for creating facets.

Walls made of small-gauge elements in buildings with a basements: On jointed masonry (e.g. concrete blocks), a levelling plaster should be applied. Prime the prepared substrate with a NEXLER BITFLEX Primer solution.

Check the production date on the packaging before use. The product should not be incorporated beyond its shelf life. The product should not be objectionable (e.g. lumps, discolouration) after opening. After mixing, the compound should be homogeneous and free of lumps and clumps resulting from under-mixing. Do not use a product that bears signs of frostbite. The correct consistency of the product is not dry or rubbery. When properly mixed, the product forms a homogeneous coating when spread over the surface with a tool.

NEXLER WM is a ready-to-use product. Before use, the product should be mixed until a homogeneous mass is obtained.

Thickness of a layer should be checked by material consumption control on a dedicated surface. In addition, it is recommended to measure the thickness of the freshly applied sealing layer with special inspection plates, the measurement point should be filled with putty immediately. 
After it has dried, a properly made coating should be a uniform, clean coating, without flakes and other defects. The coating should adhere closely to the primed substrate.

Waterproofing of underground parts of buildings: Depending on the water and ground conditions and the depth of the foundation of the structure, an appropriate thickness of the insulating layer should be selected. An according layer of NEXLER WM is applied to the properly prepared and primed substrate using a trowel. It is recommended to apply a layer no thicker than 2 mm in one working operation. Each operation should take place after the previous layer has dried. Any service penetrations, expansion joints or other areas exposed to uncontrolled cracks should be reinforced with technical fabric (mesh). Be sure to use cuffs to seal all types of installation penetrations. 
The freshly applied coating must be protected from strong sunlight (e.g. by shading), flooding, rain and negative temperatures. The time for the waterproofing to bind completely, allowing the trench to be backfilled, is approximately 3 days. After binding, the waterproof coating should be protected against mechanical damage associated with backfilling the excavation.

Damp proofing of underground parts of buildings: In the case of damp proofing, NEXLER WM should be applied to the properly prepared and primed substrate in at least two layers. It is recommended that the thickness of the bonded coating be at least 2 mm.

Bonding of thermal insulation boards on foundation walls: Apply thermal insulation boards after the waterproofing layer has fully set (dried). Apply NEXLER WM compound in spots on thermal insulation boards (10 - 12 palm-sized spots per a 0.5 m² board). Then wait approx. 15 minutes (depending on the temperature conditions) before bonding the board. After the wait, the boards should be applied and firmly pressed against the levelled. Start the bonding from the bottom of the excavation. Thermal insulation boards are recommended to be supported on the footing offset and, if this is not possible, to be supported physically during binding. Backfilling the excavation can be done after 3 - 7 days, after full bonding properties of the compound are obtained.

Before use, please read the application details in the product's Technical Data Sheet.