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Sikalastic 1K 10kg Pail

Sikalastic 1K

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One-component cementitious mortar, fibre-reinforced for flexible waterproofing and concrete protection

Sikalastic®-1K is a one-component, crack-bridging, fibre-reinforced mortar, based on cement modified with special alkali-resistant polymers. Sikalastic®-1K is suitable for application by brush, spray or trowel.


  • 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


  • 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