MC-Bauchemie MC-DUR 1250
One solvent-free epoxy binder, three site consistencies: pourable grout, flowable screed or trowel-grade repair mortar, from a single 2:1 resin-hardener pack.
What is it?
A two-component, solvent-free epoxy binder (resin + hardener) filled on site with graded aggregate to become an epoxy screed, repair mortar, precision grout or tile joint filler, per MC-Bauchemie’s official India TDS.
Where is it used?
Industrial and warehouse floor screeds, machine-base grouting on steel or concrete, RCC repair mortars, and joint filling for acid-resistant tiles — factories, process plants, pharma/FMCG units and PEB warehouses across Delhi NCR and pan-India.
Why use it?
Shrinkage-free curing, rapid early strength (up to 75 N/mm2 at 3 days, 90 N/mm2 at 7 days for filled mixes, ASTM C109 50 mm cubes), high impact and dynamic-load resistance, and a mixing ratio a site crew can actually remember.
How is it applied?
Resin is stirred alone, hardener added at 2:1 by weight and mixed with slow-speed paddles, then graded aggregate is blended in to the required consistency and placed within the 20-30 minute pot life, above +5 degC.
About MC-Bauchemie MC-DUR 1250
MC-DUR 1250 is a two-component, solvent-free epoxy binder that a site crew turns into whatever the job needs: a self-levelling grout for shimming a compressor base, a flowable screed for a floor that must survive fork-lift traffic and acid drips, or a stiff trowel mortar for a spalled ramp. Resin and hardener come pre-proportioned at 2:1 by weight; what changes the outcome is how much graded aggregate gets blended in at site. MC-Bauchemie’s own literature is candid that published ratios are starting points — site trials are expected before a large pour, since local sand grading will not behave identically to a reference gradation.
For a Space Arc customer in Delhi NCR, that flexibility is the real value. A contractor does not want three epoxy SKUs in the store for grouting, screeding and joint filling — one drum of resin and hardener, with filler loading varied batch by batch, covers all three. MC-DUR 1250 has been specified on precision machine-base grouting, RCC repair mortars and acid-tile joint filling in equal measure, which is why MC-Bauchemie files it under floor-coatings literature even though it ships, strictly, as an epoxy grout.
The technical insight
The number that matters here is not one strength value but a curve: compressive strength rises with filler loading. A neat 2:1 pour reaches roughly 40 N/mm2 at 3 days and 75 N/mm2 at 7 days; a 2:1:18 trowel-grade mortar reaches about 75 N/mm2 at 3 days and 90 N/mm2 at 7 days (ASTM C109, 50 mm cubes, per MC-Bauchemie’s TDS). That is the opposite of cementitious grouts, where added filler usually dilutes strength — here the graded aggregate interlocks within the epoxy matrix and does structural work. Practically, the specifier’s job is matching filler ratio and consistency to placement geometry: a flowable 2:1:10 mix for confined gaps under a baseplate, a stiffer 2:1:18 mix for a sloped repair that must not slump. The 20-30 minute pot life is the trade-off for that rapid strength gain, and it is also why MC-Bauchemie insists on substrate pull-off strength above 1.5 N/mm2 before placement — a fast, high-early-strength system will show a weak substrate as debonding almost immediately, not as a slow failure.
Where it is used
- Epoxy screeds and toppings for abrasion-resistant industrial floors
- Precision and general grouting under machine bases on steel or concrete
- Epoxy repair mortars for spalled RCC surfaces and loading-bay ramps
- Joint filling between acid-resistant and normal tiles in process areas
- Mechanical- and chemical-resistant protective coat on steel and concrete
- Bedding/patch mortar under heavy racking and equipment foundations
- Pothole and crack repair on trafficked warehouse floors
- Chemical-resistant lining in pharma, FMCG and process-plant floor zones
Key advantages
- One binder, adjustable from pourable grout to trowel-grade mortar by varying filler loading
- Rapid early strength — up to 75 N/mm2 at 3 days for filled mixes — returns areas to service sooner
- Shrinkage-free curing reduces cracking or debonding at joints and edges
- High impact resistance and good performance under dynamic/vibrating loads
- Solvent-free formulation — lower odour, safer in occupied or confined plant areas
- Works equally on steel and concrete substrates without changing the binder
- Simple 2:1 resin:hardener ratio keeps site batching straightforward
- 9-month shelf life in unopened packaging supports realistic project stocking
Limitations & considerations
- Short 20-30 minute pot life demands small batches and a disciplined, trained crew
- Minimum +5 degC application/substrate temperature rules out early winter-morning pours without warming the site
- Strength and workability depend on correct aggregate grading — MC-Bauchemie recommends site trials, not fixed ratios
- Needs a clean, sound substrate above 1.5 N/mm2 pull-off strength; poor prep on oil-contaminated concrete shows up as debonding
- A specialist reactive-resin system, not a mix-and-pour cementitious grout — needs a competent applicator
- Translucent resin can let substrate staining telegraph through thin toppings on visible floors
Selection & best practice
Treat substrate prep as the deciding factor: grind or scarify to remove laitance, oil and damaged concrete, and confirm pull-off strength exceeds 1.5 N/mm2 before placing. With only 20-30 minutes of pot life, mix small batches sized to what the crew can place and finish — large single mixes are the most common cause of wastage. Run a trial panel with the actual local aggregate before a large pour, since real gradations shift both consumption and consistency from the published guideline ratios. Match filler ratio to the job — flowable 2:1:6 to 2:1:10 for grouting and confined work, trowel-grade 2:1:18 for repairs and ramps. Store unopened, away from sun, rain and frost, and use within the 9-month shelf life. Apply only above +5 degC ambient and substrate temperature.
Specifications
| Product Type | Solvent-free, fillable two-component epoxy (resin + hardener + site-added filler) |
| Mixing Ratio (Resin:Hardener) | 2:1 by weight (base); filled to 2:1:6 / 2:1:10 / 2:1:18 with graded aggregate for pourable to trowelable consistency |
| Pot Life | 20-30 minutes |
| Compressive Strength, 3 Days (ASTM C109, 50 mm cube) | 40-75 N/mm2 depending on filler ratio |
| Compressive Strength, 7 Days (ASTM C109, 50 mm cube) | 75-90 N/mm2 depending on filler ratio |
| Minimum Application Temperature | +5 degC |
| Consumption | Approx. 330-650 g/m2 per mm thickness (mix-dependent) |
| Colour | Translucent |
| Pack Sizes | Resin: 40 kg pails & 5 kg cans; Hardener: 5 kg cans & 1 kg bottles |
Industry use cases
Warehousing & logistics
Epoxy screed and ramp repair on fork-lift trafficked floors in PEB warehouses
Heavy engineering / machine shops
Precision grouting under compressor and machine-tool bases on steel or concrete
Pharma & FMCG plants
Chemical-resistant epoxy topping and acid-tile joint filling in wash-down areas
General building repair
Epoxy repair mortar for spalled RCC columns, beams and floor edges
Process & chemical industry
Mechanical and chemical-resistant protective coat on steel structures and bunds
Frequently asked questions
What’s the difference between the pourable, flowable and trowelable forms of MC-DUR 1250?
How much MC-DUR 1250 do I need per square metre?
Does the floor need a primer before MC-DUR 1250?
Can the 20-30 minute pot life be extended?
Is it suitable for an oily workshop floor?
How is MC-DUR 1250 different from MC-DUR 1250 TX or MI?
How we position MC-Bauchemie MC-DUR 1250
Within MC-Bauchemie’s range, MC-DUR 1250 is the site-flexible, general-purpose option; for dedicated fine trowel filling there’s MC-DUR 1250 TX, and for machinery-grade precision grouting there’s MC-DUR 1250 MI. Against other brands, the nearest genuine equivalent is Fosroc’s Conbextra EP10, a solvent-free epoxy resin grout built specifically for precision baseplate grouting and crack injection. A specifier standardised on Fosroc, or needing only the grouting use case, may reasonably choose Conbextra EP10; MC-DUR 1250 earns its place where one drum needs to double as screed, repair mortar and joint filler on the same site.
Fosroc Conbextra EP10 — A specifier already standardised on Fosroc for precision machine-base grouting, or needing only the grouting use case rather than the wider screed/mortar/joint-filler flexibility, may reasonably choose Conbextra EP10 instead.
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