Sika® Ucrete® SL
Sika® Ucrete® SL is a water dispersed polyurethane based/cement and aggregate screed. It is designed to be installed as a self-leveling floor topping that provides an easy-to-clean, smooth surface with slip resistance and is typically used for general, industrial applications. Sika® Ucrete® SL represents superior polyurethane cement technology, combining easier application and improved performance. Sika® Ucrete® SL typically installed at 80 - 160 mils (2 - 4 mm) thickness.
- Can be applied on green concrete, typically 7-10 days. Full 28 days cure time is not necessary.
- Can be applied over partially cured concrete substrates (> 4% mass (pbw –part by weight) as measured with Tramex® CME/CMExpert type concrete moisture meter surface moisture).
- Can be applied to concrete substrates where <100 % relative humidity is measured as per ASTM F2170.
- Resists a very wide range of organic and inorganic acids, alkalis, amines, salts and solvents. Consult Sika Technical Service for full details.
- Similar coefficient of thermal expansion to concrete allowing movement with the substrate through normal thermal cycling. It will perform and retain its physical characteristics through a wide temperature range from -40 °F (-40 °C) up to 248 °F (120 °C).
- Steam cleanable at 80 to 160 mils (2 to 4 mm) thickness.
- Non-tainting, odorless.
- Behaves plastically under impact / deforms but will not crack or debond.
- High abrasion qualities result from its aggregate structure.
- Maintain and extend existing expansion joints up through the Sika® Ucrete® Flooring System.
- Minimal maintenance costs, superior life cycle cost advantage versus tile.
- Meets the requirements of USDA for use in food plants.
System Structure
Usage
Sika® Ucrete® SL may only be used by experienced professionals.- Typically used in areas of medium to heavy loading and abrasion, to provide a smooth and flat self-leveling layer in general industrial areas, including warehouses, production facilities, laboratories and workshops, either with or without Sika® Ucrete® sealer top coat.
- As a neat or broadcast screed with optional UV-stable topcoat.
- When used as a base coat or layer for a MVT system, the minimum thickness of the Sika® Ucrete® SL is 125 mils. This is the minimum thickness prior to the broadcast of any aggregate.
Advantages
- Can be applied on green concrete, typically 7-10 days. Full 28 days cure time is not necessary.
- Can be applied over partially cured concrete substrates (> 4% mass (pbw –part by weight) as measured with Tramex® CME/CMExpert type concrete moisture meter surface moisture).
- Can be applied to concrete substrates where <100 % relative humidity is measured as per ASTM F2170.
- Resists a very wide range of organic and inorganic acids, alkalis, amines, salts and solvents. Consult Sika Technical Service for full details.
- Similar coefficient of thermal expansion to concrete allowing movement with the substrate through normal thermal cycling. It will perform and retain its physical characteristics through a wide temperature range from -40 °F (-40 °C) up to 248 °F (120 °C).
- Steam cleanable at 80 to 160 mils (2 to 4 mm) thickness.
- Non-tainting, odorless.
- Behaves plastically under impact / deforms but will not crack or debond.
- High abrasion qualities result from its aggregate structure.
- Maintain and extend existing expansion joints up through the Sika® Ucrete® Flooring System.
- Minimal maintenance costs, superior life cycle cost advantage versus tile.
- Meets the requirements of USDA for use in food plants.
Color
Available in standard Sika® Ucrete® colors
System Details
System Structure
Sika® Ucrete® SL 80 - 160 mils (2- 4 mm)
| Description | Products | Thickness mils |
| 1. Primer | Sika® Ucrete® TC31 NA | 15 - 20 |
| 2. Slurry | Sika® Ucrete® HS24 NA | 80 - 160 |
Options
| Description | Products | Thickness mils |
| Primers | Sikafloor®-2570 WB | 3 - 5 |
| Top Coat | Sika® Ucrete® TC31 NA | 15 - 20 |
Nominal thickness
80 to 160 mils (2 - 4 mm)
Minimum thickness
80 mils (2 mm)
Shore D Hardness
| 83 | ASTM D2240 at 73 °F (23 °C) and 50% R.H |
Abrasion Resistance
| CS-17/1000 cycles/1000g - 0.07g loss H-22/1000 cycles/1000g - 0.24g loss | ASTM D4060 at 73 °F (23 °C) and 50% R.H |
Compressive Strength
| 6,961 psi (48 MPa) 28 days | ASTM 579 at 73 °F (23 °C) and 50% R.H |
Flexural Strength
| 2,726 psi (18.8 MPa) | ASTM C580 at 73 °F (23 °C) and 50% R.H |
Tensile Strength
| 1,290 psi (8.9 MPa) | ASTM C307 at 73 °F (23 °C) and 50% R.H |
Coefficient of Thermal Expansion
| 3.02 x 105 in/in/°F (5.43 x 105 mm/mm/°C) | ASTM D696 at 73 °F (23 °C) and 50% R.H |
Chemical Resistance
Please consult Sikafloor Technical Services
Microbiological Resistance
| Resistance to Fungi Growth Rated 0 (no growth) | ASTM G21 at 73 °F (23 °C) and 50% R.H |
| Resistance to Mold Growth Rated 10 (highest resistance) | ASTM D3273 at 73 °F (23 °C) and 50% R.H |
Thermal Conductivity
| Pass | ASTM C884 at 73 °F (23 °C) and 50% R.H |
Indentation
| ~0% | MIL-PRF-24613 at 73 °F (23 °C) and 50% R.H |
Water Absorption
| 0.10% | ASTM C413 at 73 °F (23 °C) and 50% R.H |
Application
Ambient Air Temperature
Minimum/Maximum 40°/85 °F (4°/30 °C)
Substrate Temperature
Minimum/Maximum 40°/85 °F (4°/30 °C)
Pot Life
Please refer to the individual Product Data Sheet
Waiting / Recoat Times
Please refer to the individual Product Data Sheet
Coverage
| Description | Products | Approximates Sq.Ft./kit |
| 1. Primer | Sika® Ucrete® TC31 NA | 224 @ 15 mils |
| 2. Slurry | Sika® Ucrete® HS24 NA | 107 @ 80 mils |
Options
| Description | Products | Approximates Sq.Ft./kit |
| Primers | Sikafloor®-2570 WB | 2,667 @ 3 mils |
| Top Coat | Sika® Ucrete® TC31 NA | 224 @ 15 mils |
SUBSTRATE PREPARATION
Concrete surfaces must be clean and sound. Remove all dust, dirt, existing paint films, efflorescence, exudates, laitance, form oils, hydraulic or fuel oils, brake fluid, grease, fungus, mildew, biological residues or any other contaminants which may prohibit a good bond.
Prepare the surface by any appropriate mechanical means, in order to achieve a profile equivalent to ICRI - CSP 3-6. The compressive strength of the concrete substrate should be at least 3,625 psi (25 MPa) at 28 days and a minimum of 218 psi (1.5 MPa) in tension at the time of application.
Repairs to cementitious substrates, filling of blowholes, leveling of irregularities, etc. should be carried out using an appropriate Sika profiling mortar. Contact Sika Technical Service for a recommendation.
Edge Terminations
All free edges of a Sika® Ucrete® floor, whether at the perimeter, along gutters or at drains, require extra anchorage to distribute mechanical and thermal stresses. This is best achieved by forming or cutting grooves in the concrete. Grooves should have a depth and width of 2 times thickness of the Sika® Ucrete® floor. Refer to the edge details provided at http://usa.sika.com.
If necessary, protect all free edges with mechanically attached metal strips. Do not featheredge, always turn into an anchoring groove.
Expansion Joints
Expansion joints should be provided in the substrates at the intersection of dissimilar materials. Isolate areas subject to thermal stresses, vibration movements, or around load-bearing columns and at vessel sealing rings. Refer to details provided at http://usa.sika.com.
Priming
Please refer to the individual Product Data Sheet for each component.
MIXING
Please refer to the individual Product Data Sheet
APPLICATION
Please refer to the individual Product Data Sheet