Product Data Sheet Show all documents

Sikagard®-720 EpoCem® IN

3-part cement and epoxy combination pore filler and levelling mortar

Sikagard®-720 EpoCem® IN is a 3-part, epoxy modified, cementitious, thixotropic, fine textured mortar for levelling and finishing concrete, mortar or stone surfaces.

  • Improved chemical resistance compared to PCC mortars
  • Good protection of concrete in aggressive environments
  • Waterproof
  • Vapour permeable
  • Application range 0.5–3 mm on vertical and horizontal surfaces
  • Good adhesion to green, damp or dry concrete
  • Easy and fast application
  • Contains no solvents
  • Fast overcoating of Sika® resin-based finish products
  • Good surface finishing
  • Does not require overcoating
  • Manual and machine application (wet spray technique)
Product Data Sheet Show all documents

Usage

Sikagard®-720 EpoCem® IN may only be used by experienced professionals.   
  • Thin layer render
  • Concrete pore filler/ levelling mortar
  • Repairing minor defects (pores and honeycombed concrete)
  • Protecting concrete in aggressive and chemical environments
  • As a Temporary Moisture Barrier (TMB) for Sikafloor® or Sikagard® resin products
  • Suitable for moisture control (Principle 2, method 2.3 of EN 1504-9)
  • Suitable for restoration work (Principle 3, method 3.1 and 3.3 of EN 1504-9).
  • Suitable for physical resistance (Principle 5, method 5.1 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)
  • For interior and exterior use
 

Advantages

  • Improved chemical resistance compared to PCC mortars
  • Good protection of concrete in aggressive environments
  • Waterproof
  • Vapour permeable
  • Application range 0.5–3 mm on vertical and horizontal surfaces
  • Good adhesion to green, damp or dry concrete
  • Easy and fast application
  • Contains no solvents
  • Fast overcoating of Sika® resin-based finish products
  • Good surface finishing
  • Does not require overcoating
  • Manual and machine application (wet spray technique)

Packaging

Part A+B+C pre-batched

18.5 kg set

Part A1 kg container

Part B

2.5 kg container

Part C

15 kg bag

Colour

Part A+B+C mixedLight grey paste

Part A

White liquid

Part B

Translucent white liquid

Part CLight grey powder

IMPORTANT: When cured 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

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 +40 °C. Part A, Part B: Protect from frost. Part C: Protect from humidity.

Density

Part A+B+C mixed~2.01 kg/L

Part A

~1.08 kg/L

Part B

~1.01 kg/L

Part C (bulk density)

~1.155 kg/L

All density values at +30 °C.
System information

System structure

IMPORTANT: The system structures as described must not be changed.

Substrate types

  • Green concrete (as soon as mechanical preparation is possible)
  • Damp concrete (> 14 days old)
  • Damp aged concrete (rising moisture)

Temporary moisture barrier (TMB)

  • Sikagard®-720 EpoCem® IN Thickness: 2.0 mm minimum

Pore filling, repair and levelling

  • Sikagard®-720 EpoCem® IN

Coating finishes

  • Suitable product from the Sikafloor® and Sikagard® range
Technical Information

Compressive strength

Curing time, +27 °C

Compressive strength

1 day~20 N/mm2
3 days~25 N/mm2

7 days

~30 N/mm2

14 days

~40 N/mm2

Tensile adhesion strength

≥ 4 N/mm2 (7 days, +27 °C)

(EN 1542)

Service temperature

0 °C to +80 °C for continuous exposure

Application

Application Information

Mixing ratio

Part A : Part B : Part C = 1 : 2.5 : 15 (by weight)

Layer thickness

Temporary moisture barrier (TMB)2.0 mm min.
Pore filling, repair and levelling0.5 mm min. / 3.0 mm max.
Pore filling and repairing small areas (< 0.01 m2)5.0 mm max.

Ambient air temperature

+10 °C min. / +40 °C max.

Substrate temperature

+10 °C min. / +40 °C max.

Pot life

~35 minutes (100 g mass at +27 °C)

Setting time

Temperature

Full cure

+15 °C

~14 days

+25 °C

~7 days

+35 °C~4 days

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

Waiting time / Overcoating

Once Sikagard®-720 EpoCem® IN is tack free it is possible to apply vapour permeable resin finishes.
For the application of vapour tight resin finishes on Sikagard®-720 EpoCem® IN, allow the surface moisture to fall below 4 % and not earlier than:

Temperature

Time

+10 °C

~60 hours

+20 °C

~15 hours

+30 °C~8 hours

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Consumption

Consumption

~2.0 kg/m2 per mm
This figure is theoretical and does not allow for any additional material required due to surface porosity, surface profile, variations in level or wastage, etc.
Application steps

EQUIPMENT

Select the most appropriate equipment required for the project:

Substrate preparation equipment

  • Abrasive blast cleaning equipment
  • Planing machine
  • Scarifying machine
  • High pressure water blasting equipment
  • Mechanical hand held tools for breaking out concrete

For other types of preparation equipment, contact Sika Technical Services.

Mixing equipment

IMPORTANT: Do not use free fall mixers.

  • 18 kg: Electric single paddle mixer (300–400 rpm) with helical paddle
  • Upto 54 kg: Electric double paddle mixer (300–400 rpm) with helical paddle or forced action / rotating pan / double paddle or trough type mixer (300–400 rpm).
  • Scraper
  • Clean mixing containers (capacity ~30 L)

For other types of mixing equipment, contact Sika Technical Services.

Application equipment: TMB

Mixed material carrier

  • Pin leveller
  • Trowels
  • Spiked roller

Manual application equipment: Pore filling, repair and levelling

  • Mixed material carrier
  • Plasterers hawk
  • Trowel

Sprayed application equipment: Repair and levelling

  • Aliva Hopper gun
  • Putzmeister S-5 
  • Graco T-Max 405

For other types of spraying equipment, contact Sika Technical Services.

Finishing equipment

  • Trowel (PVC or wooden)
  • Sponge

MIXING

Manual application or Wet spray application

IMPORTANT: Mix full units only

IMPORTANT: Do not add water

  

  1. Before mixing, shake Part A (white liquid) briefly until uniformly mixed.
  2. Pour mixed Part A into Part B container and shake vigorously for at least 30 seconds.
  3. Pour the mixed liquid (Parts A+B) into the mixing container.
  4. Stir Parts A+B slowly in the container with the mixing equipment and gradually add Part C.
  5. Mix for a further 3.0 minutes until a uniform lump free mix has been achieved.

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.

  

IMPORTANT: Freshly applied Sikagard®-720 EpoCem® IN must be protected from damp, condensation and water for at least 24 hours.

IMPORTANT: When Sikagard®-720 EpoCem® IN is tack free, it is possible to apply vapour permeable coatings. When applying vapour impermeable coatings, always verify the surface moisture content is ≤ 4 %.

IMPORTANT: For external applications, apply product on a falling temperature. If applied during rising temperatures “pin holing” can occur.

IMPORTANT: Prevent premature drying by protecting from strong winds and do not expose to direct sun light while in an unhardened condition.

IMPORTANT: Do not applying under extreme conditions (high temperature and low humidity) which can cause fast drying of the product.

IMPORTANT: When overlaying with PMMA screeds, the wet surface of Sikagard®-720 EpoCem® IN during application must be fully broadcast with kiln dried quartz sand 0.4–0.7 mm granulometry.

IMPORTANT: The TMB effect in Sikafloor® EpoCem® is limited in time, without additional preparation. Contact Sika Technical Services for additional information.

  

Note: Sikagard®-720 EpoCem® IN can be applied on green or damp concrete, without any standing water.

  

Note: Although the product can be applied onto green concrete (> 24 hours), it is advised to allow at least 3 days for early concrete shrinkage in order to prevent concrete shrinkage cracks from appearing on the mortar surface.

  

Manual application

  1. Thoroughly pre-wet the prepared substrate before application.
  2. Before application remove excess water, e.g. with a clean sponge. The surface must have a dark matt appearance and surface pores and cavities must not contain water.
  3. When used as a pore filler or levelling mortar, firmly scrape the mortar over the substrate to fill any pores or cavities.
  4. Apply the levelling or repair mortar on to the substrate between the minimum and maximum layer thicknesses without the formation of voids. A seamless finish can be achieved if a “wet” edge is maintained during application.

  

Sprayed application - Wet Spray

  1. Thoroughly pre-wet the prepared substrate before application.
  2. Before application remove excess water, e.g. with a clean sponge. The surface must have a dark matt appearance and surface pores and cavities must not contain water.
  3. Place the wet mortar into the spraying equipment and apply on to the substrate between the minimum and maximum layer thicknesses without the formation of voids. A seamless finish can be achieved if a “wet” edge is maintained during application.

  

Surface finishing

IMPORTANT: Do not add water during the surface finishing as this can cause discolouration and cracking.

  1. Allow mortar to surface harden.
  2. Surface finish to the required surface texture using trowel and / or sponge.

CLEANING OF TOOLS

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

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