Sikalastic-1K is a one-component, crack-bridging, fibre-reinforced mortar based on cement modified with special alkali-resistant polymers. ProTrade Warehouse offers this versatile Sika product for flexible waterproofing and concrete protection at competitive trade prices.
Uses
- 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.
Features
- 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.
Product Information
Composition: Cement modified with alkali resistant polymers, selected aggregates, fine fillers admixtures, additives and fibres.
Packaging: 20 kg bags
Appearance and colour: Light grey
Shelf life: 6 months from date of production
Storage conditions: Store properly in the original packaging, in cool and dry conditions. Protect from water.
Maximum grain size: Dmax: ~0,3 mm
Application Information
Mixing ratio: By brush ~6,0 litres water per 20 kg bag, By trowel ~4,4 litres water per 20 kg bag
Consumption: ~1,2 kg/m²/mm (dependent on substrate roughness)
Layer thickness: Standard applications total 2mm DFT (min 2 layers), Negative pressure/immersed total 3-4mm DFT (min 2 layers), Max 2mm per layer (trowel), Max 1mm per layer (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 to overcoating: Varies with temperature and humidity (refer to datasheet for specific times)
Fresh mortar density: ~1,5 kg/l
Important Considerations
- Sikalastic-1K shall not be smoothed using a float or trowel.
- Protect from rain for at least 24–48 h after application.
- Avoid direct contact with chlorinated water i.e. in swimming pools, by using suitable protection.
- Avoid application in direct sun light, when rain is imminent or in strong winds.
- Setting time can be influenced by high relative humidity, particularly in closed rooms or basements. The use of adequate ventilation is recommended.
- Before contact with drinking water, ensure the Sikalastic-1K is completely hardened and wash carefully to remove dust, loose material or stagnant water, according to local regulations.
- Sikalastic-1K is permeable to water vapour and does not form a vapour barrier for resin-based systems not permeable to gas.
- If a solvent-based paint is to be applied, carry out preliminary testing.
- When used in contact with drinking water, ensure compliance with local regulations.
Application Instructions
SUBSTRATE QUALITY / PRE-TREATMENT
Substrates must be structurally sound, clean, dry and free of all contaminants such as dirt, oil, grease, cement laitance, coatings and other surface treatments etc. Clean surfaces by blast cleaning, high-pressure water-jetting (400 bar), wire-brushing, grinding etc., in order to remove all previous coatings, any traces of grease, rust, release agents, cement laitance and any other material which could reduce adhesion. All dust deposits from this preparation must also be removed i.e. by vacuum. Repair concrete substrates, if necessary, with an appropriate cementitious mortar from the SikaTop® or Sika MonoTop® range of repair materials. The substrate shall be adequately dampened before application. The surface shall not be moist to the touch and shall not be the dark matte (saturated surface dry) appearance.
MIXING
Sikalastic-1K can be mixed with a low speed (~ 500 r/min) hand drill mixer, adding the right quantity of water according to the respective application. Once a homogeneous mix is obtained, continue mixing for 3–4 min. The mortar must be homogeneous and lump free. Do not add any additional water or other ingredients. Each bag must be entirely mixed, to avoid faulty particle size distribution of aggregates contained in the powder component.
APPLICATION
Special Requirements: All connections between the substrate and pipe entries, plant and equipment, light switches etc., must be sealed and watertight. Joints in concrete, pipes or anywhere else in the structure must also be sealed and made watertight. Use coved details at the floor/wall junctions.
Apply Sikalastic-1K by:
- spatula/roller: Exerting good and even pressure onto the substrate;
- brush: In 2 directions (diagonally opposite / crosswise);
- mechanical spray: Refer to Sika Technical Service for details
The optimum waterproofing performance is obtained by applying Sikalastic-1K by trowel in at least 2 layers, to a total thickness of at least 3 mm. Application by brush must be undertaken with the maximum attention to uniformly covering the whole surface. The maximum recommended thickness for these methods of application is 1 mm per layer. In these situations, the application of min. 2–3 layers is required (subsequent layers must be applied crosswise). Wait until the first layer is dry before applying subsequent layers. The application shall cover the whole surface of the substrate in a uniform thickness. Sikalastic-1K cannot be smoothed using float or sponge trowel. It is possible to smooth the surface as soon as the curing of the product is complete by light abrasion techniques.
JOINTS
At joints or other critical movement areas (for example junctions with vertical surfaces), the waterproofing may be reinforced by Schonox ST Tape. It must be applied directly on the fresh first layer and then covered by the second layer of Sikalastic-1K. Please Note Schonox ST Tape is not suitable for swimming pools; for immersed and tanking applications the Sikadur Combiflex® SG System is recommended, contact Sika Technical Services for additional information.
TILING
Ceramic and vitreous tiles may be installed on Sikalastic ®-1K using a polymer modified cement based tile adhesive in the Sika® range. All joints and gaps must be sealed.
CLEANING OF EQUIPMENT
Tools should be thoroughly cleaned with water before the material has set. Hardened mortar can only be removed mechanically.
Order Sikalastic-1K Flexible Waterproofing Mortar from ProTrade Warehouse for reliable concrete protection and waterproofing. Benefit from our trade prices and fast Australia-wide delivery, with convenient pickup options available.
