Product Data Sheet Show all documents

Sikafloor®-82 EpoCem®

Epoxy-cement hybrid for self-smoothing floor screeds (3 to 7 mm)

Sikafloor®-82 EpoCem® is a three part, epoxy modified cementitious, fine textured mortar for self-smoothing floor screeds in layers of 3 to 7 mm. It allows the application of epoxy, polyurethane and PMMA resin floors over high moisture content substrates or green concrete.

  • 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 to apply
  • Good levelling properties
  • Impermeable to liquids
  • Vapour permeable
  • Resistance to frost and de-icing salt
  • Good resistance to chemicals
  • Thermal expansion properties similar to concrete
  • Good adhesion to green or hardened damp concrete
  • Excellent early and final mechanical strengths
  • High resistance to water and oils
  • It is the ideal preparation for smooth surface finishes
  • Will not corrode reinforcement steel
Product Data Sheet Show all documents

Usage

The Product is used as a:
  • Temporary Moisture Barrier (TMB)
  • Self smoothing wearing screed without aesthetic requirements
  • Levelling screed under Sikafloor® resins and floor coverings
  • Patching screed for horizontal concrete repairs
Please note:
  • The Product may only be used for interior applications.
  • The Product may only be used by experienced professionals.
 

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 to apply
  • Good levelling properties
  • Impermeable to liquids
  • Vapour permeable
  • Resistance to frost and de-icing salt
  • Good resistance to chemicals
  • Thermal expansion properties similar to concrete
  • Good adhesion to green or hardened damp concrete
  • Excellent early and final mechanical strengths
  • High resistance to water and oils
  • It is the ideal preparation for smooth surface finishes
  • Will not corrode reinforcement steel

Packaging

Part A

1.05 kg container × 2

Part B

2.63 kg container × 2

Part C

23.12 kg bag × 2

Part A + Part B + Part C pre-batched

26.8 kg × 2 ready to mix unit

Colour

Final floor appearance: Smooth, matt finish

Part A

white liquid

Part B

translucent white liquid

Part C

grey powder

Final floor finish colour

matt grey

Note: When the 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 Product.

Product Details

Product Information

Chemical base

Epoxy modified cementitious mortar

Shelf life

Part A and Part B

12 months from date of production

Part C

9 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.

Refer to the current Safety Data Sheet for information on safe handling and storage.

Density

Part A

~1.08 kg/L

Part B

~1.03 kg/L

Part A+B+C mixed~2.20 kg/L

All density values at +30 °C
Technical Information

Compressive strength

Time

Strength at + 23°C / 50 % r.h.

1 day

≥ 15 N/mm2

28 days

≥ 45 N/mm2

Flexural strength

Time

Strength at + 23°C / 50 % r.h.

1 day

≥ 2 N/mm2

28 days

≥ 10 N/mm2

Freeze thaw de-icing salt resistance

Resistance factor WFT-L 86% (High)

(VSS-40464)

Carbonation resistance

Carbonation resistance for 8 mm thickness: R ≈ 24.2 m

Application

Application Information

Mixing ratio

At temperatures between +12 °C to +25 °C:

Part A : Part B : Part C (by weight)

1 : 2.5 : 22 (by weight)

Part A + Part B : Part C

4 kg : 25 kg

At temperatures between +8 °C to +12 °C and +25 °C to +30 °C:

The amount of part C can be reduced to 24 kg in order to improve workability. Never reduce part C by more than this amount.

Part A : Part B : Part C (by weight)

1 : 2.5 : 21 (by weight)

Part A + Part B : Part C

4 kg : 24 kg

Note: 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

Maximum

7 mm

Minimum

3 mm

Note: If the Product is used as a Temporary Moisture Barrier (TMB), a minimum of 3 mm must be applied.

Product temperature

Maximum

+30 °C

Minimum

+8 °C

Ambient air temperature

Maximum

+30 °C

Minimum

+8 °C

Relative air humidity

Maximum

80 %

Minimum

20 %

Substrate temperature

Maximum

+30 °C

Minimum

+8 °C

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 / 75 % r.h.

Time

+10 °C

~50 minutes

+20 °C

~25 minutes

+30 °C

~12 minutes

 

Curing time

Once Sikafloor®-82 EpoCem® is tack free it is possible to apply vapour permeable seal coats.

For the application of vapour tight coatings on Sikafloor®-82 EpoCem®, 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

Sikafloor®-80 EpoCem® Primer

~0.2-0.3 kg/m2

ScreedSikafloor®-82 EpoCem®

~2.25 kg/m2/mm

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

Note: Consumption data is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.
Application steps

EQUIPMENT

MIXING EQUIPMENT

  • Electric double paddle mixer (>700 W, 300 to 400 rpm)

  • Alternatively pan type revolving or forced action mixers can be used.

APPLICATION EQUIPMENT

  • Smoothing trowel

  • Spiked roller

SUBSTRATE QUALITY

IMPORTANT

Incorrect treatment of cracks

The incorrect assessment and treatment of cracks may lead to a reduced service life and reflective cracking.

  

TREATMENT OF JOINTS AND CRACKS

Construction joints and existing static surface cracks in substrate require pre-treating before full layer application. Use Sikadur® or Sikafloor® resins.

SUBSTRATE CONDITION

Cementitious substrates (concrete / screed) must be structurally sound and of sufficient compressive strength (minimum 25 N/mm2) with a minimum tensile strength of 1.5 N/mm2.

 

SUBSTRATE PREPARATION

MECHANICAL SUBSTRATE PREPARATION

IMPORTANT

Exposing blow holes and voids

When mechanically preparing the surface, make sure to fully expose blow holes and voids.

  1. Remove weak cementitious substrates.
  2. Prepare cementitious substrates mechanically using abrasive blast cleaning or planing / scarifying equipment to remove cement laitance.
  3. Before applying thin layer resins, remove high spots by grinding.
  4. Use industrial vacuuming equipment to remove all dust, loose and friable material from the application surface before applying the Product.
  5. Use products from the Sikafloor®, Sikadur® and Sikagard® range of materials to level the surface or fill cracks, blow holes and voids.

Contact Sika® Technical Services for additional information on products for levelling and repairing defects.

SUBSTRATE PREPARATION OF NON-CEMENTITIOUS SUBSTRATES

For information on substrate preparation of non-cementitious substrates, contact Sika technical services.

MIXING

IMPORTANT

Addition of water

Do not add water to the mix or for finishing as this will affect the performance, surface finish and cause discolouration.

IMPORTANT

Unsuitable mixing equipment

Do not use free fall mixers.

IMPORTANT

Avoid over-mixing to minimise air entrainment.

  1. Mix Part A (resin) for ~10 seconds with an electric double paddle mixer (300–400 rpm, > 700 W).
  2. Add Part B (hardener) to Part A.
  3. Mix for a further 2 minutes until a uniform mix is achieved.
  4. While mixing Parts A + B, gradually add the Part C.
  5. Mix continuously for 3 minutes, until a uniform mix is achieved.
  6. To ensure thorough mixing, pour materials into another container and mix again to achieve a smooth and uniform mix.
  7. 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.
 

APPLICATION

IMPORTANT

Strictly follow installation procedures

Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

IMPORTANT

Protect from moisture

After application, protect the Product from damp, condensation and direct water contact for at least 24 hours.

IMPORTANT

Ventilation in confined spaces

Always ensure good ventilation when applying the Product in a confined space.

IMPORTANT

Pin holes

If the Product is applied on porous substrates during rising temperatures, pin holes may form from rising air.

  1. Apply the Product during falling temperatures.

IMPORTANT

Do not use curing compounds

Applications under extreme conditions (high temperature and low humidity) which can cause fast drying of the product must be avoided as the product does not allow the use of curing compounds.

IMPORTANT

Protect fresh Product from direct sunlight and draughts

To reduce the risk of cracking, protect freshly applied product from high ambient temperatures, direct sunlight and draughts.

  1. Pour the mixed Product onto the substrate. Note: The consumption is specified in Application Information.
  2. Apply the Product evenly over the surface with a trowel.
  3. Back roll the surface in two directions at right angles with a spike roller. Note: Maintain a "wet edge" during application to achieve a seamless finish.

Overcoating with PMMA

Note: When overlaying with PMMA screeds, the Product surface must be fully broadcast with clean and dry quartz sand.

Moisture barrier

Note: The TMB effect is limited in time without additional preparation. Always verify the surface moisture content if more than 5 days have passed since application.

 

CLEANING OF TOOLS

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

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