Description
High performance and paintable professional waterproofing elastic sealer for concrete facades, factories and SATE.
Preparation
For optimal adhesion and for critical applications where high performance is required, such as sealants in high-rise constructions, joints with high bond stress or extreme exposure to the elements or immersion in water, cleaning products and primers should be used on the substrates. Non-porous substrates such as glazed tiles, powder-coated metals, aluminum, anodized aluminum, stainless steel and galvanized steel must be cleaned with SIKA Aktivator-205. Before sealing, the solvent must be allowed to evaporate (15 min - 6 h). Metals such as copper, brass, titanium-zinc must be cleaned with SIKA Aktivator-205. After a drying time of more than 15 min, apply SIKA Primer-3N as an adhesion promoter with a brush. Wait between 15 min and 8 h before sealing. On porous substrates such as concrete, coatings, cements, mortars or bricks, they have to be primed with SIKA Primer-3N with a brush. Before sealing, allow the solvent to evaporate (30 min - 8 h).
Use
Suitable for connecting and moving joints in commercial buildings.
Application
Supplied ready for use. After preparing the joint and the support, place the joint backing at the appropriate depth and, if necessary, apply the corresponding primer. Insert the cartridge or sausage into the gun and extrude the product into the joint ensuring total contact with it. Fill the joint, avoiding entrapment of air. SikaHyflex-250 Façades must be firmly smoothed against the joint lips to ensure full contact and adhesion. In order to achieve a good aesthetic finish, it is recommended to delimit the joint with a masking tape. This will be removed before the putty begins to polymerize. It is recommended to use water and neutral soap as a joint smoothing liquid to obtain an optimal sealing surface.
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