WL

The surface must be properly prepared before applying NEXLER WL. The substrate intended for product application must be bound, seasoned, loadbearing, not frozen. If the substrate is contaminated with petroleum-based agents, these must be removed effectively. The substrate 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. Partitions made of small size elements should have an equal face, a full joint. The substrate on which the product will be used must be continuous. 
Before applying the waterproofing material, minerals substrates (concrete, plasters) should be primed with NEXLER WL diluted with water in a 1 : 1 ratio. For materials with reduced absorption, hydrophobized, (e.g. "waterproof concrete”), use NEXLER BITFLEX Primer for priming. 

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 BITFLEX 1KP (radius 2 cm). On bituminous substrates make a facet of PMBC (KMB) compound. A cat's tongue trowel is best suited for creating facets.

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, fibres, discolouration) after opening. After mixing, the compound should be homogennemu 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.

Substrate priming: Before use, NEXLER WL should be diluted with water in 1 : 1 ratio (water : NEXLER WL).

Making damp-proof coatings and bonding insulation: Stir thoroughly before use, and repeat mixing from time to time during application.

When fresh, check the consumption of the material per unit and/or dedicated area on an ongoing basis. A properly primed surface, after the solution has dried, should have a uniform colour, without streaks and discoloration. 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.

Substrate priming: NEXLER WL, diluted with water, should be applied with of a brush or roofing brush to a properly prepared surface.

Bonding of thermal insulation boards on foundation walls: Apply thermal insulation boards after the waterproofing layer has fully set (dried). Hydrophobized insulation boards should be sanded before bonding. Apply NEXLER WL in spots on thermal insulation boards (8 - 10 palm-sized spots). Then wait approx. 15 - 20 minutes before bonding the board. A sign that the waiting time was too long is a change in the colour of the compound from brown to black. After the wait, the boards should be applied and firmly pressed against the levelled substrate. 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 during binding. Backfilling the excavation can be done after 3 - 7 days, after full bonding properties of the compound are obtained.

Damp proofing of underground parts of buildings: Apply NEXLER WL to a previously primed substrate (see above) without diluting with a brush or a trowel, so that the dry residue is at least 1 mm thick. Each operation should take place after the previous layer has dried. Works should not be carried out during precipitation and strong sunlight. The time for the waterproofing to bind completely, allowing the trench to be backfilled, is approximately 3 days.

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