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  2. Sikafloor-81 EpoCem, Multi-use floor mortar smooth finish, easy application, Interior & Exterior, Grey, 23 kg
Sikafloor-81 EpoCem, Multi-use floor mortar smooth finish, easy application, Interior & Exterior, Grey, 23 kg

Sikafloor-81 EpoCem, Multi-use floor mortar smooth finish, easy application, Interior & Exterior, Grey, 23 kg

Cement & Mortar
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 23 kg
Usage Temporary moisture barrier, self-smoothing screed, levelling or patch repairing horizontal floors
Usage Area Interior & Exterior
Color Grey
Chemical Base Epoxy modified cementitious mortar
Storage Conditions +5 °C to +30 °C - Store in original, unopened, undamaged packaging in dry conditions. Always refer to packaging
Density 2.03 g/cm³
Application Thickness 3 mm >< 9 mm
Ambient Air Temperature +8°C >< +30°C
Substrate Temperature +8°C >< +30°C
Working time 20 - 25 minutes
Waiting Time 20 - 25 minutes
Consumption 2.25 kg/m²/mm

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
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 - fillernatural grey aggregate powder

Final floor finish colour

light grey
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

15.2×10-6 1/K

(EN 1770)

Reaction to Fire

A2(fl) S1

(EN 13501-1)

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
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