MC-Injekt 2600
Single-Component Hydrophilic Polyurethane Foam Injection Resin for Water-Bearing Crack and Joint Sealing
Authorized Project Distributor — MC-Bauchemie India | Space Arc Engineering, Ghaziabad
Product Overview
MC-Injekt 2600 is a single-component isocyanate-terminated polyurethane prepolymer injection resin manufactured by MC-Bauchemie for hydrophilic (water-reacting) pressure grouting of actively leaking cracks, construction joints, pipe penetrations, and annular gaps in concrete structures where an impermeable, flexible, and permanently water-resistant seal is required. The product reacts with water — including flowing water in active leaks — to produce a flexible closed-cell polyurethane foam that expands to fill the void, crack, or joint and forms a permanent, elastic waterproof seal. Unlike rigid injection resins (epoxy or polyurethane rigid grades) which are suitable only for dry or damp cracks where the goal is structural consolidation, MC-Injekt 2600 is specifically designed for wet and actively leaking conditions: the presence of water is required for the product to react and set, making it the injection material of choice for wet construction joints, gushing cracks in basement walls and tunnel linings, leaking pipe entry collars, and joints in water retaining structures. The hydrophilic expansion mechanism means that the foam expands rapidly on contact with water, filling the full void volume including irregular crack geometries and branching cracks that a low-expansion resin would not fully penetrate. The flexibility of the cured foam (Shore A hardness typically 20 to 40, behaving as an elastic seal rather than a rigid plug) is critical for joints and cracks that continue to move after injection — a flexible injection resin accommodates the movement without cracking and re-opening, while a rigid injection resin would fracture under the same cyclic movement. MC-Injekt 2600 is injected using standard low-pressure injection equipment through pre-drilled and packers-fitted injection ports, typically at 500 to 700 mm spacing along the crack or joint, using an injection pressure not exceeding 3 to 5 bar in most applications. Space Arc Engineering supplies MC-Injekt 2600 for waterproofing injection contractors, tunnel maintenance teams, and infrastructure repair specialists across Delhi NCR, Ghaziabad, Noida, and Uttar Pradesh.
Applications
- Actively leaking construction joint injection — basement walls, tunnel linings, and underground car parks
- Water-bearing crack injection in concrete — flowing water cracks in basements, dams, and retaining walls
- Pipe penetration collar sealing — leaking entry points of pipes through concrete walls and slabs
- Annular gap grouting around tunneling shields and pipe jacking installations
- Expansion joint backing and sealing — flexible hydrophilic seal in movement joints under water pressure
- Pre-injection waterproofing of construction joints in new underground structures before concrete placement
Key Advantages
- Reacts with water — works in active leaks and wet cracks without pre-drying the substrate
- Flexible cured foam — accommodates joint and crack movement without re-cracking the seal
- Hydrophilic expansion — foam expands to fill irregular crack geometries and branching voids completely
- Single-component — no two-component mixing required — simpler equipment and faster site operation
- Fast reaction — sets within minutes of contact with water — reduces injection programme duration
- German engineering — MC-Bauchemie MC-Injekt series used in major tunnel and underground projects worldwide
Technical Data
| Type | Single-component hydrophilic isocyanate polyurethane prepolymer injection resin |
| Reaction | Reacts with water to form flexible closed-cell polyurethane foam — no mixing required |
| Expansion Factor | Approximately 10 to 20 times original volume on contact with water (water excess dependent) |
| Cured Shore A Hardness | Approximately 20 to 40 — flexible elastic seal suitable for moving joints |
| Injection Equipment | Low-pressure injection pump — maximum injection pressure 3 to 5 bar typical (site and crack conditions dependent) |
| Pot Life (drum, before injection) | Unlimited when container is sealed — reacts only on contact with water during injection |
Get a Quote
+91 9999155255 | info@space-arc.com | Space Arc Engineering, Sahibabad, Ghaziabad
Frequently Asked Questions
What is the difference between MC-Injekt 2600 (hydrophilic PU foam) and MC-Injekt 2700 HV (hydrophobic PU foam) for crack injection, and how should a waterproofing contractor select the correct product for a specific leaking joint in a Delhi basement?
The choice between hydrophilic and hydrophobic polyurethane injection resins is one of the most important and most frequently misunderstood decisions in injection waterproofing. Both products react with water, both seal cracks, and both are injected using similar equipment — but their behaviour in the crack, their foam structure, their flexibility, and their long-term performance in different moisture conditions are fundamentally different. MC-Injekt 2600 is hydrophilic — it loves water. The foam it forms is open to water uptake and will swell further when it contacts water after initial setting. This makes the hydrophilic foam self-sealing: if the joint or crack moves and creates a new micro-gap alongside the cured foam, the foam will absorb water from that gap and swell to re-seal it. This re-sealing capability is the key advantage of hydrophilic foam for applications where the water pressure is continuous, the crack or joint continues to move, and permanent watertightness is more important than dimensional stability of the seal. The disadvantage of hydrophilic foam is that it will shrink if the joint dries out — if the water pressure is removed (for example, during a dry season) and the foam desiccates, it will shrink away from the crack walls and lose its sealing effect, which may then re-establish when water returns. For construction joints in basement walls and tunnels that are continuously under groundwater pressure — the case for most of the older basements and underground car parks in Ghaziabad and Noida built in the 1990s and 2000s with construction joints exhibiting seasonal to permanent leaking — the continuous water pressure and wet environment mean the hydrophilic foam remains permanently expanded and effective. MC-Injekt 2700 HV (High Viscosity) is hydrophobic — it repels water. The foam it forms is a closed-cell structure that does not absorb water and does not swell or shrink with moisture changes. This makes the hydrophobic foam dimensionally stable: once set, the foam volume remains constant regardless of whether the surrounding environment is wet or dry. The disadvantage is that hydrophobic foam does not re-seal if the crack moves and creates a new gap alongside the foam — it must be re-injected. The advantage is long-term dimensional stability, making it preferable in applications where the crack or joint is expected to be intermittently dry (for example, above-ground retaining walls that see water pressure only during monsoon season) and where shrinkage of the foam during the dry season would be unacceptable. For the selection decision in a typical Delhi NCR basement project, the following guideline applies. For permanently wet or high water pressure conditions — continuously leaking construction joints in deep basements (greater than 5 m depth), tunnels, and metro structures under permanent groundwater pressure — MC-Injekt 2600 hydrophilic foam is the preferred choice: the permanent wet environment keeps the foam expanded, the re-sealing capability provides a self-healing margin, and the flexibility accommodates differential settlement and thermal joint movement. For intermittently wet conditions — above-ground retaining walls, planter boxes, lift pits in areas with seasonal groundwater, and joints in water tanks that may be emptied for maintenance — MC-Injekt 2700 HV hydrophobic foam is preferred: the dimensional stability through wet-dry cycles maintains the seal without shrinkage. When in doubt for a specific basement or underground car park project in Delhi NCR, consult Space Arc Engineering — the correct selection depends on the groundwater depth, seasonal groundwater variation, crack movement data, and the joint history in the specific structure.
Source MC-Injekt 2600 for Your Project
Space Arc Engineering is an Authorized Project Distributor for MC-Bauchemie India serving Delhi NCR, Ghaziabad, Noida and Uttar Pradesh.
Get MC-Injekt 2600 — Single-Component Hydrophilic Polyurethane Foam Injection Resin for Water-Bearing Crack and Joint Sealing — pricing, TDS & technical help
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