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Fiber reinforced floor levelling & waterproofing mortar




(Measurement conditions 23°C and 50% RH)

Form - Color

Cementitious powder - Grey

Toxic/flammable (per ΕΝ 88/379)


Maximum grain diameter 0,6 mm

Bulk density of dry mortar

1.20±0.05 kg/lt

Bulk density of fresh mortar

1.60±0.05 kg/lt

Water requirement

7 lt water in 25 kg powder

Application temperature

From +5°C to +30°C

Temperature resistance From -20°C to +70°C

Pot life

2 hours

Tile installation

At least 48 hours after completion of application

Coat thickness


Foot traffic

After 3 hours

Water impermeability per DIN1048 In water pressure of up to 7Atm (kg/cm²)


Strength for 28 days, per EN 196-1, in:

• flexion

7.00±1.00 N/mm²

• compression

25.00±1.00 N/mm²

Shrinkage per ASTM C596:


Permeability SD in CO2
per EN 1062-6:

SD > 50 m

Water vapour permeability SD
per ΕΝ ΙSO 7783-2:

SD < 5 m [ class Ι, (water vapour permeable)]

Capilary absorption of water (c)
per ΕΝ 1062-3:

w < 0.1 kg/m2.h0,5


Fiber reinforced, brushable cementitious mortar that protects, from water absorption, light weight fill materials to be covered with cement screeds. The protection is essential when those surfaces crack or they are unstable and dusting.
Penetration points, like cracked grout joints around tiles and marble, will soak lightweight fill materials, storing water within them.
A frequent occurence, resulting in the oxidization of the concrete steel reinforcement (rebars). The penetrating water gradually oxidizes them, and equally disintegrates the plaster and paint on the surfaces underneath resulting in bursting and peeling. Classified as a protective for concrete surfaces (c) per EN 1504-2.


HYDROSTOP FLOOR is absolutely necessary before installing tiles and marble, to waterproof substrates in swimming pools, bathrooms and showers, balconies, as well as terraces and aircrete.
Necessary for surface protection from moisture and  their smoothing out.
Surfaces with hairline cracks, exposed to intense temperature variations, as well as any intersecting points of vertical with horizontal surfaces to be covered with skirting boards, require flexible sealing.
The addition of DUROSTICK D-20, acrylic emulsion in the mixing water, at a ratio of 1 part D- 20 to 1 to 2 parts water or 1 part DUROMAX to 5 parts water, will increase the flexibility of the product, its surface  resistance to abrasion, its adhesion, and will also increase its waterproofing properties.
It is highly recommended to tile after at least two days.


1. Surface preparation
Clean all surfaces from dust, oil, grease, loose debris, and necessarily rinse with water thoroughly. Empty the mortar into a clean container with cool water, at a ratio of 7-7.5lt of water to 25kg of powder, and mix with a low speed electric mixer or a cement mixer, until a lump free, homogenous mass is created.

2. Application
Apply HYDROSTOP FLOOR, on soaked surfaces, in 2-3 crosswise layers of equal thickness, 1mm each, with 3-4 hours between coats. Use an emulsion brush (pic.2), roller (pic.3), or a floor squeegee or even the flat side of a notched trowel (pic.1) used for tile installations, to apply the product.
If the time between coats is more than 3-4 hours, then soak the surface again.


• The product, after hardening, is harmless to health.
•The newly coated surface must be protected from rain or frost for the next 24 hours, after completion of each coat.


1.3kg/m2/mm thick coat.


Store in tightly closed packages, in dry and shaded places for at least 12 months after production date.


The product contains Portland cement. Before using, refer to the cautions on the product packaging or the Material Safety Data Sheet.


Paper bag of 25kg on 1,500kg pallet