KOMBI KS1 – Joint mortar with a trass for grouting facade bricks, clinker bricks and clinker tiles

Factory tinted, dry mixture for grouting hand-formed clinker façade tiles, as well as for ceramic façade tiles and stone cladding in the KABE THERM CK EWI system. The required joint width ranges from 6 to 20 mm. The KOMBI KS1 joint mortar is a product based on selected aggregates, high-quality cements, volcanic tuff (trass) and additives, ready to use after adding an appropriate amount of mixing water. The product is a component of an EPS-based EWI system, made
in the technology of the external thermal insulation composite system (ETICS).

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Composition: dry mixture of white cement binder, aggregates and polymer modifying additives, reinforced with cellulose and polypropylene fibres;
Average consumption: approx. 6 kg/1 m2, depending on the size of the tiles. Consumption should be checked under specific conditions, as it depends on the depth and width of the joint.
Mixing ratio: 3.0-3.5 litres of water per 25 kg of mortar
Time of use:approx. 1.0 hour
Joint width / depth: 6-20 mm
Colours: according to the Farby KABE joint colour chart;
Grain size: up to 0.5mm;
Temperature of application (air and substrate):from +5oC to +25oC. Note: Temperature lower or higher than optimum may adversely affect the properties of the product.
Efficiency:one 25 kg bag of mortar is sufficient to obtain 16 litres of ready-to-use mortar
Packaging: 25 kg bags, reinforced paper bags, with a double polyurethane film liner. 48 bags per pallet.
Storage: 12 months – recommended use within 6 months.
Storage conditions:Protect against moisture and store in a dry place on pallets in original packaging. Opened packages should be tightly closed.
Fire spread rating: NRO (non-fire spreading system)
Reinforcing layer water absorption after 24 hours:hours: < 0.5 [kg/m2]
Surface layer water absorption after 24 hours:< 0.5 [kg/m2]
Surface layer impact resistance:cat. I;
Diffusion resistance of the surface layer: Sd≤5.7 [m];
Frost resistance of the top layer: no damage;
Top layer adhesion to EPS:– in laboratory conditions: ≥ 0.08 [MPa] – after 2 days of immersion in water and 2 hours of drying: ≥ 0.08 [MPa] – after ageing: ≥ 0.08 [MPa] – after cycles of frost resistance: ≥ 0.08 [MPa]
Maximum load: 260 N;
Maximum deflection: 8.4 mm;

• Mineral mortar with trass that minimises the risk of efflorescence.
• By using a trass, it ensures high vapour permeability of the wall,
reduces mortar shrinkage during setting and strongly thickens the
mortar structure, limiting capillary transport of mixing water.
• It is hydrophobic and resistant to adverse atmospheric conditions after setting.
• High compressive strength >15 N/mm2.
• Available in several colours according to the colour chart.

Substrate: The substrate should be clean, free from dust and anti-adhesive oil. Remove all loose, unbound parts and remnants of adhesive. Grouting can be started after approx. 14 days after fixing the tiles or claddings. Before grouting, the substrate should be slightly moistened with water using a sprinkler to increase adhesion.
Product preparation: Mix the contents of the entire 25 kg package with approx. 3.0-3.5 l of water (to maintain a uniform shade of colour, always dose the same amount of water). Mix thoroughly the KOMBI KS1 mortar using a slow-speed mixer or a concrete mixer until a homogeneous compound with a moist consistency (so-called “wet soil”) is obtained. After mixing, wait 5 minutes and mix again. A properly prepared mortar, when squeezed in the hand and opened, forms a compact lump and leaves no wet trace. The prepared portion of the mortar should be used within one hour. Note: It is forbidden to add water to the previously prepared mortar during works, because it may change the colour.
Grouting: The KOMBI KS1 mortar is applied with a grouting kit from top to bottom. The mortar should be applied using the “wet on wet” method, at the same time compacting the mortar structure by pressing a stainless steel “joint” trowel or using other tools. The width and depth of the joint should range from 6 mm to 20 mm. It is recommended to make a full (flush) or concave (semicircular) joint. With a joint depth of less than 10 mm chipping may occur. All kinds of dirt should be removed only with a dry, soft brush. Note: The use of water for cleaning fresh mortar is unacceptable!
Drying: Fresh mortar should be protected against adverse weather conditions (frost, gusty winds, direct sunlight and rain) for approx. 7 days. For this purpose, the jointed surfaces should be covered with a tarpaulin, foil or mats. Adequate ventilation should be provided around the jointed surface. Optimum processing conditions: air, substrate, as well as product temperature should be within 5°C-25°C. Note: Temperature lower or higher than optimum may adversely affect the properties of the product. The setting and drying time may be longer due to low temperatures and high relative humidity. After the joints are completely set and dry, it is recommended to use the SILIKON B siloxane impregnation over the entire surface of the wall (joints and tiles/bricks).
Useful hints: The mortar is mass-coloured and available in colours according to the Farby KABE colour chart. Because of the repeatability of colour, bags from the same production batch should be used (batch number and mortar colour on the print on the side of the bag). Apart from clean water, no other substances may be added. Before starting grouting, bricks should be cleaned of production residues and dust. (this is especially important for hand-formed tiles and with a rustic appearance). Loose particles present on the surface of the tiles will reduce the bond and strength. Tiles cannot be wet or frozen.
Safety hints: It is a dusty product in dry conditions, after adding water or with moisture its pH is strongly alkaline. Therefore, it is necessary to protect eyes and skin. Wear standard skin, eye and respiratory protection. If the mortar comes into contact with skin, wash the contact area thoroughly with plenty of water. In case of eye contact with mortar, rinse the eye thoroughly with water and seek immediate medical advice.