Sikagard®-720 EpoCem® IN

3-part cement and epoxy combination micro mortar for surface sealing

No image available

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

  • Improved chemical resistance compared to PCC mortar
  • Excellent protection of concrete in aggressive environments
  • Easy and fast application
  • Impervious to liquids but permeable to water vapour
  • Excellent bond to green or hardened concrete whether damp or dry
  • Fast overcoating of Sika® resin-based finish products
  • Ideal preparation for smooth surface finishes
  • For internal or external use
  • Contains no solvents
  • Can be applied by hand or mechanically by spray pump machine
Product Data Sheet Show all documents

Overview

Usage

  • As a levelling layer over concrete and mortars in 1 - 3 mm on vertical or horizontal surfaces,
  • Application in new works or damaged concrete repairs, in aggressive chemical environments
  • Application over high moisture content substrates, even green concrete
  • As a Temporary Moisture Barrier (TMB) (min. 2 mm thick) under Epoxy, Polyurethane and PMMA* resin coatings requiring dry substrates, for a lasting solution.
  • As a pore sealer for the re-profiling, smoothing and levelling of concrete surfaces
  • In the food industry, as a levelling and smoothing layer for walls and covings, prior to the application of a suitable Sika® epoxy or PUR finish
 
  • 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)

Advantages

  • Improved chemical resistance compared to PCC mortar
  • Excellent protection of concrete in aggressive environments
  • Easy and fast application
  • Impervious to liquids but permeable to water vapour
  • Excellent bond to green or hardened concrete whether damp or dry
  • Fast overcoating of Sika® resin-based finish products
  • Ideal preparation for smooth surface finishes
  • For internal or external use
  • Contains no solvents
  • Can be applied by hand or mechanically by spray pump machine

Packaging

Part A+B+C Pre-batched

18.50 kg x 2 sets

Part A1.00 kg plastic container

Part B

2.50 kg plastic container

Part C

15.0 kg bag

Colour

Part A

White liquid

Part B

Translucent yellowish liquid

Part CCement grey powder

Part A+B+C mixed

Grey

Product Details

Composition

Epoxy modified cementitious mortar

Shelf life

6 months from date of production

Storage conditions

Store 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

~1.08 kg/L

Part B

~1.01 kg/L

Part C

~1.155 kg/L (Bulk density)

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

All density values at +30°C

System structure

The system configuration as described must be fully complied with and may not be changed.

Primer as indicated below is suitable for each of these substrates:

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

 
Vertical or horizontal pore filling, repair and levelling:

Layer thickness

1 - 3 mm

Primer

Water saturation with matt, damp appearance

Render

Sikagard®-720 EpoCem® IN

Top coatingcan be left un-coated or suitable product from the Sikafloor® and Sikagard® range can be used as soon as the surface humidity of Sikagard®-720 EpoCem® IN has reached 4%

Compressive strength

1 day≥ 20 N/mm2
3 days≥ 25 N/mm2

7 days

≥ 30 N/mm2

14 days

≥ 40 N/mm2

Curing temperature +27° C

Tensile adhesion strength

> 4 N/mm2 (after 7 days at +27° C)

(DIN EN 1542)

Service temperature

0°C to +80°C for continuous exposure.

Application

Mixing ratio

Part A : Part B : Part C = 2 : 5 : 30 (by weight)

Layer thickness

Minimum

1 mm

Maximum

3 mm

Special cases - Isolated and confined small areas (< 0.01 m2)

upto 5 mm

Ambient air temperature

+10°C min. / +40°C max.

Relative air humidity

20% min. / 80% max

Substrate temperature

+10°C min. / +40°C max.

Pot Life

~35 minutes (100 g mass at +27°C)

(FIP 5.1)

Waiting time to overcoating

Once Sikagard®-720 EpoCem® IN is tack free it is possible to apply vapour permeable seal coats.

For the application of vapour tight coatings on Sikagard®-720 EpoCem® IN, allow the surface moisture to fall below 4%, not earlier than:

Substrate Temperature

Waiting Time

+10°C

~60 hrs

+20°C

~15 hrs

+30°C~8 hrs

Note: Times are approximate at 75% R.H. and will be affected by changing ambient and substrate conditions, particularly temperature and relative humidity.

Curing treatment

Applied Product ready for use

Temperature

Full cure

+15°C

~ 14 days

+25°C

~ 7 days

+35°C~ 4 days

Note: All cure times are approximate and will be affected by changing substrate and ambient conditions.

Setting time

TemperatureFull Cure

+15°C

~14 days

+25°C

~7 days

+35°C

~4 days

All cure times are approximate and will be affected by changing substrate and ambient conditions.

Consumption

Primer:
Water dependent on substrate absorbency.

Screed / Mortar / Render: ~2.0 kg/m2/mm

This figure is theoretical and does not include for any additional material required due to surface porosity, surface profile, variations in level or wastage, etc.

MIXING

Prior to mixing, shake part A (white liquid) briefly until homogenous, then pour into the container of part B and shake vigorously for at least 30 seconds. When dosing out of drums, stir and homogenize first.

Pour the mixed binder (A+B) into a suitable mixing container (capacity of about 30 litres) and gradually add part C while stirring with a power mixer. 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 suitable. Free fall mixers must not be used.

APPLICATION

Hand application:

Place mixed Sikagard®-720 EpoCem® IN onto the matt-damp substrate and spread evenly to the required thickness with a trowel or spatula. When necessary, it may be finished with a moist neoprene sponge or brush.

  

Mechanical application:

Application on to the surface can also be done using hopper gun or wet spray technique. For example an Aliva Hopper gun, a Putzmeister S-5 or a Graco T-Max 405. Subsequent finishing by hand is required.

Do not use additional water, which would disturb the surface finish and cause discolouration.

Freshly applied Sikagard®-720 EpoCem® IN must be protected from rain for at least 24 hours.

Once Sikagard®-720 EpoCem® IN is tack free it is possible to apply vapour permeable seal coats. Always verify that surface moisture < 4% when applying vapour tight coatings.

A seamless finish can be achieved if a “wet” edge is maintained during application.

Note:
Sikagard®-720 EpoCem® IN 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/render surface.

CLEANING OF EQUIPMENT

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

Documents