Description
Sika SikaLastic-1K Waterproofing Mortar
– Available in 20kg Bags
Sikalastic®-1K is a one-component, crack-bridging, fibre-reinforced mortar, based on cement which is modified with special alkali-resistant polymers. Sikalastic®-1K is suitable for application by brush, spray or trowel. It provides Flexible waterproofing and protection of concrete structures including tanks, basins and pipes.
It is also recommended for the waterproofing of bathrooms, showers, terraces, balconies and swimming pools before the application of ceramic tiles bonded with adhesives
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 back-filled 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
- 20kg Bags
Appearance and Colour
- Light Grey Powder
Shelf Life
- 6 months from date of production
Storage Conditions
- Store properly in the original packaging, in cool and dry conditions. Protect
from water.
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
- This depends on the substrate roughness; as a guide: ~1,2 kg/m2/mm
Layer Thickness
- For standard applications a total 2mm DFT, applied in minimum 2 layers.
- For negative pressure/immersed appications a total 3-4mm DFT, 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 Until Overcoating
NOTE: Sikalastic®-1K must be completely hardened before over-coating or water contact.
- Horizontal covering by tiles. ~2 days @ 20ºC / ~7 days @ 10ºC
- Vertical covering by Tiles. ~2 days @ 20ºC / ~3 days @ 10ºC
- Water emulsion coating. ~2 days @ 20ºC / ~3 days @ 10ºC
- Immersion in water. ~2 days @ 20ºC / ~7 days @ 10ºC
- Contact with drinkable water. ~15 days @ 20ºC / ~15 days @ 10ºC
- Times will vary due to ambient and substrate humidity.
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 respecting the
suggested waiting times 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 on Sikalastic®-1K, carry out preliminary testing in order to
ensure the solvents do not attack and damage the waterproofing layer. - When used in contact with drinking water, ensure Sikalastic®-1K and all associated Sika® products
comply with the local regulations for drinking water contact.
