Comtech Seal PU1 is a one-part polyurethane injection resin that flows easily; it reacts with water to create a semi-rigid, water-repellent seal.
TYPICAL PROPERTIES:
- Colour: Transparent brown liquid.
- Free expansion: up to 3500 %
- Density: 1.02-1.1 g/cm³
- Viscosity: 250 mPa.s at 25ºC
AREA OF APPLICATION:
Water sealing of cracks and significant gaps in walls, floors, and concrete constructions. It reacts quickly to semi-rigid PU foam when contacted with water.
ADVANTAGES:
- Forms a permanent, high-strength seal in cracks or joints.
- Fast-reacting semi-rigid PU foam used as a water stop for sealing of leakages or to stop active water leaks with a high flow and/or high hydrostatic pressure.
- Penetrates deep into fine cracks.
- Does not shrink after curing.
- Non-toxic when contacted with drinking water.
- Excellent adhesion to mineral construction materials (such as Concrete, cement, and brick), metal, and certain plastics.
- It is chemically resistant to water, weak acids and alkalis, mineral oils, fungi and bacteria, ground water, sea water, and petroleum products.
APPLICATION METHOD:
- Clean surfaces.
- Drill injection holes.
- Insert injection packers.
- Flush crack, if necessary
- Injection using single-component grouting equipment.
- Cleanup
STORAGE & PACKING: 4- and 10-L tin.
The product should be stored in a dry, shaded area, protected from breakage, deterioration, and contamination. The shelf life is up to 12 months in unopened condition when stored as recommended.




