MC-Bauchemie Nafuquick
MC-Bauchemie’s ready-mix fine fairing mortar for cosmetic concrete finishing — supplied and applied by Space Arc Engineering across Delhi NCR and pan-India project sites.
What is it?
A single-component, polymer-modified, hydraulically-setting fine repair mortar (fairing coat) supplied as a grey powder that’s simply mixed with water on site.
Where is it used?
Blowhole and pore filling on fair-faced concrete, cosmetic repair of precast elements, levelling formwork offsets, and as a smoothing scratch coat ahead of protective or decorative coatings.
Why use it?
Chloride-free, mixes and applies with ordinary hand tools, sets rapidly, bonds well to sound concrete, and can be drawn out in very thin layers without losing a crisp, fair-faced look.
How is it applied?
Dampen the substrate, mix 30 kg of powder with 6.5-7 litres of water to a stiff, lump-free paste, and apply by spatula, float or trowel inside the roughly 20-30 minute pot life; for deeper cavities, extend it 1:1 with 1-3 mm sharp silica sand.
About MC-Bauchemie Nafuquick
On most repair and precast sites, the structural fix is only half the job — once a spall, tie-bolt mark or honeycombed patch has been filled with a structural mortar, the surface still needs to look and perform like the concrete around it. That’s the gap Nafuquick is built for. It is MC-Bauchemie’s fine, polymer-modified fairing mortar: a single-component grey powder that turns into a smooth, workable paste with nothing more than water, designed to be drawn out in very thin coats over rough, porous or honeycombed concrete. Its fine 0.2 mm grain size means it finishes closer to a skim coat than a patching mortar, which is exactly why it earns its place as the last step in a concrete cosmetics sequence rather than the first.
For Space Arc’s customers across Delhi NCR — precast yards, flyover and metro contractors, facade applicators and RCC building sites — Nafuquick typically shows up wherever exposed or fair-faced concrete has to look presentable: closing blowholes on soffits before painting, tidying broken corners on precast elements before dispatch, or providing a clean substrate ahead of a protective coating like EmceColor-flex or a waterproof coating on a tank wall. Because it contains no chlorides, it’s also a safer finishing choice around reinforced sections than generic filler pastes picked up off a hardware-store shelf. Space Arc stocks and supplies genuine MC-Bauchemie material with batch traceability, and where needed, can put trained applicator crews on site so the fairing coat is mixed and finished the way the data sheet actually specifies — not guessed at by an untrained mason.
The technical insight
The detail worth flagging to any site engineer is what Nafuquick is not: it is not a structural repair mortar, and it isn’t meant to carry load or rebuild section depth. Its published system is a single-component, polymer-modified, hydraulically-setting fine mortar with a 0.2 mm maximum grain size and a mixed density of about 1.65 g/cm³ — a fine cementitious system closer to a rendering skim than a coarse patch repair compound. MC-Bauchemie’s own instructions are explicit that it should go on in extremely thin layers, and that anything deeper than a skim — genuine holes or cavities — needs the mix extended 1:1 with 1-3 mm sharp silica sand rather than troweled on thick in a single pass. Substrate preparation matters too: the data sheet calls for a pull-off strength above 1.5 N/mm² and a substrate that’s damp, not saturated, before application, and the roughly 20-30 minute pot life (at typical site temperatures) means it has to be batch-mixed in small quantities, not left standing in a bucket between uses. Used correctly — as the cosmetic finishing layer over a properly repaired or sound concrete substrate — it does exactly the fine job it’s designed for; used as a substitute for structural repair, it will not perform, and no reputable applicator should present it that way.
Where it is used
- Filling blowholes, pinholes and pore defects on fair-faced/exposed RCC surfaces before painting or coating
- Cosmetic repair of shrinkage cracks and demoulding blemishes on precast concrete elements
- Levelling formwork offsets and honeycombed patches on columns, beams and soffits
- Finishing/scratch coat applied over structural repair mortars to give a smooth substrate for protective coatings
- Repairing broken corners and edges on precast panels, kerbs and copings
- Substrate preparation layer under decorative or protective coating systems such as EmceColor-flex or Betonflair W
- Smoothing large exposed concrete elevations and facades ahead of architectural or waterproof coatings
- Closing tie-rod holes and small surface voids on flyover piers, tunnel linings and precast girders
Key advantages
- Chloride-free formulation, so it carries no risk of accelerating corrosion around embedded reinforcement
- Single-component — just add water on site, with no separate bonding agent or polymer to dose and mix in
- Fine 0.2 mm grain size gives an almost paint-like, smooth fairing finish rather than a visibly patched look
- Can be drawn out in very thin coats while still meeting the required substrate bond strength
- Rapid hydraulic set supports fast turnaround on repetitive precast and facade finishing work
- Weather-resistant once cured, suited to India’s humidity and monsoon exposure conditions
- Easy hand application with ordinary spatula, float or trowel — no specialised spray equipment needed
- Extendable with sharp silica sand for slightly deeper voids, giving one material some flexibility across minor site defects
Limitations & considerations
- A fine cosmetic/fairing mortar only — not a structural repair mortar; spalled or rebar-exposed sections need a proper structural repair system first
- Short pot life of roughly 20-30 minutes demands small batch mixing and disciplined sequencing on larger elevations
- Minimum application temperature of +5°C limits early-morning winter work at colder North Indian and hill sites
- Fresh application needs protection from direct sun, wind and rain to avoid surface blemishes or crazing
- Not intended to fill deep pockets in a single thick pass — genuine cavities need sand-extension rather than a heavy coat
- Six-month shelf life from date of manufacture means site stores need proper stock rotation, especially on slow-moving projects
Selection & best practice
Dampen (never saturate) the substrate, confirm a pull-off strength above 1.5 N/mm² before starting, and mix only as much Nafuquick as your crew can place within its 20-30 minute pot life — re-tempering a stiffening batch with extra water is the single most common cause of a chalky, weak-bonding finish coat on site.
Specifications
| Type / system | Single-component, polymer-modified, hydraulically-setting fine repair mortar (fairing coat) |
| Form | Grey powder |
| Density (mixed) | 1.65 g/cm³ |
| Maximum grain size | 0.2 mm |
| Mixing water | 6.5-7 litres per 30 kg sack |
| Pot life | Approx. 20-30 minutes at normal site temperature |
| Minimum application temperature | +5°C |
| Pack size | 30 kg sack |
| Shelf life | 6 months from date of manufacture, unopened, protected from rain, sun, heat and frost |
Industry use cases
Flyovers & metro viaducts
Fairing coat used to close blowholes and tie-bolt marks on pier, soffit and parapet surfaces before protective coatings go on elevated corridor structures.
Precast concrete plants
Repairs shrinkage cracks, broken corners and demoulding blemishes on precast panels and elements before dispatch to site.
RCC facades & fair-faced concrete
Cosmetic finishing of exposed concrete columns, beams and walls to retain a clean architectural fair-faced appearance.
Water tanks, STPs & WTPs
Smooths surface pores and honeycombing as a prep layer ahead of interior waterproof coatings on tank and chamber walls.
Industrial & warehouse structures
Touch-up repair of formwork offsets and minor honeycombed patches on columns and beams during construction handover.
Frequently asked questions
Is Nafuquick a structural repair mortar?
How much water do I mix with a 30 kg bag?
How thick a layer can I apply in one pass?
What’s the working time once it’s mixed?
Can it be applied on cold Delhi winter mornings?
Does Space Arc supply and apply Nafuquick together?
How we position MC-Bauchemie Nafuquick
Within the MC-Bauchemie range, Nafuquick sits specifically at the cosmetic-finishing end of the concrete repair workflow, downstream of structural repair mortars like the Nafufill and Emcekrete families and upstream of protective/decorative systems such as EmceColor-flex and Betonflair W — Space Arc typically specs it alongside those products as one continuous repair-to-finish system rather than as a standalone patch compound. Specifiers comparing options do have a genuine equivalent outside the MC-Bauchemie range in Fosroc’s Renderoc FC, a similarly single-component, polymer-modified fairing coat pitched at the same blowhole-and-honeycomb-blinding job; a project already standardised on Fosroc’s Renderoc repair system, or one wanting a single-source structural-plus-finishing package from that brand, would reasonably choose Renderoc FC over Nafuquick, while projects already using MC-Bauchemie structural mortars are better served staying within the same system for compatibility and warranty continuity.
Fosroc Renderoc FC — A specifier already standardised on Fosroc’s Renderoc structural repair system, or wanting a single-brand repair-to-finish package, would reasonably choose Renderoc FC as the fairing coat instead of Nafuquick.
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