Concrete Crack Repairing System

Crack grouting epoxy adhesive, crack seal epoxy adhesive, surface leveling adhesive.

Concrete Crack Sealing Epoxy Adhesive CrackChor 420

Crack Repair Seal Epoxy Adhesive Item # CrackChor 420 &[more]


Crack Repair Seal Epoxy Adhesive

Item # CrackChor 420



Features with high hardness, excellent Polish, strong adhesion, fast curing, easy to bond with the substrate such as concrete, stone, steel. Is a modified epoxy, initial adhesiveness.


Range of Application

Assorted with CrackChor 410 crack grouting adhesive when repairing concrete cracks,

Mainly used for crack sealing and base bonding during processing of repairing the concrete crack and grouting.

Used for steel bar planting at secondary structure part.

Sealing around the steel plate during steel wrap process

Repairing and leveling for the concrete surface



1, Modified epoxy resin, good initial adhesiveness;

2, Low temperature or room temperature curing, fast curing speed;

3, high adhesive strength after curing, good hardness and a certain toughness;

4, Good anti-acid after curing, good performance against moisture water, oil, dust,humidity and weather ageing

5, The cured products have good strength for tension, pressure and bonding


Product Performance

1  Main Performance


Testing project



Gel Performance  according to GB50728-2011 standard


Tensile Strength (MPa)

≥30 Mpa

33.8 Mpa

Tensile modulus of elasticity MPa

3200 Mpa

4194 Mpa


1.2 %

1.27 %

Bending Strength (MPa)

≥45 Mpa

(no fragment damage)

55.2 Mpa

Compressive Strength (MPa)


73.2 Mpa

Bonding Capacity  according to GB50728-2011 standard

Steel-Steel Tensile Shear Strength (MPa)

≥15 Mpa

18.0 Mpa

Steel-Steel bonding tensile strength (MPa)

≥33 Mpa

34.7 Mpa

Steel-Steel T-peeling strength (MPa)



Steel to C45 Concrete cohesive pulling strength (MPa)

≥2.5 Mpa

(Concrete cohesion damage)

3.3 Mpa

Heat transform temperature



Non-volatile content

≥99 %

99.5 %


Processing Flow:

Crack marking → Surface treatment → Embedding the injector → Sealing with adhesive → Sealing inspection → Mixing crack grouting adhesive → Low pressure injection → Hardening → Inspection


Packaging and Logistics

1.  Two components in separate package, Mix ratio (weight) A:B=3:1

2.  Shall be stored in cool (under 25℃), dry and ventilated place, not exceed 1 year.

3.  Toxic free, non dangerous, can be shipped as normal chemical materials.



Shall be stored in a dry, ventilated place and away from fire, Avoid upside down, sun exposure, rain and collide with sharp things.

Must wear protective gloves, if accidentally touched by skin, please clean with acetone or alcohol, and washed by water, if accidentally splashed into the eyes rinse with plenty of water and seek immediate medical attention.

Mixing the adhesive averagely according to recommended ratio and used out within the effect period which is 60 mins under 25℃.


Other sizes:

Steel: 3.7L/5.0L/10L/18L/20L

Plastic: 4L/5L/10L/15L/20L


1KG/set (ratio:2:1)   



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