EP 320

Solvent-free, Low Viscosity Epoxy Resin for Crack Injection


EP 320 is a two-component, epoxy resin based crack injection system, designed for sealing cracks in concrete. It is recommended for grouting of 0.10 mm to 10 mm wide cracks, cold joints and other such undesirable cracks.

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• Excellent bond strength
• High elastic modulus ensures effective transfer of stresses at bond interface
• Pre proportioned to give consistent performance
• Due to its low viscosity grouting can be done to air line cracks
• Resistant to a wide range of chemicals and liquids


The concrete surface must be hard, sound and free of dust and other barrier materials such as paint, lime coatings, plaster, curing agents, laitance, adhesive residues, etc., 2 - 3 cm on either side of the crack that will inhibit adhesion to the substrate.

Use appropriate pneumatic drills for making suitable holes and fix the nipples or injection packers. Ensure the holes are free from debris and laitance before fixing the packers or nipples.

Use suitable adhesive for fixing surface port or nipples in position. The distance of ports or the nipples depends on the crack severity and the nature of the structure but with maximum centre-to-centre distance of 800 mm. Close the whole length of crack opening using suitable adhesive.


The individual component of EP 320 should be thoroughly stirred before being mixed together. The entire content of Part A should be poured into a large vessel so that the Part B can be accommodated. Mix the two component thoroughly to ensure a smooth and consistent mix is achieved.


The mixed EP 320 is injected / grouted into cracks / joints using the suitable equipment.

The suitable equipment shall be a low pressure, air operated injection equipment or hand operated cartridge gun or a syringe depending on the location and size of the crack. Grout / inject in each port or nipple that are fixed earlier to the application.

Inject in each port or nipple (keeping all others closed except the next immediate one). When the EP 320 start coming out of the next port / nipple, close it and continue injection / grouting until the pressure is maintained for 1 - 5 minutes.

Close the port, disconnect the pump and continue this process until all the ports / nipples are injected / grouted similarly.

After 24 hours remove all the nipples / ports and fill the resulting cavity with suitable epoxy adhesive.


Once the mixed material has exceeded its pot life the viscosity and the characteristics of the product changes and any unused product should be discarded at this time.


EP 320 can be removed from tools and equipment by using CLI RTC 100 immediately after use. Any hardened material will need to be removed mechanically.


The values shown are typical of results obtained in the laboratory at 27 ± 1ºC. Actual performance values obtained on site may vary from those quoted


EP 320

@ 27 ± 1ºC


Pale yellow liquid

Pot life

45 Minutes

Mixed density

1. 05 - 1.15gm/cc


250 ± 50 cps

Application limits

0.1 mm - 10 mm

Tack free time

6 Hours

Compressive Strength (ASTM C579)

24 hours

>55 N/mm²

7 days

>60 N/mm²

Shrinkage, ASTM C881


Full Chemical Cure

7 days


Pack size Coverage


The coverage

Part A 750g

depends on the

Part B 250g

substrate, width of the crack / void to be grouted, loss and


Part A 3kg

waste and porosity of

Part B 1kg

the substrate


EP 320 has a shelf life of 12 months if kept in a dry, store between 5ºC and 30ºC in the original unopened containers. The product should be protected from frost, away from direct sunlight and sources of heat.


In case of contact with the eyes, rinse immediately with plenty of water and seek medical advice and after contact with the skin wash immediately with plenty of soap and water (do not use solvents). Prolonged contact with the skin should be avoided, especially where the user has an allergic reaction to epoxide materials. Always wear gloves and eye/face protection is necessary. Observe personal hygiene, particularly washing the hands after work has been completed or at any interruption whilst work is in progress. Care should be taken when removing gloves to avoid contaminating the insides. In case of accidents seek medical advice.


Spillage of any of the accelerating admixer product should be removed with plenty of water. Disposal of such product or empty packaging should be in accordance with local waste disposal authority regulations.


Sold subject to the Company's conditions of sale which are available on request.


The information supplied in this datasheet is based upon extensive experience and is given in good faith in order to help you. Our Company policy is one of continuous Research and Development; we therefore reserve the right to update this information at any time without prior notice. We also guarantee the consistent high quality of our products; however as we have no control over site conditions or the execution of the work, we accept no liability for any loss or damage which may arise as a result thereof.