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Sika Ucrete UL, Cementitious Underlayment Screed for Ucrete, Interior, Grey, 20 Kg

Sika Ucrete UL, Cementitious Underlayment Screed for Ucrete, Interior, Grey, 20 Kg

Screeds
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging 20 kg
Usage Underlayment screed for Ucrete flooring systems
Chemical Base Special cements
Usage Area Interior
Color Grey
Storage Conditions The Product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +35 °C. Always refer to the packaging.Refer to the current Safety Data Sheet for information on safe handling and storage.
Density N/A
Consumption 2.2 kg/m2per mm of thickness
Application Thickness 10 mm - 100 mm
Ambient Air Temperature +5°C min. / +30°C max.
Substrate Temperature +5°C min. / +30°C max.
Waiting Time +10°C – 16h

Heavy-duty, cementitious, underlayment screed for Sika Ucrete flooring systems

Sika Ucrete UL is a one-part, fast-curing, shrinkage compensated underlayment screed for use beneath Sika Ucrete flooring systems. It is a ready-to-use material that contains special hydraulic binders, well-graded sands and specifically selected polymers. Depending on the mixing water addition, the consistency of the mortar can be adjusted to provide a thixotropic material for application to falls or a fluid material for levelling or pumping.

  • Fast curing and fast strength-development at low temperature allows for early preparation and application of Sika Ucrete flooring after 16 hours at +10 °C
  • Very good resistance to thermal shock when used as part of a Sika Ucrete flooring system
  • Very good workability and finishing in all consistencies
  • Easy to apply and lay as a monolithic flat floor finish or on a slope
  • Low shrinkage, reducing stress on the substrate and reducing the risk of cracking
  • Pre-batched, one-part mortar that only needs the addition of water
  • Suitable for internal or external application, on all horizontal surfaces, in dry and wet environments
  • Layer thickness of 10–100 mm
Usage
Sika Ucrete UL is used as an underlayment screed for Sika Ucrete flooring systems. Please note:
  • The Product may only be used by experienced professionals.
 
Advantages
  • Fast curing and fast strength-development at low temperature allows for early preparation and application of Sika Ucrete flooring after 16 hours at +10 °C
  • Very good resistance to thermal shock when used as part of a Sika Ucrete flooring system
  • Very good workability and finishing in all consistencies
  • Easy to apply and lay as a monolithic flat floor finish or on a slope
  • Low shrinkage, reducing stress on the substrate and reducing the risk of cracking
  • Pre-batched, one-part mortar that only needs the addition of water
  • Suitable for internal or external application, on all horizontal surfaces, in dry and wet environments
  • Layer thickness of 10–100 mm
Packaging

20 kg

Refer to the current price list for available packaging variations.
Colour

Grey
Technical Information
Compressive Strength

Conditioned 24 h at +5 °C

≥ 45 N/mm2

Conditioned 24 h at +23 °C

≥ 50 N/mm2

Conditioned 72 h at +5 °C

≥ 55 N/mm2

Conditioned 72 h at +23 °C

≥ 60 N/mm2

Conditioned 28 d at +23 °C

≥ 70 N/mm2

Conditioned 28 d at +23 °C

≥ 80 N/mm2

Flexural Strength

Conditioned 24 h at +23 °C

≥ 7.0 N/mm2

Conditioned 72 h at +23 °C

≥ 7.5 N/mm2

Conditioned 7 d at +23 °C

≥ 9.0 N/mm2

Conditioned 28 d at +23 °C

≥ 10.0 N/mm2

Tensile adhesion strength

≥ 3.0 N/mm2

(EN 1542)

Reaction to Fire

Class A1fl

(EN 13501-1)

Capillary Absorption

≤ 0.5 kg/m²/h½

(EN 13057)
Application Information
Fresh mortar density

2.2 kg/L

(EN 1015-6)
Layer Thickness

Maximum

100 mm

Minimum

10 mm
Product Temperature

Maximum

+30 °C

Minimum

+5 °C
Ambient Air Temperature

Maximum

+30 °C

Minimum

+5 °C
Mixing Ratio

Bonding slurry

2.6–2.9 L

Pourable consistency

2.5–2.9 L

Thixotropic consistency

1.9–2.1 L
Substrate Temperature

Maximum

+30 °C

Minimum

+5 °C
Waiting Time / Overcoating

Temperature

Waiting time

+10 °C

16 hours

Note: Times are approximate and will be affected by changing ambient and substrate conditions.