Low viscosity crack injection compound.

Two component, solvent free, low viscosity modified epoxy.


A crack injection compound for cracks between 0.10 and 0.05 mm in width. It is also suitable for gravity feed applications subject to crack width and depth, for better penetration consider the injection process. May also be used as primer for epoxy mortars and electrical encapsulation.

  • Stabilizes cracks in concrete
  • Insulates and tamper proofs electrical fittings
  • See properties of dry film
Surface Preparation

Concrete should be clean and dry. Surfaces should be sound enough to provide sufficient strength for bonding of injection nipples and surface seal.

Bonding / Priming



Add the entire contents of the activator can to the base material. Stir for five minutes using a flat paddle. If only a small quantity is required, pre-stir the contents of each container using separate flat paddles. Pour two volumes of base component and one volume of activator into a separate, clean container. Mix together for five minutes using a flat paddle.



Primer: 1 ℓ/m2/1 mm thick

Crack: estimation of cavity volume is necessary


Properties of Wet Material
Mixing ratios 2:1 by volume
Density (typical) 1.12 g/cm³
Colour: Base: Light amber liquid
Activator: Brown liquid
Flash point  + 120 °C
Dilution Do not dilute
Consistency Very low viscosity
Toxicity Uncured material is toxic
Shelf life 2 years from date of manufacture
Finish Gloss
Storage conditions Under cover in cool conditions
Packaging 500 ml, 5 ℓ kits
Fire resistance Flammable


Properties During Application
For injection
As a primer
By gun
By brush or roller
Pot-life @ 25 °C 5 hours – 500 ml
Volume solids 100%
Curing time @ 25 °C Practical cure: 24 hours
Full cure: 7 days
Coverage Variable – 1 ℓ covers 1 m² to a thickness of 1 mm
Application temperature range 10 °C to 45 °C
Equipment clean-up Uncured material is toxic
Equipment clean-up abe® super brush cleaner
Fire resistance Flammable

Properties of Dry Film
Maximum service temperature Dry: 60 °C
Wet: 40 °C
Bond strength Concrete will fail in tensile and shear
Compressive strength 60 MPa
Toxicity Cured material is non-toxic
Colour Brown

Full details are contained in the ‘Crack Injection Data Sheet’.

Note: epidermix® 389 is recommended for use in cracks from 0.10 to 0.05 mm. For wider cracks, see epidermix® 365.


abe®super brush cleaner before dried/cured.

Protection on Completion

Ensure no liquid spillage and no movement vibration until cured.

Temperature & Relative Humidity

See “Properties of wet material” and “Properties during application”.

Model Specification

Low-viscosity epoxy crack injection compound and primer for epoxy mortars.

The crack injection compound shall be epidermix® 389, a two component, low viscosity, solvent free epoxy compound applied in accordance with the manufacturers recommendations, epidermix® 389 is supplied in 500 ml and 5 ℓ metal containers.

Handling & Storage

This product has a shelf life of 24 months if kept in a dry cool place in the original packaging.

In more extreme conditions this period might be shortened.

Health & Safety

Wet epidermix® 389 is toxic and flammable. Always ventilate the working area well during application and drying. Avoid flames in vicinity. Always wear gloves and eye protection when working with the material and avoid excessive inhalation and skin contact. If material is splashed in the eye, wash with copious quantities of clean water and seek medical attention.

Cured epidermix® 389 is inert and harmless.

When transporting by aircraft, ask for a material safety data sheet.

Important Note

This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot accept any liability for application – because a.b.e.® has no direct or continuous control over where and how a.b.e.® products are applied.

Further Information

Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total requirements.

a.b.e.® has a wealth of technical and practical experience built up over the years in the company’s pursuit of excellence in building and construction technology.