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The concrete itself becomes the waterproofing

CRYSTALLOCK 1K does not just sit on the surface: it reacts with the moisture in the concrete to form water-insoluble crystals, sealing the structure against water from within.

Crystallization in the capillaries of concrete Section: groundwater on the left, concrete with capillaries in the middle, and the layer applied to the inner side on the right. The crystals block the water’s path, while vapor can still escape. Groundwater Concrete Interior CRYSTALLOCK 1K layer

Felhasználás

Where can you use it?

For reinforced concrete structures, outside and inside, including below groundwater level.

  • Structures below groundwater level

    On both the inside and the outside.

  • Floors

    Protection against moisture and water coming from below (negative side).

  • Foundations

    Prevents groundwater from seeping up into foundation walls.

  • Elevator shafts

    Waterproofing of shaft walls, also from the inside.

  • Tunnels

    Underground reinforced concrete structures.

  • Underground garages

    Walls and floors of underground car parks.

  • Corrosion protection

    Protects concrete structures against the corrosive effect of groundwater.

  • Terrace gardens

    Waterproofing of terrace gardens.

  • Wet rooms

    Kitchens, balconies, bathrooms, toilets.

Kivitelezés

Application step by step

Crystallization only starts on clean, damp concrete, so surface preparation is just as important as the application itself.

  1. Clean the surface

    Remove formwork oil, paint and dust. The surface must be free of voids and cracks.

  2. Fill the gaps left by embedded items

    Remove any metal and wooden inserts from the surface and fill the cavities with repair mortar, for example VIRANIX REPAIR 800 R4.

  3. Stop active leaks

    If water is flowing, first seal the leak point with a fast-setting plugging compound.

    Figyelem Do not apply CRYSTALLOCK 1K directly onto flowing water.

  4. Pre-wet the concrete

    The surface must be pre-wetted before application.

    Tipp Crystal formation needs moisture, so do not skip this step.

  5. Mix and apply by brush

    Mix the powder with water until lump-free and apply by brush to a total thickness of approx. 2 mm. The mixed material remains workable for 50 minutes on average.

    Tipp Only mix as much as you can apply within 50 minutes.

  6. Let it dry

    Complete drying takes 7 days.

Calculator

How much do you need for your surface?

Enter the size of the area to be waterproofed. The calculation assumes a smooth surface and a 2 mm layer with a consumption of 1.5–2.0 kg/m².

Enter the surface area in square meters.

Material required
–
Recommended quantity
–
Estimated price
–

Actual consumption depends on the condition of the surface and on site conditions, so the recommended number of bags is based on the upper value.

Adatlap

Technical data

Material
Cement-based mortar modified with active chemical additives
Water vapor permeability
Class I
Pull-off adhesion strength
Rigid system without traffic
Reaction to fire
A1
Bond strength
≥ 1 N/mm²
Capillary water absorption and water permeability
max. 0.1 kg/m²·h⁰·⁵
Powder density
1,300 ± 200 kg/m³
Pot life
50 minutes on average
Complete drying
7 days
Material consumption
1.5–2.0 kg/m² powder (smooth surface, 2 mm)
Application tool
Brush
Packaging
25 kg kraft bag

Safe use

  • Corrosive
  • Irritant
  • H315Causes skin irritation.
  • H318Causes serious eye damage.
  • H335May cause respiratory irritation.
  • P260Do not breathe dust.
  • P280Wear protective gloves, eye protection and face protection.
  • P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes.
  • P501Dispose of waste in accordance with local regulations.

Alkaline, cement-based material. In case of eye contact, rinse immediately with plenty of water and call a doctor.

GYIK

Frequently asked questions

Can't find the answer? Call us at +36 70 575 5500 or write to info@viranix.hu.

Can it be used from the inside, from the basement side?

Yes. CRYSTALLOCK 1K makes concrete watertight from both the water side (positive side) and the inside (negative side), so it can be used outside and inside on structures below groundwater level, including retrofit basement waterproofing.

How much do I need, and how large an area does one bag cover?

On a smooth surface with a 2 mm layer you need 1.5–2.0 kg/m² of powder, so one 25 kg bag covers approx. 12–16 m². You can calculate the exact quantity with the calculator.

How long does the mixed material remain workable?

For 50 minutes on average. Only mix as much as you can apply within that time.

When is it completely dry?

Complete drying takes 7 days.

What should I do if water is running down the wall?

With active water leakage, the leak point must first be sealed with a fast-setting plugging compound; only then may CRYSTALLOCK 1K be applied.

How should I prepare the surface?

Remove formwork oil, paint and dust; the surface must be free of voids and cracks. Remove metal and wooden inserts and fill the cavities with repair mortar. Pre-wet the concrete before application.

Will the wall still breathe afterwards?

Yes. The surface remains water-vapor permeable (Class I); the crystals block the path of water.

Is it frost-resistant? Can it be used outdoors?

It is freeze–thaw resistant. On structures below groundwater level it can be used on both the inside and the outside.

Which structures is it suitable for?

For reinforced concrete structural elements such as foundation walls, floors, elevator shafts, tunnels and underground garages. For other substrates, please ask us for advice.

Which tool is used for application?

With a brush.

Is it fire-resistant?

It is classified A1 for reaction to fire, i.e. non-combustible.

What protective equipment is needed?

Gloves, eye protection and face protection are mandatory; do not breathe the dust. In case of eye contact, rinse immediately with plenty of water and call a doctor.

Rendszer

You may also need

Request a quote for larger areas

Waterproofing a basement, foundation or shaft? Tell us the size and condition of the surface and we will help you calculate the material requirement.

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