Hydrophilic Polyurethane Grouts with 12 Months Shelf Life Guarantee

VPU-1 Single Component Waterbrone Hydrophilic Polyurethane Grouting Materials for

           Waterproof Plugging and Reinforcement Repair of Concrete Leakage

Introduction
VPU-1 is a common one-component hydrophilic polyurethane grouting material. The composite

 polyether polyol reacts with the polyisocyanate to form a hydrophilic chemical grouting material

 terminated by isocyanate. It reacts rapidly with water, solidifies and expands the closed crack,

 thereby achieving Quickly stop the water. This product is milky white elastic colloid after reaction

 with water. It has the advantages of high speed, high strength, small shrinkage and strong

 impermeability. It is widely used in waterproof tunneling projects such as subway tunnels, water

 conservancy and hydropower, underground garages and sewers.
Characteristics
1.Low viscosity, quick reaction in water, forming impervious elastic colloidal concretion body by

   reaction with good water sealing performance.
2.Reacting with water, it forms ivory elastic colloidal concretion body, which has the advantages

  of high compressive strength,low temperature resistance,good elasticity and penetration proof

  quality.
3.Good effect on mixing with water. The product can penetrate into crack deeply and the crack can

   be sealed thoroughly by concretion body.
4.Good dilatability,big water content ,good water affinity and groutability,meanwhile the viscosity and

   curing speed can be adjusted according to customer's requirement.
5.It can be widely used in waterproof projects such as DAMS, subway, tunnel etc.

Product Parameters

PU Grouting Materials Type

PU Grouting Step

There are two main types of PU grouting methods: low-pressure injection and high-pressure injection.

The advantage of polyurethane foam injection lies in its ability to enable the liquid polymer to be

injected into the crack. This injection process ensures that the crack is fully saturated with the liquid

polymer until the liquid starts to accumulate on the adjacent surface.
The repair of concrete structures is carried out by injecting a liquid polymer that hardens upon drying.

High-pressure injection is applicable in areas where there is a large amount of water flow, such as

basements,rooftops, swimming pools, and walkways.
First, a hole is drilled into the ceiling of the lower floor. Then, depending on the type of ceiling structure,

the PU grout is injected through this hole using either low or high pressure. Once the grout is injected,

it will expand to fill the voids or cracks that are caused by water damage.
Polyurethane foams are categorized into hydrophilic and hydrophobic types. Both hydrophilic and

hydrophobic foams react with the water present in the crack. Additionally, they can also be mixed

with water just before the injection process.

A hydrophilic foam system will trap any excess water within its structure during the foam formation

process. Both types can be formulated to be flexible, but generally, a hydrophilic system is more

resilient compared to a hydrophobic one.

However, hydrophobic formulations have been developed to be as resilient and flexible as hydrophilic

ones while not being prone to shrinkage over time.
It is crucial to avoid installing gels in expansion joints or cracks that are likely to move. Gels form a

solid material without a cellular structure, which means they cannot disperse tension under

compression. This lack of tension dispersion can cause the gel to split and damage the seal, making

it extremely difficult to repair in the long run.In the present day, grouting will still retain its

significance as one of the simplest, most cost-efficient, and durable repair solutions available.

Scope of Apllication
1.Deformation Joints in Construction Projects
   Deformation Cracks,Construction Joints, Structural Joints,Plugging and Reinforcement of Structural

   Cracks
2.Undergound Tunnel
   Subway Tunnels,Subway Platforms,Highway Tunnels,Railway Subgrade Tunnel Walls
3 Ports and Wharves
   Bridge Piers,Dams,Hydropower Station Curtain Grouting Plugging and Reinforcement
4 Leakage Plugging by Retaining Walls in Geological Driling
   Selective Water Plugging in Oil Exploration and Water Gushing in Mines,etc.

Packaging & Storage