For bonding styrofoam thermal insulation boards to solid facade surfaces, embedding reinforcement mesh and leveling the entire facade surface, as well as for bonding mineral wool boards. BK-StirolFix WDVS is used as an adhesive for bonding thermal insulation boards within the Bekatherm Standard, that is, for bonding MW boards within the Bekatherm Prestige thermal insulation system.
PREPARATION AND APPLICATION
The substrate to which the adhesive is applied must be solid, clean, durable, free from efflorescence, oil residues or paint. The preparation is performed by adding the powder in about 26-28% of water (6.5-7 l of water for 25 kg of product) until complete homogenization. Leave the mass to rest for about 10 minutes and then stir again to obtain an adhesive of appropriate density. The prepared adhesive is applied to thermal insulation boards (along the entire perimeter of the board and dotted in the middle in the form of so-called doughs of adhesive, with approximate diameter of 10cm), and then the boards are bonded on substrate by pressing. When reinforcing, the adhesive is applied with a serrated steel trowel (tooth size 8-10mm) on dedustedstyrofoam surface, and then the reinforced mesh is pressed into such adhesive from down upwards (min. 10 cm of overlap between the mesh strips). After drying, the entire surface is leveled with a new layer of adhesive, so that the total thickness of the final layer of adhesive is 4-5 mm. The adhesive should be protected from premature drying and freezing. When bonding MW boards, the entire surface of the board must be coated with a thin layer of adhesive. The adhesive is then applied over the entire perimeter of the MW board with the addition of three application points in the middle, in the form of so-called adhesive doughs, approximately 15 cm in diameter. In further work, follow the same rules mentioned in the section on EPS boards bonding. See product datasheet for more detailed instructions.
Optimal weather conditions: Substrate and air temperatures from +5°C to +30°C. Possible to embed reinforcement mesh: after min. 48 hours. Possible to apply finishing coats: after min. 7 days.
APPROXIMATE CONSUMPTION OF MATERIALS
about 5-6,5 kg/m² for bonding and about 5-6 kg/m² for leveling, depending on the quality of the substrate, the type of thermal insulation material used, etc.
SHELF LIFE AND STORAGE
12 months in original packaging in dry room on pallets.