Osmotic waterproofing mortar, with active crystalline agents

Code: OSM.0263

Components: 1

Appearance: Powder

Fiber-reinforced monocomponent cement mortar, based on hydraulic binders, superprogoline fillers, selected fine aggregates and crystallizing reagent agents, which favor the penetration of the compound into the support. Ideal for low-thickness protective coatings (4 to 10 mm), with high counterweight adhesion. The specific formulation makes this product ideal for coatings in aggressive environments in contact with chlorides and sulphates (sewage systems).

Linee di appartenenza

Certification obtained and Standards

Specification for Mortar for Masonry - General purpose rendering/plastering mortar (GP)

EN 998-1

Specification for Mortar for Masonry - General purpose rendering/plastering mortar (GP)

Products and systems for the protection and repair of concrete structures - Structural and non-structural repair (R4)

EN 1504-3

Products and systems for the protection and repair of concrete structures - Structural and non-structural repair (R4)

D.M. 06/04/2004, n. 174

General characteristics


Shelf-life: 12 months


Maximum diameter of aggregate: 2.0 mm


Mix with water: 16-18 %




Pot-life: 45 min


Min. recommended thickness: 4 mm


Density: 1.9 kg/dm³


Max. recommended thickness: 20 mm


Suitable for contact with drinking water

Technical specifications

Adhesion to substrate

2.2 N/mm²

Chloride content

<0.01 %

Darcy impermeability

<1x10⁻¹⁰ cm/s

Resistance to severe chemical attacks

classe II _

Thermal compatibility

2.18 MPa

Compressive strength after 28 days

> 50 N/mm²

Bonding force

2.2 N/mm²

Static elastic modulus

> 21000 N/mm²

Resistant to sulphates

4.5 _

Water penetration after capillary absorption

2.2 mm

Skid resistance

65.0 _

Capillary absorption

0.17 kg•h^0.5/m²

Flexural strength

> 6 N/mm²

Resistant to chemical agents

Water penetration depth

40 mm

Available colours

- Gray

Packaging and dimensions

- Bag 25 kg


OSMOCEM SCK has a rapid hardening even at low temperatures (even close to 0 ° C), excellent resistance to freeze-thaw cycles and a remarkable resistance to hydrostatic pressure, even in negative phase (counter-thrust). Thanks to the particular crystallising agent of which it is added, it also has a strong tendency to self-healing in case of cracks, as well as a very high cohesion to the support due to its penetrating characteristic (osmotic crystallising).


Approximately 1.7 kg/m² of OSMOCEM SCK for each millimetre of thickness to be made.

Use fields

Concerning concrete counter-ground works, underground rooms and constructions, tunnels, hydraulic and infrastructural works and sewer systems, the OSMOCEM SCK compound is ideal for low-speed regularisations, shavings and coatings, provided they are sufficiently porous and absorbent and free from any waterproofing and / or water-repellent surface treatment, whether chemical (siloxanes, epoxies, polyurethanes, etc.) or natural (wax-up). Resistant to both positive and negative thrust impermeabilizations (counter-thrust).

Preparation of supports

The surfaces that are the subject of the operation should be healthy, compact and clean. Carefully remove dirt and any pollutant by removing the layers that are not tight, labile and not adequately resistant. Application surfaces should be abundantly and homogeneously moistened before application, while avoiding water stagnation on the surface.

Use method

To prepare the prepared mortar, add about 2/3 of the expected dough water to the mixer, gradually add the contents of the OSMOCEM SCK bag and finally the remaining water; Extend the mixing until a homogeneous, bulk-free mix is ​​obtained. When mixing is completed, wait a few minutes before applying. It can be applied either manually (trowel and broom) or by specific pumping equipment, with spritz-concrete, even sprayed technique. In the case of tunnel and tunnel impermeabilizations, OSMOCEM SCK mortar can be used as a waterproofing layer between two containment spritz-concrete.

Application methods

- Brick trowel

- Finishing trowel

- Shotcrete machine

- Spatula

- Low pressure airless nebulizer

Tool cleaning

- Water

Permitted supports

- Concrete

- Prefabricated concrete

- Bricks

- Mixed walls (bricks and stones)

- Brickworks

- Stone walls

- Rock walls

Warnings, precautions and Ecology

Do not apply in case of direct exposure to sunlight and excessive direct ventilation. Protect the fresh (applied) mortar during hardening/curing period from excessive and rapid loss of humidity and from sudden temperature change.
Do not apply on little or non-porous substrates or previously coated with water-repellent treatments in general, if not after appropriate roughening by bush hammers, sanders and equipment suitable for preparatory treatments of substrates, or after appropriate treatment with suitable polymeric primers.


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