Product Description

SL-669 is a hydrophilic single-component foamed polyurethane. It reacts rapidly with water, expands and seals cracks to achieve water stopping. It can also be used with a small amount of catalyst to adjust the foaming speed according to actual construction needs for leakage stoppage.

SL-669 reacts with water to form a water-stop gel, which provides both water sealing and crack-filling functions.SL-669 can be mixed with water at ratios of 1:1, 1:5, even 1:12.

Advantages

1. 1.Low viscosity: No clogging in high-pressure grouting lines due to increasing viscosity during application; easy to construct and operate.
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3. 2.Excellent water miscibility: Prevents residual water inside cracks, which may damage the foam and cause secondary leakage.
   
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5. 3.Good reactivity: Reacts and solidifies with water in approximately 20–120 seconds.
   
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7. 4.Good stability: Remains usable within the construction period after opening; unopened product can be stored for more than 6 months without deterioration.
   
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9. 5.Excellent adhesion to concrete: No delamination from concrete, good bonding performance.
   
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11. 6.Can react with acidic, alkaline or even seawater without affecting the physical and chemical properties of the foam.
    
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13. 7.High structural strength, high toughness, and long-term water resistance.
    

Disadvantages

1. 1.Low shrinkage: If the foam does not completely fill the cracks, secondary leakage may easily occur. It is recommended to perform 2–3 additional grouting runs after the first foaming to fill voids and reduce dry shrinkage.
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3. 2.Foaming expansion ratio is about 15–20 times. It is recommended to use with hydrophobic products to increase the expansion ratio.
   

Hardening Characteristics

1. 1.The expanded body resists weak acids and weak alkalis, and is compatible with asphalt joint fillers, concrete, etc.
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3. 2.SL-669 single-component water-stop agent is most suitable for applications below groundwater level, with long-term water resistance and hydrophilicity.
   

Scope of Application

1. 1.Filling dry and wet cracks in concrete components, tightly fitting all contact surfaces.
2. 2.Stopping water leakage.
3. 3.Filling wet joints.
4. 4.Injecting into cracks with pressurized underground water flow: can be used with catalyst to form foam within 3 seconds, and fully expand and solidify within 2 minutes after contacting water.

Product Characteristics

1. 1.Immediately reacts upon contact with water, encapsulates water, expands and solidifies.
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3. 2.Low expansion rate, high toughness.
   
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5. 3.Strong adhesion to substrates and good chemical resistance (resists drinking water, seawater, wastewater, diluted acidic and alkaline chemicals).
   
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7. 4.Non-toxic after full reaction.
   
   
   
   

Storage Stability

Packaging