MC-Bauchemie MC-Injekt 3000 HPS
MC-Bauchemie’s swelling acrylate gel that seals water-bearing cracks and joints from the inside out, even while water is actively coming through.
What is it?
A two-component, low-viscosity acrylate gel injection resin that reacts inside a crack, joint or cavity to form a soft-elastic, swelling seal rather than a rigid bond.
Where is it used?
Injected into active cracks, cold joints and construction joints in reinforced concrete and masonry, and as a curtain (veil) injection into soil around basements, shafts and tunnels.
Why use it?
It stops water at the source, keeps sealing as the structure moves since the cured gel stretches roughly 270%, re-swells if it dries, and is rated for pressure up to 7 bar.
How is it applied?
Pumped through packers or embedded hoses with a two-component injection pump; the applicator tunes gel time on site, from about two-and-a-half minutes to over thirty, via accelerator dosage.
About MC-Bauchemie MC-Injekt 3000 HPS
MC-Injekt 3000 HPS sits apart from the epoxy and PU resins contractors usually reach for first. It is a polymer-reinforced acrylate gel, genuinely a four-part product: base side A1 and A2, reactive side B1 (polymer dispersion) and B2 (accelerator), combined 1:1 on site. Once B2 goes into B1 the clock starts, and dosage decides the speed, from roughly two-and-a-half minutes on a heavy dose at 20°C to half an hour on a light one at 10°C. That control matters, because a crew is trying to make resin travel a predictable distance through an unpredictable network of hairline cracks before it gels, and this material is thin enough, about 3 mPa·s let down with water, to reach where a rigid epoxy never would. Because the cured gel swells and stays soft rather than bonding hard, a hairline reopening later does not automatically mean a fresh leak.
For Space Arc’s project base across Delhi NCR and pan-India, this is the product to specify when the defect is active water, not a structural crack needing load transfer. Monsoon basement walls, retaining structures, lift pits, water tanks and tunnel segments share the same problem: a crack that is wet, sometimes running, exactly when it needs stopping. It injects into damp or water-bearing substrates and still forms a sound seal, where dry-cure epoxies struggle. It also carries paperwork Indian infrastructure work increasingly asks for: EN 1504-5 crack-sealing classification, a DIBt approval, and UBA compliance for drinking-water contact, which is why it turns up on tank and reservoir jobs too. It is not a membrane and does not blanket-treat a slab; it treats line and point defects, alongside a proper waterproofing system, not instead of one.
The technical insight
Worth understanding before specifying this product is the accelerator dosing table on the data sheet. B2 is added to B1, or to plain water for a thinner mix, in quantities as small as 0.2 kg per 102.6 kg of B1, and each step up roughly halves the reaction time. Unlike a fixed-pot-life two-pack resin, the applicator runs a trial batch on site, checks temperature, and picks a dosage that leaves enough working time to pump resin through the packer network before it gels in the crack rather than the hose. Get it wrong and the batch either sets prematurely in the lines or travels too far and dilutes past an effective seal.
Where it is used
- Sealing active, water-bearing cracks in RCC basements and retaining walls
- Curtain (veil) injection into soil around foundations and tunnel linings to cut off groundwater
- Sealing pre-installed construction and cold-joint injection hoses in water-retaining structures
- Sealing cracks, cavities and mortar joints in masonry
- Horizontal damp-proof course injection in masonry affected by rising damp
- Crack and joint sealing in potable water tanks and reservoirs
- Leak sealing in metro stations, tunnels and lift pits
Key advantages
- Very low viscosity, about 3 mPa·s with water, reaches hairline cracks rigid epoxy cannot
- Site-adjustable gel time, roughly 2’30” to 32′, lets the crew control how far resin travels
- Soft-elastic cured gel, about 270% elongation, keeps sealing through ongoing movement
- Swells again on renewed water contact, giving a self-healing margin if the gel dries
- Injects into damp and actively leaking substrates, so work need not wait for dryness
- Rated for water pressure up to at least 7 bar
- Meets the UBA drinking-water guideline and carries DIBt general technical approval
Limitations & considerations
- Not a structural, load-bearing repair; it seals rather than restoring structural continuity
- Needs a two-component injection pump and trained operators, not a DIY cartridge product
- Reaction time is temperature- and dosage-sensitive, so a fresh site trial is needed as conditions change
- Four sub-components must be proportioned accurately; sloppy mixing gives an inconsistent gel
- Narrow +1°C to +40°C application window limits winter and peak-heat working
Selection & best practice
Start with an injectivity check on the actual crack, not the drawings, and work out an injection concept before packers go in. Space packers to crack width, using a purpose-made packer such as the MC-Injektionspacker DS14. Mix component A fully before touching B, then dissolve B2 into B1 (capped at 4% by weight) only when ready to inject, since that starts the clock. Run a small trial batch at site temperature to confirm gel time, and keep the pump’s mixing section at least 20 cm for spiral mixers or 10 cm for grid mixers. Clean equipment with water within the pot life; cured gel comes out mechanically or not at all.
Specifications
| Chemical base | Polymer-reinforced acrylate gel, 2-component (4 sub-part) system |
| Mixing ratio | 1:1 by volume, component A to component B |
| Mixed density | 1.04 kg/dm³ with B1; 1.02 kg/dm³ with water (DIN 53479) |
| Mixed viscosity | approx. 3 mPa·s with water; approx. 15 mPa·s with B1 (DIN EN ISO 3219) |
| Elasticity | approx. 270% elongation (DIN 52455) |
| Application (gel) time | 2’30” to 32′, adjustable via accelerator dosage |
| Standards & approvals | EN 1504-5 U(S1) W(2/3/4)(1/40); DIN 4102 Class B2; UBA drinking-water guideline; DIBt approval |
Industry use cases
Basements & Retaining Structures
Delhi NCR basement and retaining-wall leak stopping during monsoon seepage
Metro & Tunnels
Metro and utility tunnel joint sealing plus soil curtain injection
Water Retaining Structures
Potable water reservoir and elevated tank crack sealing
New Construction
Construction-joint sealing via embedded hoses in new-pour water-retaining structures
Frequently asked questions
Is this the same kind of product as an epoxy crack injection resin?
Can it be injected into a crack that is running water?
What water pressure can a sealed crack withstand?
Is it safe for a drinking water tank?
What equipment does application need?
How long does the gel take to set once mixed?
How we position MC-Bauchemie MC-Injekt 3000 HPS
Within MC-Bauchemie’s own range, MC-Injekt 3000 HPS is the flexible, water-active specialist: for a rigid structural crack on a dry substrate, the in-house comparison is an epoxy from the MC-Injekt structural range; for a moving joint needing PU rather than swelling gel, MC-Bauchemie’s PU-based MC-Injekt products fit better. Specifiers sometimes shortlist Fosroc’s epoxy and PU injection resins for comparable crack work, though Fosroc’s published range has no direct like-for-like acrylate gel, so on active, water-bearing, drinking-water-safe work MC-Injekt 3000 HPS remains the more specific fit. Space Arc supplies and applies the full MC-Injekt line as an authorised distributor.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.