KOMBI KS2 – Joint mortar with trass for grouting clinker tiles and facade tiles

Factory tinted, dry mixture for grouting ceramic façade tiles, clinker façade tiles, gres and stone cladding in the KABE THERM CK EWI system. Intended for use in the range of 6-20 mm (joint depth and width). KOMBI KS2 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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Mixing ratio: 2.5-3.0 litres of water per 25 kg of mortar
Use time:approx. 1.0 hour;
Joint width / depth: 6÷20 mm
Colours: according to the Farby KABE clinker joint colour chart
Temperature of application (air and substrate):5°C-25°C. Note: Temperature lower or higher than optimum may ad- versely affect the properties of the product.
Efficiency:one 25 kg bag of mortar is sufficient to obtain 17.5 litres of ready-to-use mortar.
Average coverage:For façade and clinker tiles, the approximate consumption can be assumed to be about 3 kg/1 m2 with a joint depth of 10 mm and a joint width of 10 mm.
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 rate: NRO (non-fire spreading system)
Reinforcing layer water absorption after 24 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 effl orescence.
• Universal application, joint depth and width from 6 to 20 mm.
• By using a trass, it ensures high vapour permeability, reduces mortar shrinkage and
strongly thickens the mortar structure, limiting capillary transport of mixing water.
• It is frost-resistant, hydrophobic and resistant to
adverse weather conditions after setting.
• Applied in semi-dry consistency.
• 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 mortar. After fixing the ceramic tiles, thoroughly clean the joints from any adhesive mortar residues. In special conditions (high temperature, high absorbency of tiles), in order to increase the adhesion of the joint, the “joint grid” can be slightly moistened with water before grouting.
Product preparation: Mix the contents of the entire 25 kg package with approx. 2.5-3.0 l of water (to maintain a uniform shade of colour, always dose the same amount of water). Mix thoroughly the mortar using a slow-speed mixer until a homogeneous compound with a semi-dry 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 KS2 mortar is applied with a grouting kit. 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. With a joint depth of less than 6 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! After the mortar has initially set, wash the tile surface with a slightly damp sponge, diagonally to the joint grid. Special attention should be paid to ensure that, when cleaning, the surface of the fresh joint is not damaged or the fresh joint is not wetted with excessive amount of water. During the work, general rules of construction practice must be followed.
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. It should be assumed, that the drying period of the joint is 1 day (24 hours) for each 1 mm of thickness. 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: Optimum processing conditions: air, substrate, as well as product temperature should be within 15°C-25°C. Note: Temperature lower or higher than optimum may adversely affect the properties of the product. 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.
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.