MC-Bauchemie MC-DUR EP
The two-component epoxy primer MC-Bauchemie engineered for its MC-DUR flooring, screed and bridge-deck range.
What is it?
A solvent-based, two-component epoxy primer (87:13 resin-to-hardener by weight) built as the dedicated first coat for MC-Bauchemie’s MC-DUR epoxy flooring and screed systems.
Where is it used?
Bridge decks ahead of waterproof sealing, RCC surfaces before an asphalt overlay, and floor slabs before a floating screed or an MC-DUR epoxy/PU topping goes down.
Why use it?
It penetrates deep into concrete’s pore structure, binds down surface dust and laitance, and gives the topcoat something to key into instead of a weak, dusty skin.
How is it applied?
Roller- or float-applied at roughly 75-100 g/m² per coat onto a clean substrate, then overcoated within 24 hours before the film skins over.
About MC-Bauchemie MC-DUR EP
MC-DUR EP is MC-Bauchemie’s universal priming coat for its MC-DUR family of epoxy flooring and screed systems, sold in India through MC-Bauchemie (India) Pvt Ltd’s Navi Mumbai office and used on everything from bridge decks to factory floors. It’s an unpigmented, translucent resin mixed 87 parts resin to 13 parts hardener by weight — a solvent-carried formulation, giving it deep-penetration behaviour a solvent-free primer can’t quite match on porous or laitance-heavy concrete. On site it reads less like a coating and more like a consolidation treatment: it soaks in and locks the surface down before anything sits on top.
Being a primer, not a wearing surface, its job is narrow: seal concrete roadways on bridges before waterproofing or a wearing course, prime RCC decks ahead of an asphalt overlay, and prepare slabs before a floating screed or an MC-DUR topping is laid. It tolerates substrates that are dry or only slightly damp, not standing wet, which matters on Indian sites where curing and monsoon timing rarely cooperate with a flooring programme. One coat handles most substrates; highly absorbent concrete gets two.
The technical insight
The formulation choice is deliberate. Solvent-borne epoxy primers carry lower viscosity than 100%-solids alternatives, letting resin travel further into capillary pores before it gels — useful on the open-textured, sometimes green concrete typical of Indian bridge decks and industrial slabs. The trade-off: it’s flammable, needs ventilated application, and pot life shortens on hot days. The 24-hour overcoating limit isn’t a soft guideline — miss it and the film has fully cured, so the topcoat bonds to a hard surface instead of fusing into a still-reactive one, meaning abrasion and re-priming before it can be trusted.
Where it is used
- Priming bridge deck concrete before waterproof sealing or the wearing course
- Preparatory coat under asphalt overlays on RCC bridge and flyover decks
- Base priming before floating cement or epoxy screeds are laid
- First coat under MC-DUR epoxy self-levelling floor toppings in industrial plants
- Priming warehouse and logistics floor slabs ahead of epoxy or PU flooring
- Dust-proofing and consolidating porous, friable or laitance-heavy concrete
- Priming multi-level parking deck slabs before a waterproof epoxy coating
Key advantages
- Deep-penetrating resin reaches further into pores than solvent-free primers, giving a genuine mechanical key
- Works on dry or slightly damp substrates — an advantage on Indian sites where slabs rarely dry to schedule
- Doubles as a dust binder, consolidating friable or laitance-prone surfaces on contact
- Purpose-built as the first coat for MC-Bauchemie’s own MC-DUR systems, so interlayer bond is known, not guessed
- Translucent, unpigmented film doesn’t hide substrate defects, so cracks and pinholes get repaired, not painted over
- Roller or float application, no spray rig or specialist equipment needed
- Compact 4.5 kg pack suits patch repairs and smaller runs without forcing a bulk order
Limitations & considerations
- Solvent-based and flammable — needs ventilation, not ideal for occupied, poorly ventilated interiors
- The 24-hour overcoat window is strict; miss it and the surface needs abrading and re-priming before the topcoat bonds properly
- Primer only — no wearing-surface value on its own, must always be followed by an MC-DUR topcoat or screed
- Won’t apply below +5°C, ruling it out for cold-store flooring without a different system
- Highly absorbent substrates need two coats, adding material cost and a day to the programme
Selection & best practice
Treat substrate prep as half the job: the concrete must be genuinely clean — no laitance, oil, old coatings or curing-compound residue — with pinholes patched before MC-DUR EP goes on, since the primer telegraphs rather than hides a poorly prepared surface. Mix the full pack (base stirred, then hardener added) with a slow-speed drill and paddle until homogeneous, box the mix between two containers, and don’t eyeball the 87:13 ratio on partial packs. Apply at 75-100 g/m² per coat and get the topcoat on within 24 hours — in Delhi NCR’s summer heat that window runs shorter, so sequence accordingly and keep tins shaded and closed between uses.
Specifications
| Type of Product | Solvent Containing Epoxy Primer |
| Form | Two-component (Resin + Hardener) |
| Colour | Translucent |
| Mixing Ratio | 87 : 13 by weight (Resin : Hardener) |
| Coverage / Consumption | 75-100 g/m² per coat |
| Minimum Application Temperature | +5°C |
| Overcoating Window | Within 24 hours |
| Shelf Life | 6 months from date of manufacture |
| Pack Size | 4.5 kg (4.5 L) |
Industry use cases
Bridges & Infrastructure
Priming RCC bridge deck concrete before waterproof sealing or an asphalt wearing course.
Industrial & Warehouse Flooring
First coat under an MC-DUR epoxy self-levelling topping in a factory or logistics floor.
Multi-Level & Basement Parking
Priming parking deck slabs ahead of a waterproof epoxy coating system.
Commercial Floor Screeds
Preparing a slab before a floating cement or epoxy screed in office or retail fit-outs.
Concrete Repair Follow-Through
Priming patched or young concrete on repair jobs before flooring works resume.
Frequently asked questions
Can MC-DUR EP go onto slightly damp concrete?
What happens if the topcoat misses the 24-hour window?
Is MC-DUR EP a flooring product on its own?
How much do we need per square metre?
Can it be used inside an occupied building?
How should we store it and how long does it keep?
How we position MC-Bauchemie MC-DUR EP
MC-DUR EP earns its keep as the first coat in MC-Bauchemie’s own MC-DUR epoxy flooring and screed family — pairing it with the matching MC-DUR topcoat is what it’s engineered for, and mixing brands at the primer-topcoat interface is where bond failures tend to start. Where a specifier is working with Fosroc’s flooring range instead, or the slab is still slightly damp and the schedule can’t wait, Fosroc’s Nitoprime 25 is a fair equivalent — a comparable two-component solvent-based epoxy primer built for the same job ahead of Fosroc’s Nitoflor toppings. Space Arc stocks and specifies both families and can advise on whichever pairing suits the topcoat already chosen.
Fosroc Nitoprime 25 — Fosroc’s Nitoprime 25 is a fair equivalent when a specifier is working within the Fosroc flooring range instead, or the slab is still slightly damp and the programme can’t wait for it to dry out further.
Related Industrial Flooring products
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