Product Data Sheet Show all documents

Sikafloor®-82 Epocem HC

3-PART CEMENT AND EPOXY COMBINATION MORTAR FOR SELF-SMOOTHING FLOOR SCREEDS OF 3 TO 7 MM

Sikafloor®-82 Epocem HC is a three part, epoxy modified cementitious, fine textured mortar for self-smoothing floor screeds in layers of 3 to 7 mm.

  • Can be over coated with resin based floors after 24 hours (+20 °C, 75% r.h.)
  • Prevents osmotic blistering of resin based coatings over damp substrates
  • Easy application
  • Good levelling properties
  • Impervious to liquids but permeable to water vapour
  • Good chemical resistance
  • Thermal expansion properties similar to concrete
  • Excellent bond to green or hardened concrete whether damp or dry
  • Excellent early and final mechanical strengths
  • Excellent resistance to water and oils
  • It is the ideal preparation for smooth surface finishes
  • For internal use
  • Contains no solvents
  • Will not corrode reinforcement steel
Product Data Sheet Show all documents

Usage

As a Temporary Moisture Barrier (TMB) (3 - 7 mm thick) allowing the application of Epoxy, Polyurethane and PMMA* resin floors requiring dry substrates, over high moisture content substrates, even green concrete, for a lasting solution. As a self-smoothing screed for:
  • Levelling or patching horizontal concrete surfaces, in new work or repairs, in aggressive chemical environments
  • Floor topping on non-ventilated damp substrates without particular aesthetic requirements
  • Levelling layer under Epoxy, Polyurethane and PMMA* floor coatings / screeds, tiles, sheet floors, carpets or wooden floors
  • Repair and maintenance of monolithic and vacuum concrete floors
 

Advantages

  • Can be over coated with resin based floors after 24 hours (+20 °C, 75% r.h.)
  • Prevents osmotic blistering of resin based coatings over damp substrates
  • Easy application
  • Good levelling properties
  • Impervious to liquids but permeable to water vapour
  • Good chemical resistance
  • Thermal expansion properties similar to concrete
  • Excellent bond to green or hardened concrete whether damp or dry
  • Excellent early and final mechanical strengths
  • Excellent resistance to water and oils
  • It is the ideal preparation for smooth surface finishes
  • For internal use
  • Contains no solvents
  • Will not corrode reinforcement steel

Packaging

Pre-batched 31 kg units.

Part A

1.14 kg plastic container

Part B

2.86 kg plastic container

Part C

27 kg plastic bags

Colour

Part A-resin:

White liquid

Part B - hardener

Turbid yellowish liquid

Part C - filler:Natural grey aggregate powder
Colour:Light grey
Finish Colour:Matt grey

Product Details

Product Information

Chemical Base

Epoxy modified cementitious mortar.

Shelf Life

Part A, part B:

12 months

Part C:9 months

Storage Conditions

The product must be stored in original, unopened and undamaged sealed packaging, in dry conditions at temperatures between +18 °C and +30 °C.

Part A, part B:

Protect from frost and direct sunlight
Part C:Protect from humidity and direct sunlight

Density

Part A~1.05 kg/l (at +20 °C)

Part B

~1.03 kg/l (at +20 °C)

Mixed resin

~1.97 kg/l (at +20 °C)
Mixed A+B+C:~2.10 kg/l (at +20 °C)
Technical Information

Abrasion Resistance

H22/1000/1000

(at ± 27 °C / 75 % r.h.)

7 days

~2.3 gram

Compressive Strength

± 27 °C / 75 % r.h.

1 day

~20 N/mm2

7 days~40 N/mm2

28 days

~45 N/mm2

Tensile Strength in Flexure

± 27 °C / 75 % r.h.

1 day

~4.0 N/mm2

7 days~8.0 N/mm2

28 days

~11.0 N/mm2

Tensile Adhesion Strength

7 days

~1.5 N/mm2

(concrete failure)

Application

Application Information

Mixing Ratio

Part A : part B : part C - packing size : 1.14 : 2.86 : 27 kg
Flooring Screed:
At temperatures between +18 °C to +25 °C:
1 : 2.5 : 23.7 (by weight)
Parts (A+B) : C = 4 kg : 27 kg

The amount of part C can be reduced to 26 kg in order to improve workability.

Please note:

Never reduce part C by more than this amount.
1 : 2.5 : 22.8 (by weight)
Parts (A+B) : C = 4 kg : 26 kg
For this application, to achieve a good bond of the mortar to the substrate,
SikaTop®-Armatec®-110 EpoCem® must be used as a primer. Apply the mortar wet on wet to the primer.

Layer Thickness

3.0 mm minimum / 7.0 mm maximum
If Sikafloor®-82 Epocem HC is used as a Temporary Moisture Barrier (TMB), a minimum of 3 mm must be applied.

Ambient Air Temperature

+8 °C min. / +30 °C max.

Relative Air Humidity

20% min. / 80% max.

Substrate Temperature

+8 °C min. / +30 °C max.

Substrate Moisture Content

Can be applied on green or damp concrete, without any standing water.
Although the product can be applied onto green concrete surfaces (> 24 hours), it is advised to allow at least 3 days for early shrinkage of concrete to occur in order to prevent concrete shrinkage cracks from appearing on the screed surface.

Pot Life

Temperature / R.H 75%

Time

+10 °C

~50 minutes

+20 °C

~25 minutes

+30 °C~12 minutes

31 kg units

Curing Time

Once Sikafloor®-82 Epocem HC is tack free it is possible to apply vapour permeable seal coats.
For the application of vapour tight coatings on Sikafloor®-82 Epocem HC, allow the surface moisture to fall below 4%, not earlier than:

Substrate Temperature

Waiting Time

+10 °C

~3 days

+20 °C

~1 day

+30 °C~1 day
Consumption

Consumption

Primer

SikaRepair® EpoCem Modul HC or Sikafloor-80 EpoCem® Primer

(~0.3 kg/m2)

Self smoothing screed:

Sikafloor®-82 Epocem HC

~2.25 kg/m2/mm

~6.75 kg/m2 for a 3 mm thick application (minimum for T.M.B.).

These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level or wastage, etc.
Application steps

MIXING

Prior to mixing, shake part A (white liquid) briefly until homogenous, then pour into container of part B and shake vigorously again for at least 30 seconds. When dosing out of drums, stir and homogenise first.
Pour the mixed binder mixture (A+B) into a suitable mixing container (capacity of about 30 litres) and gradually add part C to the mixer while stirring with a power mixer. Mix thoroughly for 3 minutes until a uniform mix has been achieved with no lumps.
Mix only full units of A+B+C components. Do not mix smaller amounts. Do not add water.
When dosing with additional aggregates, add them after adding part C to the mix. Mix thoroughly for 3 minutes until a uniform mix has been achieved.

Mixing Tools:

Mix using a slow speed electric mixer (300 - 400 rpm) with helical paddle or other suitable equipment.
For mixing 2 – 3 bags at once, single or counter rotating double mortar (basket type) and forced action (pan type) mixers are also recommended. Free fall mixers must not be used.

APPLICATION

Place mixed Sikafloor®-82 Epocem HC onto the primed substrate and spread evenly to the required thickness uniformly with a rubber or metal trowel or spatula to and immediately roll with a spike roller to remove entrapped air and obtain an even thickness layer.
Workability can be adjusted by varying slightly the amount of Part C.
See Mixing above
Do not use additional water, which would disturb the surface finish and cause discolouration.
A seamless finish can be achieved if a “wet” edge is maintained during application.

 

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.

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