Product Data Sheet
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Sikagard®-720 EpoCem HC

Superfine epoxy-cement sealing mortar

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

  • An ideal surface preparation for the subsequent application of Sika epoxy products.
  • Ideal preparation for smooth surface finishes
  • Minimum delays to follow-up applications of Sika epoxy products.
  • Fast and easy to apply.
  • Impervious to liquids but permeable to water vapour (allows substrate to “breathe”).
  • Excellent adhesion to dry or damp concrete
  • Suitable for interior and exterior use.
  • Solvent-free.
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Product Data Sheet
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Usage

  • As sealing mortar (0.5–2.0 mm) on concrete and mortar.
  • For repairs to fair faced concrete in chemically aggressive environment.
  • As pore sealer on horizontal and vertical surfaces.
  • As temporary moisture barrier.
 

Advantages

  • An ideal surface preparation for the subsequent application of Sika epoxy products.
  • Ideal preparation for smooth surface finishes
  • Minimum delays to follow-up applications of Sika epoxy products.
  • Fast and easy to apply.
  • Impervious to liquids but permeable to water vapour (allows substrate to “breathe”).
  • Excellent adhesion to dry or damp concrete
  • Suitable for interior and exterior use.
  • Solvent-free.

Packaging

Pre-dosed 21 kg sets.

Part A

1.14 kg plastic container

Part B

2.86 kg plastic container

Part C

17 kg ready to mix units

Colour

Part A - resin

White liquid

Part B - hardener

Transparent yellow liquid

Part C - filler

Aggregate powder

Finish colour

Grey

Product Details

Product Information

Composition

Epoxy modified cementitious mortar

Shelf Life

Part A & part B

12 months

Part C

9 months

From date of production if stored in original, unopened and undamaged sealed packaging.

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.

Part A & part B: Protect from frost
Part C: Protect from humidity

Density

2.0 kg/L (at +20° C)

 
System information

System Structure

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

Vertical or horizontal pore filling, repair and levelling:

Layer thickness

0.5–2 mm

Primer

Sikafloor®-80 EpoCem® Primer

Render

Sikagard®-720 EpoCem HC

Top coating

Suitable product from the Sikafloor® and Sikagard® range can be used as soon as the surface humidity of Sikagard®-720 EpoCem HC has reached 4%
Technical Information

Compressive Strength

~40 N/mm²

Tensile Strength in Flexure

~5 N/mm²

Tensile Adhesion Strength

~1.5 N/mm² (concrete failure)

Coefficient of Thermal Expansion

~13.0 x 10-6 1/K

Water Absorption

~0.03 kg/m2 x h0.5 (Coefficient A)

Diffusion resistance to carbon dioxide

µC02  ~5400

(EN 1062–6)

Application

Application Information

Mixing Ratio

Part A : part B : part C - packaging size: 1.14 : 2.86 : 17 kg
Mixing ratio: 1 : 2.5 : 14 - 15 (by weight)

Layer Thickness

0.5 mm min. / 3 mm max.

Ambient Air Temperature

+10 °C min. / +35 °C max.

Substrate Temperature

+10 °C min. / +35 °C max.

Pot Life

~30 min (+30 °C)
Consumption

Consumption

~2.0 kg/m² for 1 mm layer thickness.
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.
Application steps

MIXING

Prior to mixing, shake part A (white liquid) briefly until homogenous, then pour into the container of part B and mix well for at least 30 seconds.
Pour the mixed binder (A+B) into a suitable mixing container (capacity of about 30 liters) and gradually add part C while stirring with a power mixer. Mix thoroughly for 3 minutes until a uniform mix has been achieved, with no lumps.

 

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

Place mixed Sikagard®-720 EpoCem HC onto the matt damp substrate and spread evenly to the required thickness with a trowel or spatula. If necessary, it may be finished with a moist neoprene sponge or brush.
It is not permitted to use additional water, which would disturb the surface finish and cause discoloration.

CLEANING OF TOOLS

Mixing and application tools must be cleaned with water. Hardened material can only be mechanically removed.

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