Which Kerakoll Keralevel floor leveling compound is needed? Decision guide with 5 questions

Three levelers. Three problems. A poor choice costs money — either you pay too much, or you have to redo it.

Quick decision: 5 questions

  1. Is there a wall, or just a floor? → Wall present: LR | Only floor: continue
  2. Urgent? (Will you want to cover after 2 hours?) → Yes: LR | No: continue
  3. Is vinyl, PVC, rubber, or LVT flooring coming? → Yes: Ultra | No: continue
  4. Commercial use/restaurant/hotel? → Yes: Ultra | No: continue
  5. Large area (50+ m²), do you have time?Eco
Keralevel Eco Keralevel Eco LR Keralevel Eco Ultra
Price 12,550 Ft / 25 kg 17,750 Ft / 25 kg 20,300 Ft / 25 kg
Ready for covering 24 hours 2 hours 2-6 hours
Can be applied on walls? No Yes No
Thickness 1-10 mm 1-25 mm Up to 20 mm
Strength C25 (25 N/mm²) C20 (20 N/mm²) C30 (30 N/mm²)
For flexible flooring? No No Yes
Material requirement ≈1.5 kg/m²/mm ≈1.3 kg/m²/mm ≈1.9 kg/m²/mm
Pot life 4 hours 20 minutes 20 minutes

Keralevel Eco

Large surface, no rush

12,550 Ft / 25 kg

When to use?

  • Large surface (50+ m²) in one go
  • You have 24 hours waiting time
  • Only floor (no wall)
  • Ceramic or stone covering will be applied

Example: 150 m² office, 5 mm leveling, new gres covering.

Why this?

  • 4-hour pot life: You work with one mix for hours. No remixing, no rushing.
  • Thixotropic: Stays in place even on sloped surfaces.
  • Lower price: You don’t pay for what you don’t use (fast setting, wall).

Material cost example (50 m², 5 mm):

  • Eco: 50 × 5 × 1.5 kg = 375 kg ≈ 15 bags = 188,250 Ft
  • Time: 2 days (leveling + 24 hours + covering)

When NOT to use?

  • There is also a wall → LR needed
  • Urgent (ready by tomorrow) → LR needed
  • Vinyl floor will be installed → Ultra needed
  • More than 10 mm needed in one layer → LR needed

Technical:

  • CT-C25-F6
  • 1-10 mm (maximum in one layer)
  • Walkable ≈24 hours
  • Coverable with ceramic ≈24 hours, parquet ≈3-5 days
  • ≈1.5 kg/m²/mm
  • Rating 2

Maximum layer thickness: 10 mm in one go. If more is needed: 10 mm first layer → 24 hours waiting → 10 mm second layer.

Keralevel Eco LR

Fast + On the Wall

17,750 Ft / 25 kg (+41% compared to Eco)

When is it needed?

  • After 2 hours you want to tile
  • There is also a wall (shower, stairs)
  • A thick layer is needed (up to 25 mm in one go)
  • LEED/BREEAM tender (Rating 5 required)

Example: Shower renovation — uneven wall, must be ready by tomorrow.

Why this one?

  • Tileable after 2 hours: Level in the morning, tile in the afternoon. One day = project done.
  • For walls too: Thixotropic + fast setting = does not slip on vertical surfaces.
  • 25 mm in one layer: No multiple applications, no waiting between layers.
  • Rating 5: Mandatory for green building projects (LEED, BREEAM).

Price-labor calculation (50 m², 5 mm, floor only):

  • LR: 50 × 5 × 1.3 kg = 325 kg ≈ 13 bags = 230,750 Ft material
  • Eco: 375 kg = 188,250 Ft material
  • Difference: +42,500 Ft material | BUT: -1 day labor cost (40,000-60,000 Ft) → LR cheaper overall

Why is the material more expensive?
Fast setting technology — special additives. But if the project is one day faster, the labor cost savings compensate.

When is it NOT suitable?

  • No rush, large surface → Eco is cheaper
  • Vinyl flooring coming → Ultra needed (smooth surface)
  • You work slowly → 20 minutes pot life may be too short

Technical:

  • CT-C20-F6
  • 1-25 mm (in one layer!)
  • Walkable ≈2 hours
  • Tileable ceramic ≈2 hours, parquet ≈12 hours
  • ≈1.3 kg/m²/mm
  • Suitable for vertical surfaces
  • Rating 5

Maximum layer thickness: 25 mm in one go — this is LR’s greatest advantage. If more is needed: 25 mm first layer → ≈2 hours waiting → second layer.

Keralevel Eco Ultra

Vinyl flooring + Commercial

20,300 Ft / 25 kg (+62% compared to Eco)

When is it needed?

  • Vinyl, PVC, rubber, LVT flooring is coming
  • Ultra-smooth surface is required (flexible covering does not hide defects)
  • Commercial use (restaurant, hotel, office with swivel chairs)
  • The project is on a ship (maritime certification)

Example: 300 m² restaurant, rubber flooring, 500+ guests daily.

Why this one?

  • C30-F7 strength: 30 N/mm² — the strongest in the range. For commercial load.
  • Ultra-smooth surface: Adhesive for vinyl/PVC/rubber flooring does not show through, no visible grooves.
  • EN 12529 rolling load: Restaurant trolley, hotel luggage cart — daily use.
  • Ship-certified: IMO maritime standard (vibration, temperature changes).

Price comparison (50 m², 5 mm, vinyl flooring):

  • Ultra: 50 × 5 × 1.9 kg = 475 kg ≈ 19 bags = 385,700 Ft material
  • Eco: 50 × 5 × 1.5 kg = 375 kg ≈ 15 bags = 188,250 Ft material
  • Difference: +197,450 Ft material | BUT: vinyl gluing is problematic with Eco → must redo → +150,000-200,000 Ft repair
  • Ultra is worth it: Preventing the problem is cheaper than repairing.

Why the most expensive?

  • C30 strength (vs. C25 Eco): higher cement and additive content
  • Ultra-smooth formula: special grain size distribution
  • Maritime certification: extra testing, compliance verification

When is it NOT suitable?

  • Ceramic covering is coming → Eco or LR is cheaper, C25/C20 is enough
  • Only residential area, no commercial use → Eco is sufficient
  • There is also a wall → LR is needed (Ultra does not go on walls)

Technical:

  • CT-C30-F7
  • Up to 20 mm (in one layer)
  • Coverable with vinyl/rubber ≈2 hours, ceramic ≈6 hours
  • ≈1.9 kg/m²/mm
  • EN 12529 rolling load
  • IMO ship certification
  • Rating 3

Maximum layer thickness: 20 mm in one pass.

Priming: What should go under Keralevel?

Keralevel does not adhere to wet, dusty, or unstable substrates. Primer is mandatory.
Substrate type Primer
Concrete, cement screed Universal Wall Primer
Porous concrete, old screed Active Prime Fix
Plasterboard, gypsum plaster Active Prime Fix (MANDATORY for gypsum)
Old tile, stone Keragrip Eco Pulep adhesion promoter
Painted surface Remove paint mechanically, then apply primer
Asphalt, bitumen Not suitable — Keralevel does not adhere to bitumen substrates

Important: Moisture measurement is mandatory. Maximum 2% CM (cement), 1% (gypsum). Wet substrate = no adhesion.

Project examples

Which one did they choose?

1. Hotel Bathroom (20 m², wall + floor)

Chosen: Keralevel Eco LR
Why? There was a wall (shower), it had to be ready by tomorrow. 2 hours till tiling + vertical surface = LR.

2. Office Vinyl Floor (150 m²)

Chosen: Keralevel Eco Ultra
Why? LVT floor — ultra-smooth surface needed, commercial use (30 people, swivel chairs). C30 strength + vinyl-compatible = Ultra.

3. Apartment Stoneware Floor (80 m²)

Chosen: Keralevel Eco
Why? Large area, 2 days available, ceramic tiles. 4-hour pot life = one mix for the whole area. Lower price. Eco.

4. Restaurant Renovation (200 m², rubber floor)

Chosen: Keralevel Eco Ultra
Why? Rubber floor + 300 guests daily + heavy kitchen equipment. C30 strength + EN 12529 rolling load = Ultra. Repair costs (if done poorly with Eco) exceeded the price of Ultra.

5. Stairwell Renovation (wall + stairs)

Chosen: Keralevel Eco LR
Why? Vertical surface (wall) + sloped stair surface. Only LR works on vertical/sloping surfaces. No alternative.

Frequently Asked Questions

Keralevel LR or Ultra for faster vinyl flooring?
Ultra. LR can be tiled after 2 hours for ceramic, but for vinyl/flexible flooring, Ultra provides an ultra-smooth surface. LR is not optimized for flexible coverings.

Why isn’t Ultra the best everywhere?
For ceramic coverings, C30 strength is unnecessary — C25 (Eco) is more than enough. You pay extra for a feature you don’t use. If there is no vinyl flooring and no commercial traffic, Ultra is wasteful.

Can Eco be applied on walls?
No. It slips. Only LR works on walls — the thixotropic formula plus fast setting together ensure it stays on vertical surfaces.

Why is LR more expensive if it is weaker (C20 vs. C25)?
Because speed does not come from strength but from special fast-setting technology. C20 is enough for residential and commercial use. The premium is in time saved, not strength.

Is there a cheaper alternative to Ultra for vinyl flooring?
No safe one. If the base is not ultra-smooth, sticking vinyl is problematic, the covering senses unevenness. Repair costs (re-gluing, possibly new flooring) exceed the price of Ultra.

Which is the "best"?
There is no "best," only "suitable for the project":

  • Eco: Large area, no rush → best (most economical)
  • LR: Wall present or urgent → best (only solution for walls)
  • Ultra: Vinyl flooring or commercial traffic → best (trouble-free result)

Common mistakes

(and how to avoid it)

Applied on a damp base → Does not adhere, flakes off
Solution: Moisture meter — max. 2% CM (cement), 1% (gypsum). Damp base = wait for drying or dry it.

No primer → Does not adhere, cracks, dusty surface
Solution: Primer suitable for the base (see the table above)

No deaeration (no spiked roller) → Air bubbles, weak surface, cracking
Solution: Roll with a spiked roller within 5-10 minutes after application — mandatory!

Too thick a layer in one go (e.g. Eco 15 mm) → Cracking, drying problems
Solution: Keep the maximum layer thickness: Eco 10 mm | LR 25 mm | Ultra 20 mm

Covering too quickly → Base not yet firm enough, covering lifts
Solution: Observe the waiting time: Eco 24 hours | LR 2 hours | Ultra 2-6 hours

Wrong water-to-powder ratio → Too thin: weak strength | Too thick: does not spread, air bubbles
Solution: Accurate measurement — 25 kg powder + 6-6.5 liters water (depending on product)

Dusty, loose base not cleaned → Does not adhere, peeling
Solution: Vacuuming + primer. If very loose: mechanical cleaning (sanding, chiseling).

Why Keralevel and not another manufacturer (Weber, Mapei)?

Keralevel Eco LR is unique: 2 hours workable + suitable for vertical surfaces. This combination is rare on the market. If the project is urgent AND there is a wall, the LR solves both.

Keralevel Eco Ultra: C30-F7 strength + ship certification + vinyl-optimized. The C30 strength (30 N/mm²) is an advantage in trade, the ship certification (IMO) proves resistance to extreme conditions.

Keralevel Eco: 4 hours pot life + thixotropic. For large surfaces (50+ m²) no re-mixing is needed, you work with one mix for hours.

Important: If you find a better alternative for your project, use it. We do not say that Keralevel is the best everywhere — we say that in these situations (fast+wall, vinyl+C30, large surface+long pot life) Keralevel solves the problem effectively.

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