Sika Sikagard 720 EpoCem
Sika Sikagard 720 EpoCem
Sikagard®-720 EpoCem HC is a three-part epoxy modified cementitious fine-textured mortar with thixotropic properties, designed for levelling, pore sealing and finishing of concrete and mortar surfaces. It serves as an ideal base preparation for Sika epoxy systems, with layer thickness 0.5–3 mm, consumption approx. 2.0 kg/m² per mm, application temperature +10°C to +35°C, and pot life approx. 30 minutes.
Product Overview
Sikagard®-720 EpoCem HC is a three-part, epoxy modified cementitious thixotropic fine-textured mortar designed for levelling, pore sealing and finishing of concrete and mortar surfaces. It combines the chemical resistance of epoxy resin with the breathability of cementitious mortar — impervious to liquids but permeable to water vapour (allows the substrate to "breathe"). It provides excellent adhesion to both dry and damp concrete. Solvent-free formula suitable for interior and exterior use.
Key Features
- Epoxy modified cementitious formula — combines chemical resistance with breathability
- Three-part pre-dosed packaging for accurate mixing
- Thixotropic — suitable for vertical and horizontal surfaces
- Excellent adhesion to dry or damp concrete (≥1.5 N/mm²)
- Impervious to liquids but permeable to water vapour
- Fine, smooth surface finish — ideal base for subsequent epoxy coatings
- Solvent-free formula
- Minimum delays to follow-up applications of Sika epoxy products
- Suitable for interior and exterior use
Applications
- Sealing mortar — Pore sealing on concrete and mortar surfaces (0.5–2.0 mm thickness)
- Chemical-resistant repairs — Fair-faced concrete repairs in chemically aggressive environments
- Horizontal and vertical pore sealing — Base preparation for subsequent coating systems
- Temporary moisture barrier — Temporary moisture protection during construction
- Base for Sika epoxy systems — Ideal substrate preparation for Sikafloor® and Sikagard® products
Why Choose Sikagard 720 EpoCem
Sikagard®-720 EpoCem HC combines the strength of epoxy resin with the breathability of cementitious mortar, overcoming the vapour barrier issue of traditional epoxy products. The three-part pre-dosed packaging ensures accurate mix ratios, and its thixotropic formula prevents sagging on vertical surfaces. As a base mortar for Sika epoxy coating systems, it provides a smooth, uniform substrate and minimises waiting time between operations — a critical component of professional concrete surface finishing and protection systems.
Packaging
Pre-dosed 21 kg set: Part A (resin) 1.14 kg + Part B (hardener) 2.86 kg + Part C (aggregate) 17 kg
Consumption Guide
| Item | Value |
|---|---|
| Consumption (per mm thickness) | Approx. 2.0 kg/m² |
| Layer thickness | Min. 0.5 mm, max. 3 mm |
Above figures are theoretical. Actual consumption depends on substrate porosity, surface profile and wastage.
Technical Specifications
| Property | Value |
|---|---|
| Chemical Base | Epoxy modified cementitious mortar |
| Components | Three-part (A: resin / B: hardener / C: aggregate) |
| Mixing Ratio (by weight) | 1 : 2.5 : 14–15 |
| Finished Colour | Grey |
| Density | 2.0 kg/L (at +20°C) |
| Compressive Strength | Approx. 40 N/mm² |
| Tensile Strength in Flexure | Approx. 5 N/mm² |
| Tensile Adhesion Strength | Approx. 1.5 N/mm² (concrete failure) |
| CO₂ Diffusion Resistance | μCO₂ ≈ 5400 (EN 1062-6) |
| Water Absorption Coefficient | Approx. 0.03 kg/m² × h⁰·⁵ |
| Application Temperature (ambient & substrate) | +10°C to +35°C |
| Pot Life | Approx. 30 minutes (at +30°C) |
| Shelf Life | Part A & B: 12 months; Part C: 9 months (unopened, original sealed packaging) |
Important Notes
- Substrate must be sound with minimum compressive strength of 25 N/mm² and minimum pull-off strength of 1.5 N/mm²
- Substrate can be damp but must be free of standing water and contaminants (oil, grease, etc.)
- Ensure good ventilation when working in confined spaces
- Freshly applied mortar must be protected from moisture, condensation and rain for at least 24 hours
- For external applications, apply primer and Sikagard®-720 EpoCem HC on a falling temperature; "pin holing" can occur during rising temperatures
- Static cracks must be pre-filled with Sikadur® or Sikafloor® epoxy resin; dynamic cracks (>0.4 mm) require separate assessment
- Do not add extra water — this will cause surface discolouration
- Re-check surface moisture content if more than 5–7 days have passed since application
FAQ
Can Sikagard 720 EpoCem be used on damp concrete?
Yes. Sikagard®-720 EpoCem HC provides excellent adhesion to both dry and damp concrete. The substrate can be moist but must be free of standing water.
What is the consumption per square metre for Sikagard 720 EpoCem?
The theoretical consumption is approximately 2.0 kg/m² per mm of layer thickness. With a layer thickness range of 0.5–3 mm, consumption is approximately 1.0–6.0 kg per square metre depending on the required thickness.
How long can the mixed material be used?
The pot life at +30°C is approximately 30 minutes. Lower temperatures extend the working time, but prompt use after mixing is still recommended.
