DH ACRYLIC SEAL is an acrylate system two-liquid type mixed curing water-stop material and back face grouting agent which was developed making much of safety and durability, which forms a gel type with especially excellent elasticity, permeability, swelling property, durability, etc., which is used for back face injection like tunnel, subway, building basement, secret, etc., and which exhibits water-stop effect and ground settling agent effect. As it has no leaching of gel, a weak point of the existing water glass, and is safe even under the environment in the ground, it has semi-permanent durability and is not a toxic and polluting product.



  • Excellent permeability: It is easy to permeate into the fine air gap or any kind of soil due to the very low viscosity near the water density.
  • Stability: It exhibits no leaching phenomena, the weak point of the existing water glass, and no hydrolysis senile change.
  • Complete impermeable layer: The highly elastic and flexible gel formed after condensation has the swelling property when in contact with water by absorbing vibration and the elastic reaction to the secondary deformation of ground and structure resulting in continuously maintaining water barring capacity
  • Excellent workability: It is possible to freely respond according to the site condition and injection objective because it has a wide range of controlling the curing time.
  • Non-toxic environment-friendliness: It is long safe to all sorts of chemical environment of underground water and ground as it is not decomposed and leached by alkalis, acids, organic chemicals.
  • Bondability : It maintains the water stop effect for a long time due to excellent properties of high elasticity and high bondability

Applied parts:
It can be used for stopping water for leakage of all sorts of architecture, civil structure.

– Water stop of underground structural connection and back face grouting
– Permanent water stop grouting of underground structure like tunnel, subway, etc.
– Expansion joint leaking part and construction joint leakage repair
– Connection and leaking part of reservoir, swimming pool, pond, etc.
– Air gap part of concrete structure
– Leaking part of underground parking lot and underground concrete structure

DH Acrylic Gel System

Example diagram of back face injection method

This method is the one to stop water by forming a non-permeable wall on the back face of concrete wall. It is to inject DH Acrylic Seal after boring the concrete with leaking parts, which forms a nonpermeable water stopping wall in an air gap between concrete and soil.
DH Acrylic Gel System Classification

DH Acrylic Seal back face injection method
DH ACRYLIC SEAL forms a stopping wall as it sufficiently penetrates into all cracks by injecting and penetrating into the range with a radius of 60cm when installing the injection openings with distance of 100cm according to the cracks due to its equal penetration from the opening.


DH Acrylic seal construction procedure

DH_11. Perforation
You should select the location to be perforated as evading the cut location of iron bar by referring to the non-destructive inspection or design drawing. The wall should be bored with drill (14mm), and the ceiling With drill (10mm),and the waterproofing sheet should be perforated with the air gap distance of 1,000㎜ along the enter of defect locations without any damage on it. Where there is much water gushing from the hole when boring you should take measures such as installation of temporary weep drain or inducement to a fixed location.
DH_12. Installation of Injection Opening
In case of general back face injection, Packer (10-100mm,14-120mm) should be used, and in case of much water leakage, PVC pipe with valve can be used. After cleaning foreign matters inside the bored hole with air compressor and water you should seal it with rapid curing mortar and Epoxy Putty after installing Packer for high pressure injection or injection pipe. In order to prevent the leakage and pressure loss of liquid chemical when injecting liquid chemical you should seal the repair part and the defect concrete location by use of rapid curing mortar and Epoxy Putty.
DH_13. Check on injection equipment
As DH ACRYLIC SEAL is a product with a very short pot life which is supplied with agent A and agent B classified it should be injected by the two- component type pumping. Check thoroughly the equipment condition of injection pump before the injection operation, and check whether agent A and agent B are mixed and discharged rightly .Fill agent A and agent B respectively prescribed by the equipment exclusively for injecting liquid chemical in the container.
DH_14. Liquid chemical prescription of DH Acrylic Seal
Start the injection by connecting the injection nozzle with injection opening. The injection order to inject in the wall after injecting in the ceiling should be in principle, when injecting in the wall the injection should be made in the order from the lower part to the upper one, and if the outflow of Dh acrylic seal from the upper one is identified during injecting in the lower part, shut the injection opening and the injection opening being injected and seal them. As the above method continue to inject DH Acrylic Seal in all the injection openings. (In case of much water leakage control the curing time and use it by adding the accelerator in agent A.)
5. Finish work
If the water stopping is completed adjust the injection pipe or Packer to the surface of structure removes it by cutting. Finish with mortar after making the surface smooth with grinder, and then paint it if necessary.

DH Acrylic Seal Mixing Method

DH-30 Minimum Ratio









DH-50 Minimum Ratio