FOX EPOTHANE® ISO-CRACK EP-2K is an epoxy-polyurethane based, two-component, 100% solids flexible crack bridging membrane. Formulated to prevent cracks from reflecting through to the surface in FOX BAU TERRAZZO coating systems, it is recommended for application to interior concrete surfaces prior to floor installation.
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Product Description
FOX EPOTHANE® ISO-CRACK EP-2K is an epoxy-polyurethane based, two-component, 100% solids flexible membrane. It has been specially developed for FOX BAU TERRAZZO coating systems to prevent cracks from reflecting through to the surface. Thanks to the unique adhesion and elongation properties of the resin, it delivers outstanding crack bridging performance, providing 140–160% elongation at break to accommodate horizontal surface movement. Its plasticiser-free flexible resin structure ensures long-term flexibility. It offers high adhesion strength to concrete and steel, excellent chemical resistance, and superior resistance to cold weather conditions. The product is applied on interior concrete surfaces prior to floor installation, as well as for crack bridging over existing cracks before subsequent coatings.
Key Benefits
- Prevents reflective cracking, ensuring the long-term durability of the coating system.
- 100% solids content results in low odour during application and improved workplace safety.
- 140–160% elongation at break effectively absorbs horizontal surface movements.
- Plasticiser-free flexible resin structure provides excellent long-term flexibility.
- High adhesion strength to concrete and steel creates a reliable bridging layer.
- Suitability for localised repairs offers a flexible and economical on-site solution.
Advantages
- 100% solids for low odour and workplace safety during installation.
- Provides excellent adhesion.
- Has excellent chemical resistance.
- Absorbs movement to prevent reflective cracking.
- Has excellent cold weather resistance.
- Manufactured from flexible resins and contains no plasticisers, providing excellent long-term flexibility.
- Flexible and resistant to abrasion.
- Has crack bridging capability.
- High adhesion strength.
- Suitable for localised repairs.
Usage Areas
- In interior and exterior spaces
- In airports
- In hospitals
- In galleries
- In shopping centres
- In supermarkets
- In shops and showrooms
- Crack bridging beneath FOX BAU TERRAZZO COATING systems in hotels
- Crack bridging over existing cracks prior to subsequent coatings
Application Steps
- 1
Surface Preparation
Concrete substrates to be coated must be sound and have adequate compressive strength (minimum 25 N/mm²); tensile strength must be at least 1.5 N/mm², moisture content a maximum of 4%, and substrate temperature a minimum of +10°C. Care must be taken to ensure the substrate is at least +3°C above the dew point. The surface must be clean, dry, and free from all dirt, oil, grease, coatings, release agents, cement residues, laitance, loose particles, and cured membranes.
- 2
Priming
Surfaces to be coated must be primed in advance with a FOX EPOTHANE® series primer. Substrate temperature (min. +10°C) must be strictly observed. FOX EPOTHANE® ISO-CRACK EP-2K must be applied over the primer within the pot life.
- 3
Mixing
Mix component A thoroughly using an electric mixer (300–400 rpm) with an epoxy/polyurethane mixing paddle until a homogeneous colour is achieved and no product remains on the bottom or sides of the container. Then add component B entirely into component A and mix continuously for 3–4 minutes. Avoid excessive mixing to minimise air entrainment.
- 4
Coating Application
FOX EPOTHANE® ISO-CRACK EP-2K is poured onto the surface and applied evenly in a single coat using a notched trowel or squeegee. 20–25 minutes after application, FOX PROMAT 69 mesh fabric is embedded into the surface and rolled over with a roller.
- 5
Tool Cleaning
Tools and equipment used must be cleaned after application with solvents such as FOX CS810 or FOX C380. Once FOX EPOTHANE® ISO-CRACK EP-2K has cured, it can only be removed from surfaces by mechanical means.
Concrete surfaces to be coated must be at least 3 weeks old. Ambient and surface temperature must be a minimum of +10°C and a maximum of +30°C.
After application is complete, the coating must be protected from direct water contact for at least 24 hours. In the event of water contact, softening and blistering will occur on the coating surface; the coating will need to be completely removed and reapplied.
Relative humidity must be a maximum of 80%. Attention must be paid to dew point and condensation. The substrate temperature must be above +10°C.
Mixing must be carried out using an electric mixer at 300–400 rpm with an epoxy/polyurethane mixing paddle. Failure to use the specified mixing paddle will cause air entrainment into the product, resulting in air bubbles on the coating surface after application.
Surfaces to be coated with FOX EPOTHANE® ISO-CRACK EP-2K must have been previously primed with a FOX EPOTHANE® series primer.
20–25 minutes after application of FOX EPOTHANE® ISO-CRACK EP-2K, FOX PROMAT 69 mesh fabric must be embedded into the surface and rolled over with a roller.
Materials to be used should be brought to the application site 1–2 days in advance and allowed to acclimatise to ambient conditions.
In cold weather, the ambient and substrate temperature should be raised; products should be kept at +20°C – +25°C to bring them to application readiness.
Rain, dust, wind, animals, and insects must be prevented from coming into contact with the coating while it is still fresh.
The product must be stored in its original unopened packaging, between +10°C and +30°C, away from direct sunlight, in a cool and dry environment, protected from frost. Shelf life is 6 months from the date of manufacture.
It is dangerous to approach storage and application areas with open flames. Protective clothing, gloves, goggles, and a mask must be worn during application. Contact with skin and eyes must be avoided; in case of contact, wash thoroughly with plenty of water and soap. If swallowed, seek medical attention immediately.
Consumption figures are given for ideal conditions assuming an ambient and surface temperature of 20°C. It should be noted that consumption will increase on uneven surfaces and in cold weather conditions.
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