About MC-Bauchemie MC-Injekt 2700

{“name”:”MC-Injekt 2700″,”slug”:”mc-injekt-2700″,”brand”:”MC-Bauchemie”,”realProduct”:”yes”,”officialSource”:”https://www.mc-bauchemie.sg/assets/downloads/products/en-SG/technical_datasheet/MC-Injekt%202700.pdf”,”category”:”waterproofing”,”metaTitle”:”MC-Injekt 2700 | PU Crack Injection Resin | Space Arc”,”metaDescription”:”MC-Injekt 2700 is a two-component polyurethane injection resin that seals active water leaks and restores strength to cracked concrete, masonry and rock.”,”heroSubtitle”:”MC-Bauchemie’s two-component PU injection resin that chases down active leaks and locks moving cracks solid — built for basements, tunnels and water-retaining structures across India.”,”glance”:{“whatIsIt”:”MC-Injekt 2700 is a two-component, low-viscosity polyurethane (PU) injection resin engineered to seal and structurally strengthen active cracks, joints and voids in concrete, masonry and rock, working even under running water and high hydrostatic pressure.”,”whereUsed”:”Basement and retaining-wall crack injection, diaphragm-wall and sheet-piling joints, tunnel and metro gallery leak-stopping, foundation and loose-rock consolidation, and leak repair in drinking-water structures and pipe sockets.”,”whyUse”:”Because it does two jobs a cementitious grout can’t do at once — it reacts with water to plug an active leak within seconds, then cures into a rigid, high-strength polymer that restores load transfer across the crack rather than just papering over it.”,”howApplied”:”Steel packers (e.g. MC-Stahlpacker 18/300) are set across the crack line, and components A and B are metered 1:1 by volume through a calibrated two-component injection pump (e.g. MC-I 700 vario) fitted with a static mixer, so the resin only reacts and expands once it leaves the nozzle and meets water inside the crack.”},”technicalInsight”:”The number worth dwelling on is viscosity: at approximately 200 ± 50 mPa·s (DIN EN ISO 3219, 20°C), MC-Injekt 2700 is thin enough to travel into hairline cracks that a cement-based grout would simply bridge over. That low viscosity is paired with genuine mechanical performance — over 75 MPa compressive and about 65 MPa flexural tensile strength (DIN EN 196-1) — so the cured resin isn’t just a water block, it’s load-bearing. The trade-off is reaction speed: roughly 30 seconds at 20°C, which is why MC-Bauchemie pairs it with purpose-built pumps and static mixers rather than hand mixing. Volumetric expansion on water contact ranges 1-10 times depending on counter-pressure, so a high-pressure, fast-flowing leak and slow seepage genuinely behave differently and need different accelerator dosing on site.”,”applications”:[“Sealing active, water-bearing cracks in basements, retaining walls and lift pits”,”Rigid crack injection in concrete and masonry where load transfer needs restoring, not just sealing”,”Sealing construction-pit enclosures, sheet-piling and diaphragm-wall joints against groundwater”,”Consolidating loose or fissured rock and unstable ground in tunnelling and mining works”,”Stopping leaks in drinking-water retaining structures, pipe sockets and penetrations”,”Rigid joint sealing in civil and structural engineering under high hydrostatic pressure”,”Improving bearing capacity beneath floor slabs and foundations via void and soil consolidation”,”Leak-stopping in metro, tunnel and underground gallery linings under active water pressure”],”advantages”:[“Reacts with water on contact, so it actively chases and blocks the leak path instead of getting washed out by it”,”Genuinely structural — cured strength (>75 MPa compressive, ~65 MPa flexural tensile per DIN EN 196-1) restores stiffness across the crack, not just water-tightness”,”Low viscosity (~200 mPa·s) reaches hairline cracks that cementitious injection grout can’t penetrate”,”On-site tunable: MC-KAT 27 speeds the reaction, MC-Additiv FS/ST controls foam volume for different water flow rates”,”One material handles dry, water-bearing and high-pressure water-bearing conditions, cutting down on product changeovers mid-job”,”Meets the UBA-guideline for drinking-water contact and the DIBt bulletin on soil/groundwater impact, so it’s usable on potable-water structures”,”Backed by MC-Bauchemie’s own engineered installation system (MC-I 700 pumps, MC-Stahlpacker packers), so the method is proven, not improvised”],”limitations”:[“Strictly a pumped, trained-crew product — needs a calibrated two-component pump, static mixers and steel packers, not a caulking gun”,”Fast ~30-second reaction window leaves little room for error; poor mixing-ratio control or inexperienced handling wastes material and risks an incomplete seal”,”Application stops below +6°C substrate/material temperature, and opened packs must be used within 24 hours”,”Cures rigid, so cracks still expected to move under thermal or structural load are better served by a flexible PU system”,”Cleanup is solvent-only (MC-Verdünnung PU) — water must never be used — so site housekeeping and disposal need planning”,”As a specialist two-pack resin, per-litre cost runs well above cementitious injection grout, so it’s typically reserved for leaks a cementitious grout can’t handle”],”bestPractice”:”Survey the crack and leak pattern first and set steel packers at spacing matched to crack width and depth, not a fixed default. Trial-mix a small batch of components A and B before committing to a live injection run, and match pump pressure and delivery rate to the crack rather than running one setting all day. Add MC-KAT 27 only where flow rate genuinely demands faster reaction, and never substitute water for MC-Verdünnung PU when flushing the pump. Track substrate and material temperature through the job — work stops below +6°C — and use opened packs within 24 hours of opening.”,”specs”:[{“property”:”Chemistry / system”,”value”:”Two-component, low-viscosity, polyurethane (PU) based duromer injection resin”},{“property”:”Mixing ratio”,”value”:”1 : 1 by volume, component A : component B”},{“property”:”Density (mixed)”,”value”:”approx. 1.13 kg/dm³ (DIN EN ISO 2811-1)”},{“property”:”Viscosity”,”value”:”approx. 200 ± 50 mPa·s at 20°C (DIN EN ISO 3219)”},{“property”:”Compressive strength”,”value”:”> 75 MPa (DIN EN 196-1)”},{“property”:”Flexural tensile strength”,”value”:”approx. 65 MPa (DIN EN 196-1)”},{“property”:”Volume expansion in contact with water”,”value”:”1–10 times, depending on counter-pressure”},{“property”:”Application temperature”,”value”:”+6°C to +35°C (air, substrate and material)”},{“property”:”Pack size”,”value”:”20-litre canisters per component (A and B)”}],”useCases”:[{“sector”:”Basement & podium waterproofing”,”detail”:”Injecting active seepage cracks at raft-wall junctions and construction joints in below-grade structures with a high water table, typical of Delhi NCR basements.”},{“sector”:”Metro & tunnel infrastructure”,”detail”:”Stopping running leaks in tunnel linings, shaft walls and cross-passages where groundwater is actively forcing its way through construction joints.”},{“sector”:”Water-retaining & drinking-water structures”,”detail”:”Sealing leakages in RCC reservoirs, pump houses and pipe sockets where UBA drinking-water-contact compliance is a specification requirement.”},{“sector”:”Industrial & warehouse floors”,”detail”:”Consolidating voids beneath slabs and footings to restore bearing capacity, and sealing distressed construction or expansion joints.”},{“sector”:”Heavy civil, dams & retaining structures”,”detail”:”Rock and ground consolidation, plus sealing sheet-pile and diaphragm-wall joints on construction pits against groundwater ingress.”}],”faq”:[{“q”:”Is MC-Injekt 2700 a DIY crack-sealing product?”,”a”:”No — it needs a calibrated two-component injection pump, static mixer and steel packers installed by a trained crew; Space Arc’s applicator team handles the full packer-to-pump installation, not just the material supply.”},{“q”:”Will it stop a crack that’s actively leaking under pressure?”,”a”:”Yes, that’s its core job — on contact with water it foams into a closed-cell mass that blocks the flow path and then cures rigid; foaming intensity (1–10x expansion) can be tuned with additives depending on counter-pressure.”},{“q”:”Does it also add structural strength, or just seal the crack?”,”a”:”Both — cured resin exceeds 75 MPa compressive and about 65 MPa flexural tensile strength (DIN EN 196-1), so it restores load transfer across the crack, not just water-tightness.”},{“q”:”Can this be used on a drinking-water tank or reservoir?”,”a”:”Yes, it meets the UBA-guideline for repair systems in contact with drinking water and the DIBt bulletin on soil/groundwater impact, so it’s specified for potable-water structures.”},{“q”:”What if the crack is still moving from thermal or structural load?”,”a”:”MC-Injekt 2700 cures rigid, so for cracks under ongoing movement a flexible PU system is the better fit — have Space Arc’s team assess the crack before committing to injection.”},{“q”:”What pack sizes are supplied, and what’s the shelf life?”,”a”:”Each component ships in 20-litre canisters, mixed 1:1 by volume, and stores sealed for at least a year between +10°C and +25°C; once opened, a pack must be used within 24 hours.”}],”positioning”:”Within MC-Bauchemie’s own injection range, MC-Injekt 2700 is the fast-reacting workhorse for active leaks; where a job needs a longer working window for careful, low-pressure filling, MC-Injekt 2700 L (same PU chemistry, extended pot life) is the specified swap, and for dry, non-moving structural cracks that call for a stiffer epoxy bond rather than a water-reactive foam, MC-Bauchemie’s epoxy injection resins are the better fit. Outside the MC-Bauchemie family, Fosroc’s Nitofill UR63 is a genuine like-for-like PU crack-injection resin and a credible alternative on projects already standardised on Fosroc systems — Space Arc supplies and applies both brands, so the choice comes down to project spec and site conditions rather than availability.”,”fosrocAlternative”:{“name”:”Nitofill UR63″,”slug”:”fosroc-nitofill-ur63″,”note”:”Specifiers wanting a Fosroc-approved PU crack-injection system for water-bearing cracks often choose Nitofill UR63 instead, particularly where the project’s grout and anchor package is already standardised on Fosroc products.”}}

The technical insight

The number worth dwelling on is viscosity: at approximately 200 ± 50 mPa·s (DIN EN ISO 3219, 20°C), MC-Injekt 2700 is thin enough to travel into hairline cracks that a cement-based grout would simply bridge over. That low viscosity is paired with genuine mechanical performance — over 75 MPa compressive and about 65 MPa flexural tensile strength (DIN EN 196-1) — so the cured resin isn’t just a water block, it’s load-bearing. The trade-off is reaction speed: roughly 30 seconds at 20°C, which is why MC-Bauchemie pairs it with purpose-built pumps and static mixers rather than hand mixing. Volumetric expansion on water contact ranges 1-10 times depending on counter-pressure, so a high-pressure, fast-flowing leak and slow seepage genuinely behave differently and need different accelerator dosing on site.

Where it is used

• Sealing active, water-bearing cracks in basements, retaining walls and lift pits
• Rigid crack injection in concrete and masonry where load transfer needs restoring, not just sealing
• Sealing construction-pit enclosures, sheet-piling and diaphragm-wall joints against groundwater
• Consolidating loose or fissured rock and unstable ground in tunnelling and mining works
• Stopping leaks in drinking-water retaining structures, pipe sockets and penetrations
• Rigid joint sealing in civil and structural engineering under high hydrostatic pressure
• Improving bearing capacity beneath floor slabs and foundations via void and soil consolidation
• Leak-stopping in metro, tunnel and underground gallery linings under active water pressure

Key advantages

• Reacts with water on contact, so it actively chases and blocks the leak path instead of getting washed out by it
• Genuinely structural — cured strength (>75 MPa compressive, ~65 MPa flexural tensile per DIN EN 196-1) restores stiffness across the crack, not just water-tightness
• Low viscosity (~200 mPa·s) reaches hairline cracks that cementitious injection grout can’t penetrate
• On-site tunable: MC-KAT 27 speeds the reaction, MC-Additiv FS/ST controls foam volume for different water flow rates
• One material handles dry, water-bearing and high-pressure water-bearing conditions, cutting down on product changeovers mid-job
• Meets the UBA-guideline for drinking-water contact and the DIBt bulletin on soil/groundwater impact, so it’s usable on potable-water structures
• Backed by MC-Bauchemie’s own engineered installation system (MC-I 700 pumps, MC-Stahlpacker packers), so the method is proven, not improvised

Limitations & considerations

• Strictly a pumped, trained-crew product — needs a calibrated two-component pump, static mixers and steel packers, not a caulking gun
• Fast ~30-second reaction window leaves little room for error; poor mixing-ratio control or inexperienced handling wastes material and risks an incomplete seal
• Application stops below +6°C substrate/material temperature, and opened packs must be used within 24 hours
• Cures rigid, so cracks still expected to move under thermal or structural load are better served by a flexible PU system
• Cleanup is solvent-only (MC-Verdünnung PU) — water must never be used — so site housekeeping and disposal need planning
• As a specialist two-pack resin, per-litre cost runs well above cementitious injection grout, so it’s typically reserved for leaks a cementitious grout can’t handle

Selection & best practice

Specifications

Industry use cases

How we position MC-Bauchemie MC-Injekt 2700

Within MC-Bauchemie’s own injection range, MC-Injekt 2700 is the fast-reacting workhorse for active leaks; where a job needs a longer working window for careful, low-pressure filling, MC-Injekt 2700 L (same PU chemistry, extended pot life) is the specified swap, and for dry, non-moving structural cracks that call for a stiffer epoxy bond rather than a water-reactive foam, MC-Bauchemie’s epoxy injection resins are the better fit. Outside the MC-Bauchemie family, Fosroc’s Nitofill UR63 is a genuine like-for-like PU crack-injection resin and a credible alternative on projects already standardised on Fosroc systems — Space Arc supplies and applies both brands, so the choice comes down to project spec and site conditions rather than availability.

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