About MC-Bauchemie Konudur Additiv RP

Konudur Additiv RP isn’t a repair material in its own right — it’s the additive MC-Bauchemie built specifically to make its Konudur Robopress 07 polyurethane injection resin behave inside a live, non-man-entry sewer line. Robopress 07 is the resin robotic-rehabilitation crews inject through CCTV-guided packers to force-lock cracks, pipe collars and lateral connections shut from the inside, without digging up the road or excavating the pipe run. Additiv RP sits alongside it in MC-Bauchemie’s ombran underground sewer systems range, the same product family that supplies India’s trenchless drainage-rehabilitation contractors with everything from manhole repair mortars to hose-liner resins.

The chemistry is straightforward once you see the problem it solves. Robopress 07 is a moisture-reactive polyurethane — the same property that lets it cure inside a wet pipe also makes it foam the moment it touches infiltrating groundwater, which is the default condition in most Indian municipal sewer lines outside the dry season. Uncontrolled foaming leaves a soft, low-density plug rather than the dense seal the job actually needs. Additiv RP, a white, oil-based zeolite paste, is dosed into the resin stream to intercept that free water before it can trigger runaway foaming, so the injected resin cures closer to its intended density and actually locks against the pipe wall instead of ballooning past it.

The technical insight

Zeolite is a crystalline aluminosilicate with a genuinely open molecular structure — the same class of material used industrially as a desiccant and gas-drying agent — and that’s the property MC-Bauchemie is exploiting here. When Additiv RP’s zeolite content meets water at the injection point, it preferentially binds that water into its own structure rather than letting it react with the isocyanate groups in Konudur Robopress 07. Less free water reacting with the resin means less CO2 released as a foaming by-product, and a denser, more controlled cure. It’s a scavenger additive, not a bonding agent or strength contributor in its own right — which is exactly why MC-Bauchemie sells it strictly as a companion to Robopress 07 rather than as a standalone repair compound.

Where it is used

• Robotic packer injection sealing of cracks in non-man-entry sewer and stormwater pipes
• Sealing leaking pipe collars and sockets (Muffen) in buried drainage lines
• Sealing lateral or house-connection intrusion points (Stutzen), a common infiltration source
• Groundwater-infiltration control on aging municipal sewer networks ahead of and during monsoon
• Trenchless point-repair on industrial effluent and process drainage pipework
• Pre-dosing Robopress 07 before injection into actively wet or seeping joints flagged by CCTV survey
• No-dig rehabilitation work in dense urban areas where excavation isn’t permitted

Key advantages

• Purpose-built to intercept the specific failure mode of moisture-reactive PU resin foaming on water contact
• Zeolite content actively scavenges infiltrating water at the injection point rather than fighting the resin’s own chemistry
• Supports the dense, force-locked seal Robopress 07 is specified to achieve, instead of a weak expanded-foam plug
• Single-component, oil-based paste — meterable on site without extra mixing equipment
• Matched and validated specifically for Konudur Robopress 07 by MC-Bauchemie, not a generic foam suppressant
• Not classified as hazardous under CLP and not rated water-hazardous, which simplifies site handling and storage
• Backed by MC-Bauchemie’s ombran underground-infrastructure technical team for site-specific dosing guidance

Limitations & considerations

• Only functions as an additive — no repair value used alone, and must always be dosed alongside genuine Konudur Robopress 07
• Correct dosage depends on how wet the crack or joint actually is, so it needs a technical read of site conditions, not a fixed ratio
• Restricted to robotic, CCTV-guided packer injection work — irrelevant to open-trench or manual crack-injection methods
• A specialist, low-volume item that Space Arc sources to order rather than holds as routine stock, so lead time needs planning
• Published technical literature is thin on numeric performance data beyond the safety data sheet; dosing is confirmed through MC-Bauchemie technical sign-off, not a fixed spec table

Selection & best practice

Specifications

Industry use cases

How we position MC-Bauchemie Konudur Additiv RP

Additiv RP only makes sense bought alongside its parent resin, Konudur Robopress 07, and Space Arc sources both against MC-Bauchemie’s ombran underground sewer systems range — the same family that covers Konudur Robopox epoxy putties and the Konudur 170-series hose-liner resins used in robotic and liner-based sewer rehabilitation. For general building or structural crack injection rather than sewer robotics, MC-Bauchemie’s MC-Injekt range is the relevant Space Arc line instead. There’s no genuine Fosroc equivalent worth naming here — Fosroc’s injection and grouting portfolio is built for building and structural grouting work, not CCTV-robotic packer injection inside non-man-entry sewer lines, so a specifier working on trenchless drainage rehabilitation stays within the MC-Bauchemie/ombran system rather than mixing brands.

Related Concrete Repair products

View all Concrete Repair products →