Surface preparation
When preparing the substrate and carrying out the work, the requirements of DSTU-N B A.3.1-23:2013 and DSTU-N B V.2.6-212:2016 must be observed. The surface must be clean, dry, load-bearing, and prepared in accordance with the specified requirements. Contaminants and substances that reduce adhesion of the waterproofing to the substrate (oil and grease stains, lubricants, bituminous mastics, previous unstable coatings, etc.), as well as weak areas, must be removed and repaired. Cleaning of large surface areas is recommended using high-pressure equipment — water jetting or sandblasting.
All external sharp corners must be chamfered, and internal corners rounded with a radius of at least 4 cm using repair mortar of group RM2. When waterproofing brick masonry, joints must be filled with repair mortar flush with the brick surface. After preparation, the surface must be even, rough, and slightly moistened.
Curing time for monolithic concrete substrates must be at least 90 days; for brick masonry and cement-sand plaster substrates — at least 28 days. The waterproofing compound “2K TopFlex” may only be applied to structural elements that are not subject to deformation during service. The substrate strength for waterproofing application must be at least 16 MPa (grade M150; class B12.5).
Material preparation
Pour “Component B” from the canister into a clean container of appropriate volume and gradually add “Component A” from the bag while mixing with a trowel. Then mix thoroughly using a low-speed mixer until a homogeneous, lump-free consistency is achieved. Allow the mixture to stand for 3–5 minutes, then remix with a low-speed mixer.
When using mechanized spraying equipment connected to mortar mixers, ensure the mixture is homogeneous and free of lumps before feeding it into the pump hopper.
Attention! It is strictly forbidden to add water to the mixture during or after preparation.
Pot life of the ready-mixed “2K TopFlex” is at least 60 minutes.
Application
Manual application
“2K TopFlex” is applied in a continuous layer in one direction onto the prepared, slightly moistened surface using a paint roller or a short-pile brush. The thickness of the first layer should be approximately 1.0 mm. In areas subject to increased loads (terraces, balconies, swimming pools), it is recommended to embed alkali-resistant reinforcing fiberglass mesh ThermoELF “Gewebe 160” with a density of 160 g/m² into the first, still fresh waterproofing layer and smooth it using a flat trowel. Six hours after applying the first layer, apply the second waterproofing layer in a perpendicular direction using a flat trowel. The total thickness of the waterproofing system must be at least 2 mm.
Spray application
The material is evenly applied using a sprayer with a suitable nozzle, with a minimum thickness of 2 mm per layer. If a thicker waterproofing layer is required, allow a technological break of 6 hours after the first application before applying the second layer. In areas exposed to high loads, it is recommended to embed alkali-resistant reinforcing fiberglass mesh ThermoELF “Gewebe 160” (160 g/m²) into the first, still fresh waterproofing layer and smooth it with a flat trowel. If necessary, the mesh should be covered with an additional waterproofing layer after a 6-hour technological break.
