BI MORTAR SL waterproofing slab mortars


Reinforce and waterproof horizontal structures in a single application

BI MORTAR SL is a shrinkage controlled waterproofing self-levelling mortar to waterproof and smooth, at the same time, horizontal structures. Particularly suited for extending and re-adapting the quality of underground rooms. Also suitable in the presence of negative hydrostatic pressure.

Where to use it

  • Horizontal surfaces, to create a waterproof concrete repair mortar with a maximum final slope of 2%
  • Elevator pit surfaces, lightwells, tanks, channels and pools to create a waterproof concrete repair mortar with a slope
  • Waterproofing of foundations, even in conditions of negative hydraulic pressure
  • Waterproofing of the horizontal surface in underground structures, also in the case of reduced available thicknesses or uneven surfaces


  • It simplifies and reduces the application phases by featuring ”two products in one”, as it reinforces and waterproofs in a single application
  • Also applicable on uneven surfaces
  • It can be mixed with fine gravel when applying high thick casting
  • Sulphate resistant
  • Excellent resistance to negative pressure
  • Suitable for both indoor and outdoor application

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