Epoxy-cement hybrid multipurpose flooring mortar and self-smoothing screed (1.5–3.0 mm) Sikafloor-81 EpoCem is a 3-part, epoxy modified cementitious, multipurpose flooring mortar. - Can be overcoated with resin based floor finishes after 24 hours
- Prevents osmotic blistering of resin based floor finishes on damp substrates
- Fast and easy application
- Concrete repair mortar: EN 1504-3:Class R4
- Good levelling properties
- Impervious to liquids, permeable to water vapour
- Freeze thaw and de-icing salt resistant
- Good chemical resistance
- Thermal expansion properties similar to concrete
- Good bond to green or hardened concrete whether damp or dry
- Good early and final mechanical strengths
- Good resistance to water and oils
- Suitable surface for overlaying smooth floor finishes
- Low VOC emissions
- Will not corrode reinforcement steel
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Usage On interior industrial flooring cementitious substrates including vacuum dewatered concrete floors as a: Temporary moisture barrier (TMB)- Allows the application of Sika Epoxy, Polyurethane and PMMA resin floors onto high moisture content substrates or green concrete
Self-smoothing screed - Levelling or patch repairing horizontal floors for new, refurbishment or maintenance works
- Unaesthetic floor topping on non-ventilated damp substrates
- Levelling layer under Sika Epoxy, Polyurethane and PMMA flooring systems, tiles, carpets, laminate, wooden, linoleum and vinyl sheet flooring
Repair mortar- Repairing the substrate before application of Sika Epoxy, Polyurethane and PMMA flooring systems
Concrete repair and protection EN standards principle and method approach- Suitable for moisture control (Principle 2, method 2.3 of EN 1504-9)
- Suitable for physical resistance (Principle 5, method 5.1 of EN 1504-9)
- Suitable for restoration work (Principle 3, method 3.1 of EN 1504-9).
- Suitable for preserving or restoring passivity (principle 7, method 7.1 and 7.2 of EN 1504-9).
- Suitable for increasing resistivity (Principle 8, method 8.3 of EN 1504-9)
Advantages - Can be overcoated with resin based floor finishes after 24 hours
- Prevents osmotic blistering of resin based floor finishes on damp substrates
- Fast and easy application
- Concrete repair mortar: EN 1504-3:Class R4
- Good levelling properties
- Impervious to liquids, permeable to water vapour
- Freeze thaw and de-icing salt resistant
- Good chemical resistance
- Thermal expansion properties similar to concrete
- Good bond to green or hardened concrete whether damp or dry
- Good early and final mechanical strengths
- Good resistance to water and oils
- Suitable surface for overlaying smooth floor finishes
- Low VOC emissions
- Will not corrode reinforcement steel
Packaging Pre-batched 23 kg units. | Part A | 1.14 kg container | | Part B | 2.86 kg container | | Part C | 19 kg plastic bags |
Refer to current price list for packaging variations Colour Final floor appearance: Smooth, matt finish | Part A-resin | white liquid | | Part B - hardener | transparent yellow liquid | | Part C - filler | natural grey aggregate powder | | Final floor finish colour | light grey |
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Technical Information Compressive Strength | Time | Strength | | 1 day | ~15 N/mm2 | | 7 days | ~50 N/mm2 | | 28 days | ~60 N/mm2 |
Values +23 °C / 50 % r.h.
Flexural Strength | Time | Strength | | 1 day | ~5.8 N/mm2 | | 7 days | ~11.1 N/mm2 | | 28 days | ~14 N/mm2 |
Values at +23 °C / 50 % r.h.
Coefficient of Thermal Expansion
Chemical Resistance Resistant to many chemicals. Contact Sika Technical Services for additional information
Permeability to Water Vapour | µH2O = 252 Equivalent air layer depth for 3 mm thickness: Sd = 0,75 m | (DIN 52615) |
Freeze Thaw De-Icing Salt Resistance | Resistance factor WFT-L 98 % (High) | D-R (SN / VSS 640 461) |
Water Absorption | 0.02 kg·m-2·h-0.5 | (DIN 52617) |
Service Temperature -30 °C to +80 °C for continuous exposure.
Permeability to CO2 | µC02 ≈ 4168 | (SN EN 1062-6) |
Carbonation Resistance Carbonation resistance for 3 mm thickness: R ≈ 12.5 m
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Application Information Mixing Ratio Packaging size: Part A : Part B : Part C = 1.14 kg : 2.86 kg : 19 kg TMB and Self-smoothing screed | Temperature | Mixing Ratio by weight | | +12 °C min. / +25 °C max. | Part A : Part B : Part C = 1 : 2.5 : 17 Parts (A+B) : Part C = 4 kg : 19 kg | | +8 °C min. / +12 °C max. +25 °C min. / +30 °C max. | Part A : Part B : Part C = 1 : 2.5 : 15.8 Parts (A+B) : Part C = 4 kg : 18 kg To improve workability, Part C can be reduced to 18 kg. Never reduce Part C to less than 18 kg |
Concrete patch repair mortar
The standard Sikafloor-81 EpoCem mix can be bulked out with dry quartz sand.
For each 23 kg unit of mixed Sikafloor-81 EpoCem add 5–10 kg of: quartz sand 0.6–1.2 mm and quartz sand 2.0–3.0 mm Final mix will be: 33–43 kg Ambient Air Temperature +8 °C min. / +30 °C max. Layer Thickness | Temporary moisture barrier (TMB) | 2.0 mm min. | | Self-smoothing screed | 1.5 mm min. / 3.0 mm max. | | Concrete patch repair mortar maximum surface area ~3 x 5 cm | 3.0 mm min. / 9.0 mm max. |
Relative Air Humidity 20 % min. / 80 % max. Substrate Temperature +8 °C min. / +30 °C max. Substrate Moisture Content Can also be applied on green or damp concrete with no standing water. Although the system can be applied onto green concrete surfaces (> 24 hours), it is advised to allow at least 3 days for early concrete shrinkage to occur in order to prevent shrinkage cracks from appearing on the TMB / screed surface. Pot Life | Temperature | Time | | +10 °C | ~40 minutes | | +20 °C | ~20 minutes | | +30 °C | ~10 minutes |
23 kg units Values at 75 % R.H Curing Time Once Sikafloor-81 EpoCem is tack free it is possible to apply vapour permeable resin finishes.
For the application of vapour tight resin finishes on Sikafloor-81 EpoCem, allow the substrate moisture content to fall below 4 % and not earlier than: | Substrate Temperature | Waiting Time | | +10 °C | ~48 hours | | +20 °C | ~24 hours | | +30 °C | ~24 hours |
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The above design is only a sample of the options available, for reference purposes only. Our policy of continuous improvement may result in a change of specifications without notice. If any discrepencies might be between the data sheet values and standards, we reserve the rights to make technical changes. Our company will not be held responsible, as all or any of pictures, drawings, weights and dimensions details or other elements in this document are only indicative and must not be considered contractual. Contact our sales team for other specifications or custom made products.
Contact our sales team for other specifications or custom made products.
