deep-penetrating priming emulsion

P1  na ściany P1 na ściany
P2  na podłogi P2 na podłogi
P3  do wewnątrz P3 do wewnątrz
P4  na zewnątrz P4 na zewnątrz
W1  mrozoodporność W1 mrozoodporność
W2  wodoodporność W2 wodoodporność
N7  pędzel N7 pędzel
N9  wałek N9 wałek
D4 czas wysychania 2h D4 czas wysychania 2h

Product description

Substrates primed with ATLAS UNI GRUNT ULTRA have decreased and unified absorptivity, which ensures adhesion of the following layers.
Emulsion penetrates into the substrate, bonds aggregate grains and reinforces primed layer.
Ultra efficiency – one 5 kg packaging of ATLAS UNI-GRUNT ULTRA is sufficient for priming:
- 50 m2 of floor prior to the application of self-levelling mass
- 115 m2 of plaster prior to the application of top coat, installation of ceramic cladding,
- 150 m2 of substrate prepared for painting.
Special pigment contained in product colours the substrate, which enables to control the work progress, while the primer is still wet and when it dries – the colour does not decrease ability for covering of painting coats.

Main properties

    - significantly improves adhesion to the substrate - decreases and unifies substrate absorptiveness - underneath adhesives, plasters, top coats, paints

Main parameters

    Emulsion density: approx. 1,0 g/cm³ Substrate and ambient temperature during work: from +5 ºC up to +30 ºC Further work after priming (depending on substrate type): - after 15 minutes – plasters, silicate hollow blocks, aerated concrete blocks - after 2 hours – self-levelling floors


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Proper substrate preparation is a base for a success of the entire construction project. The use of ATLAS UNI GRUNT ULTRA, a primer consisting very high content of polymeric dispersion, guarantees safety and assurance that the further works will be carried out on substrate:,

- with optimally decreased and unified water absorption,                

- unified absorptivity on entire surface,

- ensuring highest possibly adhesion to the following layers.


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ATLAS UNI-GRUNT ULTRA is a priming agent for various types of substrate (walls, floors, ceilings), for indoor and outdoor use.

For priming substrates prior to the application of floors, installation of ceramic cladding, plastering, floating, wallpapering and painting. 

Depending on type of construction work and place of application, primer should be diluted in compliance with the instruction.


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ATLAS UNI-GRUNT ULTRA, category A/h/FW maximum content of VOC in the product below 1.9 g/l, maximum allowable content of VOC 30 g/l.

Emulsion density

approx. 1,0 g/cm³

Substrate and ambient temperature during work

from +5 ºC up to +30 ºC

Further work after priming (depending on substrate type)

- after 15 minutes – plasters, silicate hollow blocks, aerated concrete blocks

- after 2 hours – self-levelling floors


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Substrate preparation

The substrate should be dry, free from dust, dirt, oils, grease and wax. Remove any loose, poorly bonded layers prior to the emulsion application. In case of gypsum plasters, the sediment formed during sanding should be removed.

Emulsion preparation

ATLAS UNI-GRUNT ULTRA is manufactured as an ultra-efficient emulsion, ready for use after dilution in water in the following ratio:

-       1:3 underneath the floor,

-       1:6 underneath the plasters and top coats,

-       1:8 underneath the paints. 


The emulsion should be applied upon the substrate with a roller, brush, or spraying machine with thin and uniform coat. For the very absorptive and weak substrates, priming should be carried out twice, with wet on wet technology. In case of priming of surfaces underneath the floor. such emulsion should be poured on substrate and distributed evenly without forming puddles. If the substrate is still absorptive after product drying, priming should be repeated.

Surface use

Painting, wallpapering, tiling, etc., can commence when emulsion dries. The primer should form matt surface after drying. Time of drying depends on temperature and humidity conditions:

-       15 minutes – plasters, silicate hollow blocks, aerated concrete blocks

-       2 hours – floors and screeds


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Average consumption of ATLAS UNI-GRUNT ULTRA:

- 0,1 kg/m² underneath self-levelling screeds,

- 0,043 kg/m² underneath top coats, adhesives for ceramic cladding,

- 0,033 kg/m² underneath paints.

In practice consumption depends on substrate absorptivity level.



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Plastic containers: 1 kg, 5 kg


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Before priming, carefully secure all elements nearby, e.g. glass, woodwork, flashings, etc. Tools should be cleaned with clean water directly after use.

Possible emulsion stains can be removed with ATLAS AGENT FOR REMOVAL OF STAINS OF PAINTS, PRIMERS AND RENDERS.

Contains 2-methylizothiazol-3(2H)-one. May produce an allergic reaction. Keep out of the reach of children. Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. If skin irritation or rash occurs: Get medical advice/attention. Contains biocides:

- Tetrahydro-1,3,4,6-tetrakis(hydroxymethyl)imidazo[4,5-d]imidazole-2,5(1H,3H)-dione CAS:5395-50-6

- 2-methyl-2H-isothiazol-3-one CAS: 2682-20-4

- 1,2 – benzisothiazol-3(2H)-one CAS: 2634-33-5

Proceed in accordance with the Safety Data Sheet. 

The product should be transported and stored in tightly sealed original and labelled packaging, in dry, cool and well ventilated room. Protect against direct sunlight, sources of heat, hot surfaces and open flames. Temperature of storage from +5°C up to +30°C. Protect against freezing. Product should be mixed before use. While maintaining conditions above, no adverse interactions known. Shelf life: 18 months from the date of manufacturing shown on the packaging.

The above information constitutes basic guidelines for the application of the product and does not release the user from the obligation of carrying out works according to engineering principles and OHS regulations. At the time of publication of this product data sheet all previous ones become void. All current technical documentation is available on www.atlas.com.pl/en.

Date of update: 2020-02-13

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deep-penetrating priming emulsion

Current documentation