MC-Bauchemie MC-Floor Screed BS
The polymer-modified bond coat that lets MC-Bauchemie’s fast industrial floor system grip old concrete and return to service within 48 hours.
What is it?
A single-component, cement-bound, polymer-modified bond coat — essentially a factory-proportioned adhesive slurry — brushed or rollered onto prepared concrete or screed just ahead of laying MC-Floor Screed 10 or MC-Floor Screed 25 on top.
Where is it used?
Industrial production floors, warehouses and logistics/distribution centres, forklift and AGV aisles, loading-dock approach slabs, and wheeled-vehicle guideways and carriageways — wherever an old, worn or spalled cementitious floor needs a new topping bonded on fast.
Why use it?
It’s the layer that makes MC-Bauchemie’s ‘weekend repair’ promise possible. MC-Floor Screed 10/25 can cure and gain strength quickly, but none of that matters if the new topping isn’t truly keyed into the old slab — a skipped or badly timed bond coat is the single biggest cause of hollow-sounding, delaminating screed repairs.
How is it applied?
The existing floor is mechanically prepared (typically shot-blasted or scarified) to remove laitance, oil and loose material, then MC-Floor Screed BS is mixed and applied by brush or roller across the whole area. MC-Floor Screed 10 or 25 is placed fresh-into-fresh before the bond coat skins over, so both layers cure as one monolithic system.
About MC-Bauchemie MC-Floor Screed BS
Most industrial floor “repairs” fail for a reason nobody notices until months later — the new topping was never really bonded to the old slab underneath it. MC-Floor Screed BS is MC-Bauchemie’s answer to that problem: a single-component, cement-bound, polymer-modified bond coat engineered specifically to sit under MC-Floor Screed 10 (the fast, self-levelling industrial topping) and MC-Floor Screed 25 (the coarser rehabilitation screed used on badly worn floors). It isn’t marketed as a generic bonding agent for any job — MC-Bauchemie tests and publishes it as one half of a matched system, and that pairing is really the whole point of specifying it rather than a field-mixed SBR slurry.
For an Indian plant or warehouse, the practical case is straightforward. Production and logistics floors here rarely get a two-to-three-week shutdown for a conventional cement-sand screed repair with proper curing — a facility in the Manesar–Bhiwadi belt or a Delhi NCR logistics park wants its floor back under forklifts by Monday, not next month. The MC-Floor Screed system, with this bond coat as its foundation layer, is built around exactly that constraint: walkable in roughly two hours, ready for an MC-DUR coating within a day, and back in full service within a day or two. Space Arc Engineering supplies and applies the system across Delhi NCR and pan-India sites as an authorised MC-Bauchemie distributor and applicator, sequencing the bond coat and topping correctly so the fast cure times are actually achieved on site rather than compromised by a rushed or mistimed primer coat.
The technical insight
The chemistry choice here is deliberate. A neat SBR (styrene-butadiene rubber) slurry bonds mainly by film adhesion and behaves as a thin, flexible interlayer, whereas a straight cementitious slurry bonds by mechanical and chemical continuity with the substrate but offers little flexibility. MC-Floor Screed BS sits between the two: a cement-bound base gives it genuine chemical continuity with both the concrete below and the cementitious MC-Floor Screed 10/25 above, while the polymer modification adds enough flexibility and adhesion to resist the shear stresses of wheeled traffic and thermal movement. The catch is that this only works within a defined time window — the bond coat must still be tacky (“fresh-into-fresh”) when the topping goes down — which is why sequencing and crew coordination matter as much as the material itself, especially in Delhi NCR’s summer heat, where open time shortens considerably.
Where it is used
- Bond coat beneath MC-Floor Screed 10 for fast, self-levelling repair of worn industrial production floors
- Priming layer for MC-Floor Screed 25 where a deeper 25–70 mm rehabilitation screed is needed on badly spalled floors
- Patch repair of localised potholed or delaminated areas in RCC factory and warehouse floors without a full plant shutdown
- Forklift aisles, AGV tracks and pick-face floors in FMCG, e-commerce and 3PL warehouses across Delhi NCR
- Loading-bay and dock-leveller approach slab repairs in distribution centres
- Vehicle guideway, ramp and carriageway patch repairs in multi-level industrial parking and yards
- Weekend or planned-shutdown floor topping replacement where operations must resume the next working day
- Bonding layer ahead of a new screed on old, contaminated or laitance-bearing concrete after mechanical preparation
Key advantages
- Purpose-matched to MC-Floor Screed 10 and 25 — no guesswork on primer-to-topping compatibility or cure-window mismatch
- Cement-bound, polymer-modified chemistry bonds both mechanically and chemically to substrate and topping, not just as a thin adhesive film
- Enables genuinely fast turnarounds: walkable in about 2 hours, overcoatable with MC-DUR coatings in 24 hours, fully trafficable in roughly 48 hours
- Single-component and factory-proportioned, cutting the risk of an inconsistent field-mixed SBR slurry
- Reduces the hollow-sounding, delaminating-topping callbacks that are the most common failure in badly-primed screed repairs
- Keeps the repair inside one tested MC-Bauchemie system, so performance of bond coat, topping and coating stays consistent
- Applied by Space Arc’s trained crews as an authorised MC-Bauchemie applicator, so fresh-into-fresh timing is actually held on site
Limitations & considerations
- It’s a bond coat, not a wearing surface or standalone repair mortar — always used under MC-Floor Screed 10 or 25, never alone
- Only performs on properly mechanically prepared substrate (shot-blasted/scarified, laitance and contamination removed); cannot compensate for skipped surface prep
- Must be applied fresh-into-fresh with the topping within a limited open time, which tightens further in North Indian summer heat
- MC-Bauchemie does not publish detailed coverage rate, mixing ratio or pack-size figures for this product on its public regional sites — confirm current dosage and quantities with Space Arc before ordering
- Being cement-based, it’s less forgiving of a damp or actively wet substrate than a moisture-tolerant epoxy primer would be
- Best results depend on tight sequencing between bond coat and topping, so it suits contractor or MC-Bauchemie-applicator-led work rather than a DIY approach
Selection & best practice
Treat MC-Floor Screed BS as a timing-critical step, not a coat-and-wait primer. Prepare the substrate mechanically — shot-blasting or scarifying to remove laitance, oil contamination and unsound concrete — then apply the bond coat evenly by brush or roller across the full area to be topped; patchy application leaves weak spots the topping can delaminate from later. Choose MC-Floor Screed 10 for thinner, fast, self-levelling repairs and MC-Floor Screed 25 for deeper rehabilitation of badly worn floors. Place the chosen topping fresh-into-fresh while the bond coat is still tacky — never let it skin over and dry before covering it — and have the placing crew ready to follow without a gap. In Delhi NCR summer conditions, work in smaller bays, since higher temperatures shorten open time considerably. Keep the repaired area off traffic for the stated walkable and trafficable periods, and confirm current dosage, coverage and pack-size figures with Space Arc before ordering quantities for the job.
Specifications
| Product type | Single-component, cement-bound, polymer-modified bond coat |
| System role | Bond coat for MC-Floor Screed 10 and MC-Floor Screed 25 industrial floor toppings |
| Substrate | Mineral/cementitious-bound concrete and screed substrates, mechanically prepared |
| Typical settings | Production floors, warehouses, logistics/distribution centres, wheeled-vehicle guideways and carriageways |
| System walkable time | ~2 hours (with MC-Floor Screed 10 topping) |
| System overcoatable time | 24 hours (for MC-DUR range coatings) |
| System full trafficability | ~48 hours (1-2 days) |
| MC-Floor Screed 10 compressive strength (companion topping) | 20 N/mm² at 1 day, 35 N/mm² at 7 days, 45 N/mm² final |
| MC-Floor Screed 25 compressive strength (companion topping) | 35 N/mm² at 3 days, 45 N/mm² at 28 days |
Industry use cases
Automotive & auto-ancillary manufacturing
Weekend-shutdown patch repair of forklift-damaged production floor bays in the Manesar–Bhiwadi–Neemrana belt, back in service before the next shift.
E-commerce & 3PL warehousing
Rehabilitation of worn pick-face and forklift-aisle flooring in Delhi NCR logistics parks that can’t afford an extended floor shutdown.
Industrial parking & yards
Bonding new topping onto spalled ramps and carriageways in multi-level industrial parking structures under constant wheeled-vehicle traffic.
Cold storage & distribution centres
Repair of dock-leveller approach slabs and loading-bay floors ahead of resuming despatch operations.
Light engineering & FMCG plants
Bond-coat preparation of an old, contaminated production floor before laying MC-Floor Screed 10 and finishing with an MC-DUR protective coating.
Frequently asked questions
Is MC-Floor Screed BS a primer, a repair mortar, or a floor coating?
Can it be used under any screed mix, or only MC-Bauchemie’s own toppings?
How fast can we actually get the floor back into use?
Does the old floor need shot-blasting before the bond coat goes on?
Can MC-Floor Screed BS be used to bond an MC-DUR coating directly onto old concrete?
Is there a Fosroc alternative if a project isn’t specified in MC-Bauchemie?
How we position MC-Bauchemie MC-Floor Screed BS
MC-Floor Screed BS is one half of a pair — really a trio — best specified with MC-Floor Screed 10 (fast, self-levelling thin repairs) or MC-Floor Screed 25 (deeper rehabilitation of badly worn floors), and, where a chemical-resistant or decorative finish is also needed, an MC-DUR protective coating once the screed has cured. Space Arc carries the full MC-Floor Screed family and the MC-DUR range, so the bond coat, topping and finish coat can be sourced and sequenced from one supplier rather than mixed across brands. Where a project is already committed to Fosroc products, Nitobond SBR is a genuine bonding-agent alternative for screed work, though it doesn’t come bundled with a matched fast-cure topping system the way MC-Floor Screed BS does — the practical trade-off is a familiar brand versus a tested, faster-turnaround system.
Fosroc Nitobond SBR — A specifier already locked into a Fosroc product list, or one running a conventionally site-batched sand-cement screed rather than MC’s packaged MC-Floor Screed 10/25 system, might choose Nitobond SBR as a standalone SBR bonding aid instead.
Related Industrial Flooring products
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