About MC-Bauchemie MC-DUR 1005 UL-IN

MC-DUR 1005 UL-IN is MC-Bauchemie’s fillable, three-component epoxy underlay for resin flooring — sold in India as a resin, hardener and inert filler pack that a contractor blends on site in a fixed 1.65 : 1.00 : 8.00 ratio by weight. It is not a topcoat. Its job is to take a rough, pitted or simply un-level concrete slab and turn it into a dense, seamless, pore-free base — 1.5 to 5 mm thick in one pour — onto which an epoxy self-levelling (ESL) system or an epoxy floor coating is then applied. Because the filler ratio can be adjusted at site, applicators can tune the mix toward economy on large-area underlays or toward strength where fork-lift and pallet-truck traffic will load the finished floor hard.

In practice, Space Arc specifies MC-DUR 1005 UL-IN wherever an existing industrial or commercial slab needs re-profiling before a resin topping goes down — car park decks, petrol-station forecourts, cold-store approaches, dairy and food-plant floors, and warehouse aisles that have seen years of trolley and vehicle wear. Reaching over 50 MPa compressive strength within seven days, and needing no primer on sound, dense concrete, it cuts a process step out of many flooring build-ups. The trade-off is worth stating upfront: it is a screed, not a finish, so budgeting and scheduling always need to include the topcoat system that follows it.

The technical insight

The number worth reading twice on this data sheet is the mixing ratio: 1.65 : 1.00 : 8.00, resin to hardener to filler by weight. That eight-parts-filler loading is what makes MC-DUR 1005 UL-IN a screed rather than a coating — most of the mixed volume is oven-dried quartz filler bound by a comparatively small dose of reactive epoxy, which is why it can be built up to 5 mm in a single pass without the shrinkage or heat-of-reaction problems a neat resin would show at that thickness. The flow value of 20 cm at 30°C tells an applicator how self-smoothing the mix behaves once poured — enough to level out between screed guides without heavy trowel work, though a spiked roller pass is still needed to de-air it. And the strength curve matters practically, not just on paper: climbing from over 25 MPa at three days to over 50 MPa (50 mm cube, per ASTM C109) at seven days is the reason MC-Bauchemie is comfortable listing car-park decks and fork-lift traffic among the intended end uses, not just light foot traffic.

Where it is used

• Underlay/screed beneath epoxy self-levelling (ESL) toppings and epoxy floor coatings on industrial and warehouse floors
• Oil- and petrol-resistant base course in car parks, garages, petrol stations and car-wash bays
• Water- and chemical-resistant substrate build-up in dairy, brewery, bottling and food-processing plants
• Pharmaceutical manufacturing and packing floor build-ups ahead of hygienic epoxy coating systems
• Re-profiling and levelling worn, pitted or uneven concrete slabs before resin resurfacing
• Base layer for anti-skid, quartz-broadcast resin flooring systems
• Screed layer for loading-bay and ramp floors subject to abrasion and rolling or fork-lift loads

Key advantages

• Site-adjustable filler loading lets applicators tune the same base resin toward economy or toward extra load-bearing strength
• Places up to 5 mm thick in a single pass, cutting build time versus several thin coats
• Good adhesion to sound concrete — needs only 1.5 N/mm² substrate pull-off strength — lowers delamination risk
• Compressive strength climbs past 50 MPa by 7 days, so it stands up to fork-lift and rolling-load traffic once topcoated
• Usually needs no primer on dense concrete, saving a process step on tight shutdown schedules
• Seamless, low-porosity surface gives the ESL or coating topcoat a clean, consistent base to bond to
• Backed by MC-Bauchemie India’s technical team and Space Arc’s trained application crews across Delhi NCR

Limitations & considerations

• It is an underlay only — always needs an ESL or epoxy coating topcoat, which adds a process step and cost that must be budgeted upfront
• Substrate must be at least 25 N/mm² compressive strength, 28 days cured and under 5% moisture content — not usable on young or damp concrete
• Short 30-40 minute pot life at 30°C shrinks further in peak Delhi NCR summer heat, so crew size and batch size need careful planning
• Minimum application temperature of +5°C rules out very early winter-morning pours on some north-India sites
• Three components (resin, hardener, filler) must be weighed and mixed in sequence on site, leaving more room for batching error than a single pre-filled pack

Selection & best practice

Specifications

Industry use cases

How we position MC-Bauchemie MC-DUR 1005 UL-IN

MC-DUR 1005 UL-IN sits at the underlay stage of MC-Bauchemie’s resin flooring build-up. On porous substrates it is typically paired with MC-DUR Range Primer, and it is finished with an MC-DUR epoxy self-levelling (ESL) topping or epoxy coating from the same family, so the full system carries one manufacturer’s logic end to end. Specifiers comparing brands will find Fosroc’s Nitoflor SL2000 the nearest reference point in the market — a 2 mm self-smoothing epoxy topping some contractors use as a combined underlay-plus-finish in one step, rather than MC-Bauchemie’s separate screed-then-topcoat build-up.

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