MC-Bauchemie Konudur 170 TR-NA
A tropical-grade, pump-ready epoxy resin engineered to impregnate CIPP liners for trenchless rehabilitation of non-accessible sewer and duct lines.
What is it?
A two-component, thermo-reactive (warm-curing) epoxy resin used to saturate polyester needle-felt sleeves in Cured-in-Place-Pipe (CIPP) liner systems. “TR” marks the tropical-climate formulation; “NA” marks the non-abrasive additive package built for automatic mixing and dosing plants.
Where is it used?
Trenchless, no-dig rehabilitation of non-accessible sewer pipes, stormwater ducts and drainage lines – municipal sewer networks, STP feeder lines, industrial effluent channels and utility corridors under roads or live plants.
Why use it?
It restores structural and hydraulic integrity to failing underground pipework without excavation, cutting traffic disruption and cost versus open-cut replacement, while its non-abrasive resin protects the pumps and mixers inside robotic lining rigs from premature wear.
How is it applied?
Component A and B are metered at a fixed 100:42 ratio through a calibrated automatic dosing plant, used to fully impregnate a polyester felt liner tube, which is inverted or winched into the host pipe and cured by circulating hot water or steam at 80-90°C.
About MC-Bauchemie Konudur 170 TR-NA
CIPP – Cured-in-Place-Pipe – is the standard trenchless fix utility contractors reach for when an old sewer or duct has cracked or lost capacity but digging it up isn’t an option, such as a collector line under a congested market road. The felt sleeve winched into the host pipe is only as good as the resin soaked into it, and that’s where Konudur 170 TR-NA sits within MC-Bauchemie’s OMBRAN range for underground sewer systems. “TR” flags the tropical-environment formulation, built to stay workable through the higher ambient and material temperatures typical of Indian sites. “NA” means this pack is built for fully automated dosing plants – the resin carries no abrasive filler, so it doesn’t wear through pump seals and mixer elements the way a filled resin would over high-volume throughput.
The performance story is a deliberate two-stage cure. At normal site temperature the mixed resin stays workable for roughly one and a half to six hours depending on conditions, giving crews a real window to saturate long liner runs evenly – then, once hot water or steam is circulated through the installed liner at 80-90°C, it locks off fast, with installation pressure typically releasable in three to four hours. Fully cured, it delivers a compressive strength of about 87 N/mm² and flexural strength of about 56 MPa, within the range CIPP design codes expect of a structural liner, with good adhesion to concrete, brick or ceramic host-pipe walls even where damp – realistic for a live sewer. For contractors running AMRUT or Smart City trenchless programs across Delhi NCR, that mix of tropical workability and pump-friendly consistency keeps a dosing plant running through a full shift.
The technical insight
This is a classic warm-hardening epoxy: cure doesn’t begin until the resin sees roughly +70°C, which is why it stays pumpable for hours at ambient temperature, then switches to a fast, triggered cure once hot water or steam hits the installed liner – long open time for impregnation, short cure for installation. The catch is the viscosity gap between components: Component A runs near 4,500 mPa·s against Component B’s 600 mPa·s, so holding the 100:42 ratio depends on dosing-plant calibration, not operator judgement. That’s exactly why the NA variant strips out abrasive fillers – the pumps and mixers holding that ratio shift after shift last longer before recalibration or reseal.
Where it is used
- Impregnation of polyester needle-felt liners for trenchless CIPP sewer relining
- Structural/semi-structural rehabilitation of non-accessible sewer pipes and ducts
- Renewal of ageing brick, RCC or vitrified-clay sewer lines under roads
- Rehabilitation of stormwater drains and culverts without open-cut excavation
- Relining of industrial effluent and process drain lines in live plants
- STP/ETP feeder-line and utility-corridor rehabilitation in congested urban sites
- Municipal sewer renewal under AMRUT and Smart City trenchless programs
- Airport, metro corridor and industrial-estate duct relining where digging isn’t permitted
Key advantages
- Long open time at ambient temperature for even impregnation of long liners
- Fast triggered cure – installation pressure releasable in as little as 3 hours at 90°C
- Non-abrasive package protects dosing-pump seals and static mixers on lining rigs
- Solid mechanicals (E-modulus ~3,900 N/mm², compressive ~87 N/mm², flexural ~56 MPa)
- Reliable adhesion to concrete, brick and ceramic host pipes, even when damp
- Trenchless installation keeps roads, traffic and operations undisturbed
- REACH-assessed for long-term water contact, relevant to wastewater use
- 12-month sealed shelf life gives project scheduling some room to move
Limitations & considerations
- Cure is entirely heat-triggered (min +70°C); won’t harden at ambient temperature
- Needs a calibrated automatic dosing plant – hand-mixing isn’t permitted
- Ratio/viscosity sensitivity means pump calibration drift can hurt cure and strength
- Needs specialist CIPP inversion/winching equipment and trained crews, not a general patch material
- Uncured resin/hardener need proper PPE and ventilation per the safety data sheets
- A project-specific resin ordered against scope, not stocked in small retail quantities
Selection & best practice
Treat temperature as the one variable that makes or breaks the job. Keep air/substrate temperature between 10-35°C and material temperature 15-20°C before mixing, and drive cure with 80-90°C circulating water or steam for the stated 3-4 hours – it will not cure at ambient. Calibrate the dosing plant before every batch given how sensitive the 100:42 ratio is, and confirm the liner felt is fully saturated, since dry pockets are where failures start. Store components sealed, dry, 5-20°C, and use within 12 months.
Specifications
| Chemistry / System | Two-component, low-viscosity, thermo-reactive (warm-curing) epoxy resin; light-blue pigmented; NA variant is free of abrasive fillers for automatic dosing plants |
| Mixing ratio (A:B) | 100 : 42 by weight / 100 : 45 by volume |
| Density | ~1.25 kg/l (Comp. A), ~1.16 kg/l (Comp. B), ~1.22 kg/l (mixed) |
| Viscosity | ~4,500 mPa·s (Comp. A), ~600 mPa·s (Comp. B) |
| Compressive strength | ~87 N/mm² (EN ISO 604) |
| Flexural strength | ~56 MPa (EN ISO 178) |
| E-modulus | ~3,900 N/mm² (EN ISO 178) |
| Cure regime | Warm-hardening only, min. +70°C; full cure ~4 h at 80°C heating temperature / ~3 h at 90°C heating temperature |
| Pack size / storage | Matched pair of proportioned Component A + B containers; 12 months shelf life at 5-20°C, dry, sealed |
Industry use cases
Municipal sewer/STP rehabilitation
Trenchless CIPP relining of ageing sewer and STP feeder lines for municipal corporations and utilities across Delhi NCR and other Indian cities.
Industrial effluent/process drains
Relining of effluent and process drain lines inside operating factories and industrial estates without a shutdown for open-cut work.
Urban road-corridor sewer renewal
Renewal of sewer lines under congested lanes and market roads where open-cut excavation disruption is unacceptable.
Airports, campuses & townships
Rehabilitation of utility ducts under live operational constraints where digging isn’t permitted.
Legacy/heritage city cores
Relining of older brick sewer lines in city cores where excavation permissions are restricted.
Frequently asked questions
Can this be mixed by hand for a small job?
Does the liner cure at normal outdoor temperature?
What’s different between Konudur 170 TR and TR-NA?
What substrates does it bond to?
How is it packed and stored?
Can it patch a manhole chamber or visible concrete?
How we position MC-Bauchemie Konudur 170 TR-NA
Konudur 170 TR-NA sits in MC-Bauchemie’s OMBRAN range for underground sewer systems, alongside standard Konudur 170 TR (same chemistry, manual/semi-manual dosing) and Konudur 170 BT – Space Arc supplies and advises across this family for trenchless contractors. For accessible manholes or above-ground concrete, MC-Bauchemie’s Nafufill and Emcekrete repair mortars are the correct fit instead. This is a narrow, specialist category: Fosroc’s published range centres on concrete repair, waterproofing and flooring and doesn’t extend into automated-dosing CIPP resins, so there’s no genuine Fosroc equivalent here. Where a second quote is genuinely needed, the realistic bench is other international trenchless-resin suppliers such as Sika’s CIPP liner systems.
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