Sikafloor®-280
Sikafloor®-280 is a 3-part epoxy, high strength, thixotropic, resin flooring mortar for screeds, coving and detailing. It has high mechanical strengths, good abrasion and impact resistance. Layer thickness: 2–10 mm. Internal and external use.
- Very high abrasion resistance
- Very high impact resistance
- High compressive and flexural strengths
- High adhesion to substrate
- Supplied in prebatched units
Usage
- Epoxy screeds with a layer thickness of 2–10 mm
- Heavy mechanical wear conditions (e.g. metal industry, print shops, loading ramps )
- Repair mortar for floors, bridge and car park decks, concrete roads
Advantages
- Very high abrasion resistance
- Very high impact resistance
- High compressive and flexural strengths
- High adhesion to substrate
- Supplied in prebatched units
Packaging
| Part A | 1.875 kg container |
| Part B | 0.625 kg container |
| Part A+B | 2.5 kg unipacks |
| Part C | 25 kg bag |
| Part A+B+C | 27.5 kg ready to mix unit |
Refer to current price list for packaging variations
Colour
Final appearance: Semi- gloss finish
| Resin - Part A | transparent, liquid |
| Hardener - Part B | brownish, liquid |
| Quartz sand - Part C | coloured, powder |
Standard colours: ~RAL 7032
Colour deviations may occur due to filling with quartz sand.
When product is exposed to direct sunlight, there may be some discolouration and colour variation, this has no influence on the function and performance of the coating.
Product Details
APPROVALS / STANDARDS
- CE Marking and Declaration of Performance to EN 1504-2 - Surface protection product for concrete - Coating
- CE Marking and Declaration of Performance to EN 13813 - Resin screed material for internal use in buildings
- Suitability as a Repair Material for Concrete Roads MEB-3, Sikafloor®-280, Polymer Institut, Test report No. P 1658
Chemical Base
Epoxy
Shelf Life
24 months from date of production
Storage Conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Density
| Part A | ~1,10 kg/l |
| Part B | ~1,02 kg/l |
| Resin mixed | ~1,40 kg/l |
All Density values at +23 °C.
Solid content by weight
~100 %
Solid content by volume
~100 %
Product Declaration
EN 1504-2: Surface protection product for concrete - Coating
EN 13813: Resin screed material for internal use in buildings
Abrasion Resistance
Refer to Polymer Institut, Test report No. P 1658. Also includes impact resistance values.
Compressive Strength
| ~80 N/mm2 (7 days / +23 °C) | (EN 196-1) |
Flexural Strength
| ~30 N/mm2 (7 days / +23 °C / 50 % ) | (EN 196-1) |
Tensile Adhesion Strength
| > 1.5 N/mm² (failure in concrete) | (ISO 4624) |
Thermal Resistance
| Exposure* | Dry heat |
| Permanent | +50 °C |
| Short-term max. 7 d | +80 °C |
| Short-term max. 12 h | +100 °C |
Short-term moist/wet heat* up to +80 °C where exposure is only occasional (steam cleaning etc.).
* No simultaneous chemical and mechanical exposure
Application
Mixing Ratio
Part A : Part B : Part C= 7.5 : 2.5 : 100 (by weight)
Layer Thickness
~2 min. / 10 mm max.
Additional layer thickness's can be applied in successive layers once each layer has cooled and hardened sufficiently. The surface of the freshly applied intermediate layers must be scratched to form a key for subsequent layers.
Ambient Air Temperature
+10 °C min. / +30 °C max.
Relative Air Humidity
80 % max.
Dew Point
Beware of condensation.
The substrate and uncured applied floor material must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the floor finish.
Low temperatures and high humidity conditions increase the probability of blooming.
Substrate Temperature
+10 °C min. / +30 °C max.
Substrate Moisture Content
≤ 4 % parts by weight
Test method: Sika®-Tramex meter, CM-measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).
Pot Life
| Temperature | Time |
| +10 °C | ~60 minutes |
| +20 °C | ~40 minutes |
| +30 °C | ~25 minutes |
Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Curing Time
Before applying Sikafloor®-150/-151 on Sikafloor®-280 allow:
| Substrate temperature | Minimum | Maximum |
| +10 °C | 24 hours | 4 days |
| +20 °C | 14 hours | 2 days |
| +30 °C | 8 hours | 1 day |
Consumption
~2.2 kg/m²/mm
These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc. For detailed information, refer to the System Data Sheets: Sikafloor® MultiDur ES-43.
MIXING
Prior to mixing all parts, mix separately part A (resin) using a low speed single paddle electric stirrer (300 - 400 rpm). Add Part B (hardener) to Part A and mix Part A + B continuously for 3 minutes until a uniform mix has been achieved. When parts A and B have been mixed. Using a double paddle (axis) electric stirrer (>700W), pan type revolving or forced action mixer or other suitable equipment (free fall mixers must not be used). Gradually add Part C quartz sand and if required Extender T. Mix for a further 2 minutes until a uniform mix has been achieved. To ensure thorough mixing pour materials into another container and mix again to achieve a smooth consistent mix. Excessive mixing must be avoided to minimise air entrainment. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing. Mix full units only. Mixing time for A+B+C = 5 minutes.
APPLICATION
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
Prior to application, confirm substrate moisture content, relative air humidity, dew point, substrate, air and product temperatures. If moisture content > 4% parts by weight, Sikafloor® EpoCem® may be applied as a Temporary Moisture Barrier (T.M.B.) system.
PRIMER APPLICATION
Porous substrates
Pour mixed Sikafloor®-150/-151 primer onto the prepared substrate and apply by brush, roller or squeegee. Ensure a continuous, pore free coat covers the substrate.
Confirm primer waiting /overcoating time has been achieved before applying subsequent products. Refer to individual primer Product Data Sheet.
Bonding bridge / impregnation:
Pour mixed Sikafloor®-150 primer onto the prepared substrate and apply by brush, roller or squeegee. Ensure a continuous, pore free coat covers the substrate.
Confirm primer waiting /overcoating time has been achieved before applying subsequent products. Refer to individual primer Product Data Sheet.
Screed mortar:
Apply the screed mortar evenly onto the tacky bonding bridge, using levelling boards, guide rails as necessary and suitable application tools. After a short waiting time and allowing mortar to start hardening, compact and finish the screed with a trowel or teflon coated power float (usually 20–90 rpm). Power floats must only be used on mortar layers > 8 mm.
Repair mortar:
The repair mortar must be applied onto the tacky bonding bridge between the minimum and maximum layer thicknesses without the formation of voids. Where layers are to be built up, each layer must be allowed to harden before applying subsequent layers “wet on wet”.
CLEANING OF TOOLS
Clean all tools and application equipment with Thinner C immediately after use. Hardened material can only be removed mechanically.