Polygrout - Water Reactive Polyurethane Grout

Polygrout is a single component highly effective, hydrophobic grout based on polyurethane. Upon contact with water, it reacts to form a closed-cell, semi-rigid foam expanding its volume by 3000%.

Key Features

Does not create new cracks
Inert after curing, constant volume, no shrinkage
Good adhesive strength, tolerant of movement
Excellent bond to surfaces
Foam increases in volume to fill cavities and voids
Deep penetration into very small cracks
Negative side application possible

Technical Specifications

Form	Liquid Type
Color	Dark Brown
Solubility in Water	Hydrophobic
Density	1.18 g/ml
Viscosity	100-200
Max. Expansion (25°C)	2,700% (Ratio 10:1 Resin: Water)
Induction Time (25°C)	15 sec (Ratio 2:1 Resin: Water)
Gel Time (25°C)	110 sec (Ratio 2:1 Resin: Water)
Tensile Shear Strength (23°C)	4 N/mm²
Appearance	Light Yellow Polyurethane Foam
Corrosiveness	Non-Corrosive
Chemical Resistance	Resistant to most organic Solvent, Mild Acids, Alkali

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About Polygrout PU Resin

CrackExperts Polygrout is a hydrophobic grout based on polyurethane. Upon contact with water, it reacts to a closed-cell, semi-rigid foam while expanding its volume up to 3000%.

The cured material maintains a constant volume and is not affected by water or dryness, ensuring the reacted material does not shrink or swell.

Areas of Application

Soil stabilization - Strengthening weak or water-saturated soil
Tunnels, Dams, Subway (Metro), Sewers, Manholes, Utility boxes - Sealing water ingress in underground structures
Pipe intrusions, Waste water tanks - Waterproofing around pipe penetrations
Concrete joints, Limestone, Brick construction - Sealing joints and cracks
Defective concrete (cracked or honeycombed) - Repairing structural defects

Application Process

Check Crack Area - Check crack area and clean up the surface with a wire brush or grinder.
Drill Holes - Drill holes near cracks using a hammer drill, with a 45° angle from the surface, to prevent packers from penetrating through a crack.
Position Zigzag & Distance - Hole positions must be zigzag, with a separation gap of 15-20 cm from each other.
Keep 15-20cm Distance - Make holes as per the recommended pattern, each separated by gap of 15-20 cm from each other.
Insert Packers - Insert packers into the drilled holes and fasten them tightly using a T-wrench.
PU Injection (Polygrout) Prep - Pour the PU Injection (Polygrout) into the plastic bottle.
Connect the Coupler - Connect the grease coupler with the installed packer. Inject first at the low area, and then move to the upper area (down to up).
Inject PU Resin - Push the switch for the running machine and inject PU resin into a hole. Start with low pressure and increase. When PU resin flows out from the cracks, stop injection, move to another packer, and start injection again.
Remove Packers - After finishing injection, remove packers by hitting them with a hammer. Clean the surface using a scraper or a grinder, and if needed, coat with sealing materials. Damaged areas can be sealed with polymer modified mortar.
Clean the Machine - Clean the machine properly using xylene thinner. Pour the Xylene thinner in the jar of the grouting machine and follow the cleaning procedure.

Shelf Life

Up to 3 months for reuse on opening the seal, provided the material is kept in a closed container free from moisture.
Stored at a temperature of 0 to 30°C from date of import.
1 Year in tightly sealed container.