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  • Waterproof protection of concrete structures including tanks, basins, pipes, etc.
  • Waterproofing external wall surfaces to be backfilled in the ground.
  • Internal waterproofing of walls and floors, in basements for example.
  • Waterproofing of terraces and balconies over concrete or prepared existing tiles.
  • General waterproofing of concrete surfaces.


A single component, flexible, fibre-reinforced mortar, based on cement modified with special alkali-resistant polymers. It also contains fine fillers, selected graded aggregates, plus special waterproofing additives to produce a flexible mortar that is ideal for waterproofing surfaces subject to flexural strain.

Sikalastic®-1K is suitable for application by brush or trowel.


  • Can be applied on damp substrates.
  • Easy to apply by brush or trowel.
  • Good sag resistance and easy to apply, even on vertical surfaces.
  • Flexible crack-bridging properties.
  • Very good adhesion on many substrates including concrete, cement mortars, stone, ceramics, bricks and timber.
  • Mixing ratio can be adjusted in order to obtain the consistency and workability desired for the intended application.

General information






Pr_20_31_53_14 Cementitious tanking mortarsPrimary


J10/110 Proprietary mortar

Product range


Environmental information

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

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