About MC-Bauchemie MC-Floor WB

MC-Floor WB is MC-Bauchemie’s water-borne answer to a common problem on Indian project sites: how to seal and dust-proof a concrete floor, or prime it for a resin topcoat, without filling an occupied building with solvent fumes. It is a two-component system. Component A is a waterborne epoxy dispersion and Component B is a water-miscible amine hardener; once they are mixed and rolled onto prepared concrete, the water carrier leaves and the epoxy cures to a tough, tightly bonded film that locks down surface dust and closes the pores of the slab. Because water rather than solvent does the carrying, the mixed material stays well under the VOC thresholds that matter for green-building credits and for indoor air quality in hospitals and manufacturing cleanrooms.

The product wears two hats on a job. On its own it is a light-duty sealer that turns a dusty, porous power-floated slab into a clean, wipeable surface for offices, corridors and low-traffic production areas. Used as a primer, it soaks into the concrete and gives a following MC-Floor resin coat the mechanical key it needs to bond, which is why specifiers often write it into a two- or three-coat floor build-up rather than as a finish in its own right. For contractors working to tight handover dates, the appeal is speed: at 25 degrees Celsius the floor takes light foot traffic in six to eight hours and light vehicle traffic within a day, so a room can be sealed, cured and reoccupied inside a single shift cycle.

The technical insight

The performance of a water-borne epoxy hinges on coalescence, not just chemical cure. When the two components are mixed, the amine hardener begins reacting with the epoxy dispersion while the water phase evaporates; as the water leaves, the dispersed epoxy particles are drawn together and fuse into a continuous, cross-linked film. This is why ambient conditions are so decisive with MC-Floor WB. Below about 15 degrees Celsius the water struggles to leave and the epoxy particles coalesce slowly, so cure times stretch from hours into the better part of a day. Above 85 percent relative humidity the surface simply cannot shed its water, and the film risks staying soft or blushing. Get the window right, though, and the low viscosity of the waterborne dispersion works in your favour: it penetrates the open capillaries of a CSP 3 concrete surface, anchors mechanically, and develops a pull-off adhesion of at least 1.5 MPa to properly prepared concrete when checked to EN 1542. That penetration is exactly what makes it a reliable primer, because the following resin coat is bonding to an epoxy that is genuinely gripped into the slab rather than sitting on laitance.

Where it is used

• Dust-proofing and sealing bare concrete floors in hospitals, clinics and healthcare corridors
• Priming concrete before MC-Floor resin topcoat systems in enclosed rooms
• Light-duty floor sealing in pharmaceutical GMP Grade C and D manufacturing areas
• Floor sealing in food processing and beverage plants in low-traffic zones
• Sealing office, retail and commercial concrete floors where solvent odour is unacceptable
• Sealing power-floated slabs in electronics and light-assembly workshops
• Providing a clean, wipeable surface in laboratories and packing halls
• Consolidating friable or dusty surfaces ahead of a heavier-duty coating build-up

Key advantages

• Low VOC content lets it be applied safely in occupied, enclosed and poorly ventilated spaces
• Water-borne chemistry means minimal odour and easy tool clean-up with water before cure
• Fast return to service: light foot traffic in 6-8 hours and light vehicle traffic within 24 hours at 25 degrees Celsius
• Penetrates and dust-proofs porous concrete while sealing surface pores
• Doubles as a primer, giving MC-Floor resin topcoats a sound mechanical key
• Verified adhesion of at least 1.5 MPa to prepared concrete (EN 1542)
• Supports GRIHA and LEED green-building intent through its low emissions
• Suited to hygiene-sensitive settings such as GMP pharma and food-contact areas

Limitations & considerations

• Light-duty only; for trolley, pallet-truck or forklift traffic it must be over-coated with an MC-Floor resin topcoat
• Curing slows sharply below 15 degrees Celsius, so winter and cold-store work needs planning
• Cannot be applied above 85 percent relative humidity without risking a soft or blushed film
• Application is restricted to a 10-35 degrees Celsius window, ruling out the hottest peak-summer afternoons
• As a thin-film sealer it will not bridge cracks or level an uneven, spalled slab
• Requires proper mechanical preparation to CSP 3; it will not perform over laitance or a smooth trowelled skin

Selection & best practice

Specifications

Industry use cases

How we position MC-Bauchemie MC-Floor WB

MC-Floor WB sits at the light-duty, low-odour end of the MC-Bauchemie floor range, and it is designed to be built on rather than used alone. Where a floor sees real mechanical load, specify it as the primer beneath an MC-Floor resin topcoat, or move up to the MC-DUR water-based epoxy binders such as MC-DUR 1101 or MC-DUR 111 eco for a fuller industrial build-up. From our other brand lines, we also supply Fosroc Nitoflor and Sika epoxy floor systems for heavier traffic, and Fosroc Nitoflor Hardtop dry-shake hardeners where a monolithic hard-wearing slab is the goal rather than a thin-film seal. If the concrete first needs blow-holes and imperfections faired out, pair it with a fairing coat such as Fosroc Nitocote VF before priming.

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