Polyurethane Crack Injection
Effective Waterproofing with Crack Injection
Crack injection in buildings is a critical waterproofing method used to prevent water from entering the building through cracks formed during or after construction. Especially where positive waterproofing is not possible, negative side injection techniques can effectively stop water ingress.
Leaking concrete structures can be permanently repaired using polyurethane resin. Polyurethane resin forms a waterproof foam when in contact with water, filling concrete cracks and stopping water leakage. Polyurethane resins are available in rigid, semi-rigid, flexible and semi-flexible foam forms. The chemical expansion of these resins is extremely effective in filling concrete cracks.
Crack Repair with Polyurethane (PU) Injection
Polyurethane injection (PU injection) is a special technique used to stop water seepage through cracks and repair water damage to walls, concrete joints and floors. PU injections are divided into one-component and two-component products:
- Single Component Products: Used when water is present in the application area. These products vary with flexible, semi-flexible, rigid and semi-rigid foam structures. One-component products are ideal for instantly stopping the flow of water.
- Two-Component Products: Known as non-foaming products and are used for permanent sealing. These products stop water leakage by creating a permanent barrier over cracks. For high-volume cavities or cavities, two-component products can be preferred for cost advantages. In addition, these products can also be applied by one-component injection, extending container life.
With the wide range of products offered by PURIN, you can find solutions suitable for all types of structures. With PU injection, you can both stop water leaks and make your structures long-lasting and safe.
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Application Areas
- Concrete Structures:
o Tunnels
o Dams
o Mines
o Basement floors
o Water and sewage tanks
o Parking lots
o Underground structures - Walls and Floors:
o Concrete joints
o Cracked walls
o Floors subject to water damage - Civil and Structural Engineering Projects:
o Bridges
o Civil engineering structures
o Industrial and residential buildings
o Water retention structures
o Soil stabilization
Advantages
- Fast and Permanent Solution:
o Polyurethane resin expands rapidly when in contact with water to form a waterproof barrier, permanently stopping water leaks. - Flexible Application Options:
o One-component and two-component product options offer flexible solutions according to the application area and conditions. - High Performance:
o Rigid, semi-rigid, flexible and semi-flexible foam forms adapt to all types of concrete cracks and show high performance. - Environmentally Friendly:
o With its low VOC content, it provides effective waterproofing without harming the environment. - Economical and Efficient:
o Polyurethane injection offers an economical solution by reducing both labor and material costs. - Long Lasting Protection:
o Prevents corrosion of concrete and reinforcement by stopping water ingress in cracks, extending the life of the structure.
Injection on Dilatation Joints
| Products | Viscosity (cP,23ºC) | Mixing Rate | Structure | Starting of Reaction | Ending of Reaction | TDS |
|---|---|---|---|---|---|---|
| PURINSEAL EN 101 | 550 | 10% Catalyst | Forms a flexible, closed-cell foam when in contact with water. | 20 sec | 150 sec | |
| PURINSEAL EN 105 | 400 | 10% Catalyst | Forms a very flexible, closed-cell foam when in contact with water. | 10 sec | 100 sec |
|
| PURINSEAL EN 106 | 400 | 5% Catalyst | Forms a very flexible, closed-cell foam when in contact with water. | 10 sec | 70 sec |
|
| PURINSEAL EN 113 | 100 | 10% Catalyst | Forms a flexible, closed-cell foam when in contact with water. | 10 sec | 90 sec |
|
| PURINSEAL EN 115 | 200 | 5% Catalyst | Forms a semi-rigid foam when in contact with water. | 5 sec | 75 sec | |
| PURINSEAL EN 116 | 200 | 5% Catalyst | Forms a semi-rigid foam when in contact with water. | 18 sec | 95 sec | |
| PURINSEAL EN 401 | 250 | 1:1 | Forms a water-tight, flexible elastomeric gasket (70 shore A) | Pot Life: 40 min | Pot Life: 40 min | |
| PURINSEAL EN 406 | 580 | 1:1 | Forms flex foam when in contact with water and forms a flex elastomeric gasket in anhydrous environment. | 5 sec | 230 sec | |
| PURINSEAL EN 450 | 200 | 1:1 | Forms a very flexible, closed-cell foam, foaming reaction only takes place in direct contact with water | 15 sec | 80 sec |
Our products used in dilatation joints are as followed:
If there is a lot of water in dilatation joints one-component products; if there is no water present or it is like a leakage two-component products are preferred.
Injections in Cracks
Our products used in cracks are as followed:
One-component products are applied with one component injection machines. Two component products are applied with two component injection machines and they can also be applied with one component injection machines by expanding the pot life. All one component products can be used to stop water in crack injections, and afterwards PURINSEAL EN 401 or PURINSEAL EN 404 is used.
| Product | Viscosity (cP,23ºC) |
Mixing Rate | Structure | Starting of Reaction | Ending of Reaction | TDS |
|---|---|---|---|---|---|---|
| PURINSEAL EN 101 | 550 | 10% Catalyst |
Forms a flexible, closed-cell foam when in contact with water. | 20 sec | 150 sec | |
| PURINSEAL EN 105 | 400 | 10% Catalyst |
Forms a very flexible, closed-cell foam when in contact with water. | 10 sec | 100 sec |
|
| PURINSEAL EN 106 | 400 | 5% Catalyst |
Forms a very flexible, closed-cell foam when in contact with water. | 10 sec | 70 sec |
|
| PURINSEAL EN 112 | <100 | 5% Catalyst |
Forms a semi-rigid foam when in contact with water. | 10 sec | 135 sec | |
| PURINSEAL EN 113 | 100 | 10% Catalyst |
Forms a flexible, closed-cell foam when in contact with water. | 10 sec | 90 sec |
|
| PURINSEAL EN 115 | 200 | 5% Catalyst |
Forms a semi-rigid foam when in contact with water. | 5 sec | 75 sec | |
| PURINSEAL EN 116 | 200 | 5% Catalyst |
Forms a semi-rigid foam when in contact with water. | 18 sec | 95 sec | |
| PURINSEAL EN 301 | 150 | Without Catalyst |
Forms a semi-rigid foam when in contact with water. | 20 sec | 140 sec | |
| PURINSEAL EN 401 | 250 | 1:1 | Forms a water-tight, flexible elastomeric gasket (70 shore A) | Pot Life: 40 min | Pot Life: 40 min | |
| PURINSEAL EN 404 | 350 | 1:1 | Forms rigid foam when in contact with water and forms a rigid elastomeric gasket in anhydrous environment. | 20 sec | 140 sec | |
| PURINSEAL EN404S | 350 | 1:1 | Forms rigid foam when in contact with water and forms a rigid elastomeric gasket in anhydrous environment. | 50 sec | 500 sec | |
| PURINSEAL EN 406 | 580 | 1:1 | Forms flex foam when in contact with water and forms a flex elastomeric gasket in anhydrous environment. | 5 sec | 230 sec | |
| PURINSEAL EN 450 | 200 | 1:1 | Forms a very flexible, closed-cell foam, foaming reaction only takes place in direct contact with water | 15 sec | 80 sec |
EN 101
EN 105
EN 106
EN 112
EN 113
EN 114
EN 115
EN 116
EN 301
EN 401
EN 402
EN 403
EN 404
EN 404s
EN 405
EN 406
EN 450
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