MC-Bauchemie Konudur 170 BT
The warm-hardening CIPP lining epoxy built to stay dimensionally stable above 93°C — for trenchless sewer rehabilitation where the pipe, not just the weather, runs hot.
What is it?
A two-component, warm-hardening epoxy resin purpose-built to impregnate polyester-needle-felt liner hoses for cured-in-place-pipe (CIPP) sewer rehabilitation, formulated to hold dimensional stability at temperatures of 93°C and above.
Where is it used?
No-dig rehabilitation of non-accessible sewer pipes, storm-water ducts and industrial drainage lines — municipal trunk sewers, metro and airport utility corridors, and industrial estates or process plants where the effluent or ambient conditions run hot.
Why use it?
Standard CIPP resins can soften, distort or lose structural performance when the liner sees sustained high heat during transport, curing or in-service effluent flow; the BT grade is formulated specifically to hold its shape and strength through that thermal load.
How is it applied?
Metered 5:1 by weight (base:hardener) and mixed only by slow mechanical stirrer or static mixer — never by hand — used to vacuum-impregnate the felt liner, which is then inverted or winched into the host pipe and cured under steam or hot-water pressure at a minimum of +80°C.
About MC-Bauchemie Konudur 170 BT
CIPP (cured-in-place pipe) rehabilitation lets a contractor renew a damaged sewer without breaking a single slab: a felt liner soaked in resin is winched or inverted into the host pipe, pressed against the old pipe wall, then cured in place until it forms a tight new structural tube inside the original conduit. Konudur 170 BT is the resin that makes that possible when the job runs hot. It is the “very high boundary temperature” member of MC-Bauchemie’s Konudur 170 family, sitting alongside Konudur 170 TR (the tropic-temperature grade) and Konudur 170 TR-NA (built for automated mixing and dosing plant), and is engineered specifically to hold dimensional stability above 93°C rather than the narrower range a standard grade tolerates. Practically, that matters when the liner sits under prolonged direct sun during transport and installation, or when the sewer itself carries warm industrial effluent rather than ordinary domestic wastewater.
For India this isn’t a shelf product — it’s a project-specification resin bought against a defined CIPP job, typically by specialist trenchless-technology contractors executing municipal, metro, airport or industrial-estate sewer rehabilitation where open-cut excavation isn’t an option under live roads, rail corridors or plant premises. Delhi NCR’s summer ambient temperatures, and the elevated discharge typical of process industries, make the BT grade’s high-temperature stability a directly relevant spec rather than a marginal upgrade. Space Arc Engineering supplies Konudur 170 BT as an authorised MC-Bauchemie channel partner alongside the rest of the OMBRAN underground sewer systems range, so specifiers on a trenchless sewer package can source the resin grade that actually matches their site’s boundary conditions instead of defaulting to one generic variant.
The technical insight
The chemistry is worth understanding before specifying it: Konudur 170 BT is a warm-hardening epoxy, not an ambient-cure one — it needs a minimum of +80°C to cure at all, achieved through steam or hot-water pressure in the liner curing rig, and MC-Bauchemie’s own data sheet notes that a 10 K swing in temperature roughly doubles or halves the stated working and curing times. That’s a different discipline from the room-temperature epoxies used in structural bonding or flooring, and it means curing schedules have to be planned around actual achieved heating temperature, not ambient site conditions. The mixed viscosity of approximately 8,000 mPa·s (component A alone runs closer to 10,000 mPa·s, component B a thin 600 mPa·s) is tuned to wet out a 3 mm polyester-needle felt evenly without pooling or starving sections of the hose — get that impregnation wrong and the cured liner ends up with resin-poor patches that can fail structurally well before design life.
Where it is used
- Impregnation of polyester-needle-felt CIPP liner hoses prior to inversion or winching
- Trenchless (no-dig) rehabilitation of defective non-accessible sewer pipes and ducts
- Structural relining of storm-water and municipal trunk sewer lines under live roads or rail corridors
- Rehabilitation of industrial process or effluent drainage lines subject to elevated discharge temperatures
- Relining sewer laterals and connector pipes at refineries, textile and dyeing units, and process industries
- Sewer rehabilitation beneath live infrastructure — roads, metro corridors, airports — where excavation is impractical
- Renewal of ageing brick, concrete or ceramic sewer conduits without disturbing surface structures
- Municipal and PWD trenchless sewer packages specified to EN 11296-4 CIPP resin compliance
Key advantages
- Dimensional stability above 93°C resists softening or deformation under hot effluent or sustained ambient heat
- Low mixed viscosity (~8,000 mPa·s) drives thorough, even felt impregnation without resin-poor patches
- Long working time (~1 hour per 10 kg batch, ~3.5 hours for impregnated felt, both at 15°C) gives crews room to complete full liner lengths
- High post-cure mechanical performance — approx. 105 N/mm² compressive and 84 N/mm² flexural strength
- Good adhesion to brick, concrete, ceramic and metallic host-pipe substrates, whether dry or moist
- Trenchless installation avoids road-cutting, traffic disruption and utility conflicts common to open-cut sewer repair
- Certified to the EN 11296-4 CIPP resin standard for verifiable specification compliance on tenders
- Proportionate paired 30 kg packaging reduces on-site batching and mix-ratio errors
Limitations & considerations
- Warm-hardening chemistry only — needs external heat input of at least +80°C via steam or hot water; it will not cure at ambient temperature
- Narrow processing window (10-35°C air/substrate, 15-20°C material) demands active site and weather control during impregnation
- Mixing is machine-only (slow stirrer or static mixer, max. 400 rpm) — hand-mixing and partial batching are explicitly disallowed by the manufacturer, so this is a specialist trenchless-contractor material, not a general site product
- As a niche CIPP-specific resin it isn’t stocked in small retail quantities; procurement is project-based through the authorised MC-Bauchemie channel
- Unusable on its own — it requires the wider CIPP liner system: felt hose, impregnation rig, inversion or winching equipment, and a curing rig
- Being epoxy-based, handling calls for standard epoxy PPE, skin protection and ventilation per the component A and B safety data sheets
Selection & best practice
Always read Konudur 170 BT alongside MC-Bauchemie’s companion “General Application Advice for CIPP Liner Systems” data sheet — this TDS deliberately defers substrate preparation, impregnation technique, and installation/curing steps to that document. Mix strictly by machine; hand-mixing or mixing partial quantities is not permitted and risks an off-ratio, under-cured batch. Hold material temperature at 15-20°C and site/air temperature at 10-35°C through impregnation, remembering that every 10 K shift roughly doubles or halves working and curing times. Do not release installation pressure before the full curing time appropriate to your actual achieved heating temperature — the ~80-minute figure is specific to an 80°C heating temperature and will extend if that isn’t reached. For any condition outside these standard parameters, get MC-Bauchemie’s or Space Arc’s technical team to review before works begin.
Specifications
| Chemistry / system | Two-component, warm-hardening epoxy resin (component A base + component B hardener) |
| Mixing ratio (A:B) | 5 : 1 by weight |
| Density, mixed | approx. 1.35 kg/dm³ (component A ~1.46, component B ~0.97 kg/dm³) |
| Viscosity, mixed | approx. 8,000 mPa·s (component A ~10,000 mPa·s, component B ~600 mPa·s) |
| Working time (10 kg batch) | approx. 1 hour at 15°C; approx. 3.5 hours for impregnated felt at 15°C |
| Application temperature range | Air/substrate 10–35°C; material (resin) temperature 15–20°C |
| Curing | Warm-hardening only, minimum +80°C; approx. 80 minutes to installation-pressure release at 80°C heating temperature; dimensional stability ≥ 93°C |
| Mechanical strength (cured) | Compressive approx. 105 N/mm² (EN ISO 604); Flexural approx. 84 N/mm² (EN ISO 178); E-modulus approx. 4,000 N/mm² (EN ISO 178) |
| Standard & pack size | EN 11296-4 compliant CIPP resin; supplied as paired 30 kg containers (A+B); 12-month shelf life at 5–30°C, dry, in original sealed packaging |
Industry use cases
Municipal / urban local bodies
Relining ageing non-accessible trunk sewers under busy Delhi NCR roads without open-cut excavation or traffic closure
Industrial estates & process plants
Rehabilitating effluent and process drainage lines that run at elevated discharge temperatures, where a standard-grade resin risks softening
Metro, rail & airport authorities
Renewing underground utility and drainage corridors beneath live pavement, track-bed or apron without disturbing the surface structure
Textile, dyeing & chemical clusters
Relining process drain pipework in industrial clusters where hot wastewater is routine rather than occasional
Specialist trenchless-technology contractors
Executing EN 11296-4 compliant CIPP liner installations on government or PWD sewer-rehabilitation tenders that specify high-temperature boundary conditions
Frequently asked questions
What does the “BT” in Konudur 170 BT mean, and how is it different from Konudur 170 TR?
Can this resin cure at normal ambient site temperature?
What’s the mixing ratio, and can it be mixed by hand on site?
What pack size does it come in, and can it be bought in small quantities?
Which standard does Konudur 170 BT comply with?
Is there a Fosroc equivalent for high-temperature CIPP sewer lining resin?
How we position MC-Bauchemie Konudur 170 BT
Konudur 170 BT sits inside MC-Bauchemie’s OMBRAN underground sewer systems range as the high-temperature specialist within the Konudur 170 CIPP resin family — pair it against Konudur 170 TR for standard tropic conditions or Konudur 170 TR-NA where the site runs automated mixing and dosing plant, and cross-reference Konudur 170 TL-NV, Konudur Flexfit (for flexible liner-to-manhole bonding) and Konudur HL 11 PVC for the accessible-structure and connection side of the same rehabilitation package. This is a narrow, project-specified category rather than a competitive shelf category: mainstream Indian repair-mortar brands, including Fosroc, don’t carry a direct CIPP lining-resin counterpart, so specifiers choosing between suppliers are really choosing between MC-Bauchemie and other dedicated trenchless-resin manufacturers, not between MC-Bauchemie and the usual concrete-repair alternatives. Space Arc’s role here is as an authorised MC-Bauchemie stocking and technical-support partner for CIPP-based sewer rehabilitation contractors working across Delhi NCR and pan-India.
Related Concrete Repair products
Source MC-Bauchemie Konudur 170 BT for your project
Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.