One-component cementitious mortar, fibre-reinforced for flexible waterproofing and concrete protection Sikalastic-1K GB is a one-component, crack-bridging, fibre-reinforced mortar, based on cement modified with special alkali-resistant polymers. Sikalastic-1K GB is suitable for application by brush or trowel. - One-component product, only water needs to be added
- Adjustable consistency, easy to apply by brush or trowel
- Good sag resistance and easy to apply, even on vertical surfaces
- Good crack-bridging ability
- Very good adhesion on many substrates including concrete, cement mortars, stone, masonry
- Can be applied on damp substrates
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Usage - Flexible waterproofing and protection of concrete structures including tanks, basins, pipes etc.
- Waterproofing of bathrooms, showers, terraces, balconies,swimming pools before the application of ceramic tiles bonded with adhesives
- Waterproofing of external wall surfaces to be backfilled in ground
- Inside waterproofing of negative water pressure of walls and floors in basements
- Flexible protection coating for reinforced concrete structures against the effects of freeze-thaw and carbon dioxide attack to improve durability
Advantages - One-component product, only water needs to be added
- Adjustable consistency, easy to apply by brush or trowel
- Good sag resistance and easy to apply, even on vertical surfaces
- Good crack-bridging ability
- Very good adhesion on many substrates including concrete, cement mortars, stone, masonry
- Can be applied on damp substrates
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Technical Information Crack Bridging Ability | > 0,50 mm (Class A 3, +23 °C) 1 | (EN 1062-7) | | ≥ 0,75 mm (+23 °C) 2 | (EN 14891 A.8.2) | | ≥ 0,75 mm (–5 °C) 2 | (EN 14891 A.8.3) |
1 Value obtained with a total layer thickness of 3 mm in two layers with 22 % water
2 Value obtained with a total consumption of 3.6 kg/m2 in two layers with 30 % water
Tensile adhesion strength Value obtained with a total layer thickness of 3 mm in two layers with 22 % water | | Test Method | Requirement | | Initial tensile adhesion strength | A.6.2 | ≥ 0,5 N/mm2 | | Tensile adhesion strength after water contact | A.6.3 | ≥ 0,5 N/mm2 | | Tensile adhesion strength after heat aging | A.6.5 | ≥ 0,5 N/mm2 | | Tensile adhesion strength after freeze-thaw cycles | A.6.6 | ≥ 0,5 N/mm2 | | Tensile adhesion strength after contact with lime water | A.6.9 | ≥ 0,5 N/mm2 | | Tensile adhesion strength after contact with chlorinated water | A.6.7 | ≥ 0,5 N/mm2 |
Values obtained with a total consumption of 3.6 kg/m2 in two layers with 30 % water
Capillary Absorption | ~0,02 kg/m2·h0.5 | (EN 1062-3) |
Value obtained with a total layer thickness of 3 mm in two layers with 22 % water
Water Penetration under Pressure | No penetration after 72h at 5.0 bar 1 | (EN 12390-8)2 | | No penetration after 7 days at 1.5 bar 3 | (EN 14891 A.7) |
1 Value obtained with a total layer thickness of 3 mm in two layers with 22 % water
2 Modified
3 Value obtained with a total consumption of 3.6 kg/m2 in two layers with 30 % water
Water Penetration under Negative Pressure | No penetration after 72h at 2.5 bar | (UNI 8298/8) |
Value obtained with a total layer thickness of 3 mm in two layers with 22% water
Permeability to Water Vapour | Class I (permeable) SD < 5 m | (EN ISO 7783-1) |
Value obtained with a total layer thickness of 3 mm in two layers with 22 % water
Permeability to CO2 Value obtained with a total layer thickness of 3 mm in two layers with 22 % water
Freeze Thaw De-Icing Salt Resistance Value obtained with a total layer thickness of 3 mm in two layers with 22 % water
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Application Information Mixing Ratio | Application Method | Water Dosage | | By brush | ~6,0 litres water per 20 kg bag | | By trowel | ~4,4 litres water per 20 kg bag |
Fresh mortar density ~1,5 kg/l Layer Thickness 3 mm with constant thickness, applied in minimum 2 layers.
Maximum recommended thickness per layer is 2 mm when applied by trowel and 1 mm when applied by brush Ambient Air Temperature 5 °C min. / 35 °C max. Substrate Temperature 5 °C min. / 35 °C max. Pot Life ~30 min at +20 °C Waiting Time / Overcoating Sikalastic-1K GB must be completely hardened before over-coating or water contact.
Guide for waiting times at the following temperatures: | | +20 °C | +10 °C | | Horizontal covering by tiles | ~2 days | ~7 days | | Vertical covering by tiles | ~2 days | ~3 days | | Water emulsion coating | ~2 days | ~3 days | | Immersion in water | ~2 days | ~7 days | | Contact with drinkable water | ~15 days | ~15 days |
Times will vary due to ambient and substrate humidity. |
The above design is only a sample of the options available, for reference purposes only. Our policy of continuous improvement may result in a change of specifications without notice. If any discrepencies might be between the data sheet values and standards, we reserve the rights to make technical changes. Our company will not be held responsible, as all or any of pictures, drawings, weights and dimensions details or other elements in this document are only indicative and must not be considered contractual. Contact our sales team for other specifications or custom made products.
Contact our sales team for other specifications or custom made products.
