KOMBI S

SUBSTRATE PREPARATION: Apply to a sound/stable and clean substrate (without cracks and delaminations), degreased, even and dry, and free of biological contamination or chemical efflorescence. In case of algae/fungi growth, the substrate should be cleaned mechanically and then wash with water and disinfect with ALGIZID. The substrate must be protected against capillary action, moisture intake and precipitation. Any loose layers not bound to the substrate (i.e. loose render or flaked coatings) should be removed. Old and/or dirty substrates should be washed off and degreased with water and CLEANFORCE cleaning agent. If any substrate unevenness exceeds 1 cm, use a levelling compound first. Absorbent substrates should be primed with BUDOGRUNT ZG before levelling compound application. Before fixing EPS boards to uncertain substrates, it is necessary to perform an adhesion test. The test involves fixing a few (8-10) EPS samples of 10 x 10 cm dimensions in various places of the facade and then tearing them off after 3 days. The substrate load-bearing capacity is sufficient when the tearing happens in the EPS layer. If the whole sample including adhesive and substrate layer is torn off, then it is necessary to remove the poorly bound layer from the substrate and prime it with BUDOGRUNT ZG. When the primer dries, the adhesion test must be performed again. If the test gives a negative result, it is necessary to consider additional mechanical fixing or special substrate preparation.
PRODUCT PREPARATION: Gradually pour the contents of the packaging into a container with a measured amount of clean and cold water (approx. 6 liters) while continuously mixing the mass (with a low-speed mixer fitted with a basket stirrer) until homogeneous mixture is obtained. After waiting for 5 minutes and remixing, the adhesive is ready for use. After adding water, the adhesive must be used up within approx. 2 hours (at an ambient temperature of +20°C).
FIXING OF EPS BOARDS: Notch trowel method may be used to fix EPS to even substrates. Put some cement adhesive on the slab with trowel and using the edge of it, rub evenly all over to create a thin coat. While being rub, the
adhesive should be pressed to the surface of the slab. Subsequently, an additional amount of adhesive should be rub on the slab by using a notched trowel (minimum notch size: 10 x 10 mm). Once the adhesive is applied, the slab must be immediately put onto the wall in its appropriate place and pressed to flush it with the neighbouring boards. Boards must be tightly fitted next to each other using staggered method. Excess adhesive coming out from EPS board joints must be removed so that no adhesive is left on the slab edges. Properly applied adhesive should cover the whole slab surface, and its thickness after attaching the slab should not exceed 1 cm. After allowing sufficient time to cure (at least 48 hours), the boards should be fixed by means of applicable mechanical fixings pursuant to the thermal insulation project. In order to get an even surface of all the fitted boards, the whole surface of the EPS board should be sanded with a suitable thick gauge of sandpaper. When fixing EPS boards on uneven substrates, the cement adhesive should be applied on boards by means of the ribbon and dab method. The ribbon should be 3÷6 cm wide, and should be applied onto the perimeter of the slab. In addition, 6 to 8 dabs of adhesive (approx. 10÷12 cm diameter) should be evenly placed on the remaining part of the slab. The ribbon must be formed in a prism shape. To do so, rub it with a trowel set at an angle of 45° towards the slab surface. Once the adhesive is applied, the slab must be immediately put onto the wall in its appropriate place and pressed to flush it with the neighbouring boards. Boards must be tightly fitted next to each other using staggered method. Excess adhesive coming out from EPS board joints must be removed so that no mortar is left along the slab edges. Properly applied adhesive must cover not less than 40% of the slab surface, and the adhesive layer thickness should not exceed 1 cm. After sufficient curing time (at least 48 hours), the boards should be fixed by means of applicable mechanical fixings pursuant to the thermal insulation project. In order to get an even surface of all the fitted boards, the whole surface of the EPS board should be sanded with a suitable thick gauge of sandpaper.
DRYING: It is assumed that the mortar initial setting period is min. 3 days (typical drying conditions 20°C, 65% RH). Note: Low temperature and high relative humidity essentially prolong mortar drying time. For the purposes of performing reinforcing coat it is necessary to apply KOMBI base coat.
USEFUL HINTS: To be applied on dry days at temperatures between 5-25°C. Avoid working on surfaces directly exposed to sun and in strong winds. Note: The product is alkaline, therefore, it is necessary to protect eyes and skin. Safety
clothing (PPE) must be worn while carrying out any installation work. In case of contact with eyes, immediately rinse them thoroughly with plenty of water. If irritation develops, seek medical assistance.