Sikafloor®-357 Level
Sikafloor®-357 Level is a one-component, polymer modified, durable, fast track and versatile cementitious underlayment and overlayment for interior concrete and cementitious substrates. It can be applied manually or by pump at higher thickness with extreme low shrinkage to produce a self-smoothing, rapid-setting, flat and economical substrate prior to the application of a final floor finish.
- Easy and quick installation by manual and pump application
- Zero VOC content and low odour
- Highly fluid and self-levelling with good air release
- Very rapid hardening, can be walked on after 3 hours (+20 °C)
- Low shrinkage
- Good bonding and impact strength
- Maintains good workability and joint healing throughout its pot life
- Good surface appearance and hardness
- Application range as levelling or under layer from 5 mm up to 50 mm
Usage
Sikafloor®-357 Level is a multi-purpose floor levelling compound to level or smooth screeds and concrete floors at a thickness between 5-50 mm in one working step. Useable as screed for industry service conditions when sealed with a PU or EP resin top coat.- Suitable for various floors, carpets, ceramics and floorcoverings.
- Will provide a fast over-coat able surface prior to the application of epoxy or polyurethane resins.
Advantages
- Easy and quick installation by manual and pump application
- Zero VOC content and low odour
- Highly fluid and self-levelling with good air release
- Very rapid hardening, can be walked on after 3 hours (+20 °C)
- Low shrinkage
- Good bonding and impact strength
- Maintains good workability and joint healing throughout its pot life
- Good surface appearance and hardness
- Application range as levelling or under layer from 5 mm up to 50 mm
Packaging
25 kg/bag
Colour
Natural
Product Details
Chemical Base
Cement based, Polymer modified
Shelf Life
6 months
Storage Conditions
Store with original, unopened packaging. Store in cool, dry place.
Density
Approx. 2.0 kg/ltr (wet density)
System Structure
Primer:
light porous concrete surface: Sikalastic®-500 Acrylic Primer HK, Sikafloor®-01 Primer TH
high porous concrete surface : Sikadur®-732
Leveling:
Sikafloor®-357 Level
Abrasion Resistance
Result | Requirement | |
H22‚ 500 g, 100 r | 0.14 | ≤ 0.5 |
Test result according to JC/T 985-2005.
Compressive Strength
Result | Requirement | |
24 h | 25 | ≥ 6 |
28 d | 38 | ≥ 35 |
Test result according to JC/T 985-2005.
Tensile Strength in Flexure
Result | Requirement | |
24 h | 6.0 | ≥ 2 |
28 d | 7.0 | ≥ 7 |
Test result according to JC/T 985-2005.
Tensile Adhesion Strength
Result | Requirement |
1.7 | ≥ 1.0 |
Test result according to JC/T 985-2005.
Reaction to Fire
A1
Application
Ambient Air Temperature
+5 °C min. / +30 °C max.
For increased surface strength and better bond of the floor finish when using water based adhesives, it is recommended for best results to apply the mortar at ambient and substrate temperatures between 15 °C and 25 °C.
Relative Air Humidity
< 75 % max.
Substrate Temperature
+5 °C min. / +30 °C max.
Pot Life
Conditions | Time |
+23 °C / 50 % r.h. | 20 minutes |
The temperature will affect the pot life.
Application at temperatures above +23 °C will reduce the pot life and the working time. Temperatures below +23 °C will increase the pot life and extend the working time.
Waiting Time / Overcoating
- Suitable for overcoating with impermeable or moisture sensitive floors after drying (max. 4 % humidity); normally reached after 24 hours in 5 mm thick.
- Times are approximate and at +23 °C and 50 % R.H. and thus will be affected by changing substrate and ambient conditions, particularly the temperature and relative humidity.
- When over coating Sikafloor®-357 Level always ensure the moisture content has achieved the required value for the coating product, as the waiting time will vary with the application thickness and ambient humidity.(Refer to the top coat product data sheet)
Applied Product Ready for Use
At +20 °C and 50 % r.h.
Foot traffic | ~ 3 hours |
Lightly serviceable | ~ 24 hours |
Lightly serviceable | ~ 7 days |
Note: Times are approximate and will be affected by changing substrate and ambient conditions, particularly the temperature and relative humidity.
Consumption
~ 1.7kg/m2/mm | Powder |
This figure is theoretical and does not include for any additional material required due to surface porosity, surface profile, variations in level or wastage etc.
EQUIPMENT
Use an electric stirrer (< 600 rpm).
MIXING
- Pour 5.5L of cool, potable water into a suitably sized and clean mixing container, using a calibrated measuring jug, or similar, to ensure strict control of the water content (avoid over-watering).
- Cool water 21°C serves to maximize the working time; if available water is not at this temperature, then consideration should be given to cooling the water.
- Add Sikafloor®-357 Level to the water, while slowly mixing with a low speed electric mixer (< 600 rpm), adding the complete contents of the 25kg bag.
- Once all the powder has been added, continue mixing until a lump-free and uniform consistency is achieved. This should typically take no less than 3 minutes. But do not over-mix or allow the paddle to rise above the level of material as this will introduce and entrap air into the mix, potentially shortening the working life or causing pin-holing in the underlayment.
- Let the mixed material stand until the majority of air bubbles have dispersed.
- When pump-mixing, employ the 5.5L to 25kg water to powder ratio within a continuous mixer and pump, or a batch mixer and pump, ensuring that the mechanical mixers and pumps are in sound working order.
- Pre-clean and test the equipment, checking that the mixing and pumping elements are fully functional and that meshes are in place to prevent foreign matter from entering the hopper or being dispensed onto the floor.
- Mix thoroughly for a minimum of 3 minutes.
- After mixture, please test the flow first, if the flow is too high or lower than specification, please reduce or increase water dosage.
APPLICATION
Prior to placing the underlayment, ensure that all sources of premature drying or direct sunlight are blocked off to avoid accelerated curing and reduced physical properties. The stated ambient and substrate application temperatures are to be achieved before installation and should be maintained for a period of at least 3 days thereafter.
Pump:
- Use a conventional floor screed continuous or dual stage mixer and pump and control the water dosage to achieve the required flow, measuring the final average flow diameter on a flat, clean, dry horizontal surface.
- Cylinder according to JC/T 985-2005
- Internal diameter: 30 mm Height: 50 mm
- Flow =140mm ± 10mm (5.5 L water per 25 kg)
- After placing onto the surface, apply by trowel or pin screed rake to the required thickness.
- The use of a spiked roller is recommended for improved surface homogeneity.
- Roll thoroughly with a spiked roller in two directions to remove any entrapped air, but do so quickly and just after it has been applied and move on.
- Do not over-roll!
Manual:
- Pour the mixed material onto the prepared surface and apply by trowel or pin screed rake to the required thickness.
- Roll thoroughly with a spiked roller in two directions to remove any entrapped air.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.