NCL PU FLEX-2 Two-Component Semi-Flexible Injection Resin

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NCL PU FLEX-2 Two-Component Semi-Flexible Injection Resin  Two-Component Injection Resin NCL Injection Resin


NCL PU FLEX-2 is a low viscosity hydrophobic hydroactive two-part semi-flexible Polyurethane injection resin designed to repair and seal water leakages caused by concrete defects such as cracks, porosity, cold joint, segregation and other imperfections especially in underground infrastructure.

The curing profile of NCL PU FLEX-2 is controllable by altering the Hardener ratio to cope with every site condition. Thus, NCL PU FLEX-2 is suitable for sealing all type of concrete structure with different severity of leakages from minor moisture intrusion to gushing water.

Once cured, NCL PU FLEX-2 forms a permanent watertight seal and excellent barrier against moisture and water penetration caused by hydrostatic pressure.


NCL PU FLEX-2 is a low viscosity Two-part Polyurethane Injection Resin which consists of Part A – Resin/Base and Part B – Hardener. Part A and Part B are pre-mixed before application.

  • Reinforced Concrete Wall & Slab
  • Tunnels and Subway
  • Movement Joint
  • Live crack and Vibratory Structure
  • Basement and Diaphragm Wall
  • Dams
  • Sewerage Structure
  • Water Tank
  • Manhole & Wet Shaft
  • Brickwork
  • Rock and Soil Stabilization
  • Lift Pits
  • Curtain grouting
  • Other Specialized Applications

  • Low viscosity
  • Penetration into cracks <200 microns
  • Excellent bond strength
  • Provides permanent water-resistant barrier
  • Good chemical resistance & Non-corrosive
  • Unaffected by salts or contaminants in water
  • Non-toxic in cured form
  • Solvent and TDI free


Appearance - Dark Brown Liquid Yellowish Liquid
Viscosity mPa.s ~120 ~15
Specific Gravity (at 25 °C) - 1.16 1.02
Flash Point °C >210 >150

   Hardener Dosage (%) Cream Time (second) Rise time (second)
2 88 210
5 50 120
10 40 95
*The reaction time at 25 °C varies with the amount of hardener added. Result may vary depending on site condition.


NCL PU FLEX-2 can be injected using single-line high-pressure injection machine e.g. NCL SWM1000, NCL SWM1100, NCL DHP-M1000 or NCL DHP-M2000. The resin and hardener shall be mixed homogeneously before use. Refer to Method Statement for complete guide.


The hydrophobic injection resin first displace water then react, expand and foams to dense closed-cell semi-flexible watertight seal in concrete structure.


Contents Weight  
Part A : Resin 20 kg / 25 kg / 225 kg  
Part B : Hardener 1 kg / 5kg / 50 kg  


It is recommended to keep container tightly closed in a cool (20 - 25°C), dry and well-ventilated place. Partly used drums/pails should be properly sealed to prevent ingress of moisture. To increase the material life expectancy, partially used drum/pail can be filled with nitrogen gas and sealed tightly to prevent contamination. When the material is stored properly, the shelf life is approximately twelve (12) months from the production date.


Waste disposal should be in accordance with all applicable local and national regulations. Kindly check with the local authorities on proper disposal method. Empty drums/pails should be punctured to clear the content. Care must be taken to prevent environmental contamination from the use of this material.

  • Ingestion: Do not induce vomiting. Treat symptomatically and get medical attention immediately.
  • Inhalation: Remove from exposure. If there is any difficulty in breathing, get medical attention immediately.
  • Skin Contact: Remove contaminated clothing. Immediately flush affected area thoroughly with mild soap and water.
  • Eye Contact: Immediately flood eyes with plenty of water for a minimum of 15 minutes holding the eyes open.
Other Information

All information contain herein was obtained from sources which we believe to be accurate and reliable. The information is subject to change without prior notice. However, it is provided without any warranty, expressed or implied, regarding its correctness. The information is provided for informational purposes and solely for customer’s consideration, investigation and verification. The statements in this information sheet are based on the best of our knowledge and experience. For this and other reasons, NCL Chemical & Equipment Sdn Bhd do not assume responsibility and expressly disclaim liability for loss, damage or expense arising out of or in any way connected with the handling, storage, use or disposal of the material. However, we have no control over the method of application and the amount of care taken when using this product and therefore the liability of NCL Chemical & Equipment Sdn Bhd is limited to the quality of the delivered material. 

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