MC-Bauchemie MC-Pox 1K
A single-component solvent-borne epoxy primer that keys to damp concrete and steel without waiting for the substrate to fully dry, prepping surfaces for repair mortars, coatings and floor systems.
What is it?
A ready-to-use, single-component solvent-borne epoxy primer from MC-Bauchemie, formulated to bond to substrates that are still damp rather than bone-dry.
Where is it used?
On moisture-affected concrete and steel across basements, bridge substructures, water-retaining structures and industrial slabs before applying MC-Bauchemie repair, coating or flooring systems.
Why use it?
It removes the long drying wait that stalls jobs on Indian sites during and after monsoon, letting priming proceed on damp substrates while still delivering a sound key for the next coat.
How is it applied?
Prepare and clean the surface, then apply the primer by brush, roller or spray at roughly 4-6 m2 per litre; recoat within the stated window once it is tack-free.
About MC-Bauchemie MC-Pox 1K
MC-Pox 1K is MC-Bauchemie’s answer to one of the most persistent problems on Indian repair and flooring sites: substrates that never quite dry out. Whether it is a basement raft that keeps drawing moisture, a bridge pier splashed by a river, or a factory slab poured a few weeks ago, conventional epoxy primers demand a dry surface and refuse to bond when moisture is present. That waiting game costs days on the programme and often forces work into a narrow dry-season window. MC-Pox 1K is engineered to break that dependency. It is a single-component, solvent-borne epoxy primer that will key to damp concrete and steel, so surface preparation and priming can move ahead even when the substrate is still holding water.
As a distributor and applicator working across Delhi NCR and pan-India, Space Arc positions MC-Pox 1K as the tie-coat that lets a full MC-Bauchemie system go down on schedule rather than on the weather’s terms. Because it is single-component, there is no mixing ratio to get wrong and no pot-life clock ticking the moment two parts meet a bucket. Crews open the container and apply, which suits fast-moving repair works and large floor areas where consistent mixing across many batches is hard to police. It is designed to sit within MC-Bauchemie’s surface-protection and repair framework, so what follows on top, be it an epoxy repair mortar, a protective coating or a floor build-up, adheres to a primer that was made to work with it.
The technical insight
The reason ordinary epoxy primers fail on damp concrete comes down to physics at the pore wall. A film of moisture on the surface, or water sitting in the capillary pores, blocks the resin from wetting out the substrate and building the intimate mechanical and chemical grip that adhesion depends on; the primer beads, stays milky, or later disbonds. MC-Pox 1K is formulated with a solvent carrier that lets the reactive epoxy migrate into the damp pore structure rather than being repelled by it. As the solvent flashes off, it helps displace and carry surface moisture out of the way so the epoxy can reach the pore walls and cure into an anchored film, penetrating deeper than a surface-sitting sealer would. On steel, that same cured film wraps the metal and acts as a barrier, inhibiting the corrosion that would otherwise creep under a later coating. The practical envelope matters: the primer tolerates a genuinely damp substrate but not a wet or ponded one, and it cannot fight rising damp or active hydrostatic pressure pushing from behind the concrete. Within that envelope it converts a substrate you would normally have to dry out for days into one you can prime today.
Where it is used
- Priming damp concrete before epoxy repair mortars, protective coatings or resin floor systems
- Preparing basement rafts, retaining walls and underground structures that stay moisture-affected
- Priming bridge piers, abutments and substructure concrete exposed to splash and humidity
- Tie-coat on recently repaired or relatively young slabs that have not fully dried
- Corrosion-inhibiting prime coat on exposed steel and steel structures before coating
- Priming floors in water-adjacent industrial areas such as wash bays, dairies and food plants
- Kick-starting monsoon-season programmes where waiting for a dry substrate is not viable
- Prepping substrates ahead of MC-Bauchemie surface-protection and flooring build-ups
Key advantages
- Bonds to damp substrates, cutting the drying wait that delays priming on humid and post-monsoon sites
- Single-component and ready to use, so there is no mixing ratio to err on and no pot-life to race
- Solvent carrier drives the epoxy into the pore structure for a deep, anchored key rather than a surface skin
- Inhibits corrosion on steel, protecting the metal beneath subsequent coatings
- Formulated within MC-Bauchemie’s surface-protection and repair framework for reliable system compatibility
- Practical coverage of about 4-6 m2 per litre keeps material planning straightforward
- Tack-free in a few hours at normal site temperatures, so the next coat can follow the same day
- Backed by Space Arc’s supply and applicator support across Delhi NCR and pan-India
Limitations & considerations
- Tolerates a damp surface but not a wet, ponded or free-water substrate, which must be removed first
- Cannot overcome rising damp or active hydrostatic pressure pushing from behind the concrete
- Solvent-borne, so it needs adequate ventilation and fire precautions, and is less suited to poorly vented enclosed spaces
- It is a primer, not a standalone protective or waterproofing layer, and must be overcoated within the recommended window
- Coverage varies with substrate porosity and roughness, so rough or open concrete consumes more per litre
- Cold or very humid conditions can extend tack-free and overcoating times beyond the room-temperature figures
Selection & best practice
Get the substrate right first: mechanically prepare concrete to remove laitance, curing compounds and loose material, and grit-blast or clean steel to a sound, contaminant-free surface. The rule is damp, not wet, so mop or squeegee off any standing water and let a visibly wet surface come back to a matt-damp condition before priming. Apply MC-Pox 1K in a thin, even film by brush, roller or spray at roughly 4-6 m2 per litre, working it into the pores rather than flooding it on; open or very rough concrete will pull more material. Keep the area ventilated and observe solvent-handling and fire precautions. Then respect the overcoating window: recoat once the primer is tack-free and before the window closes, so the next layer chemically keys to a fresh primer. If the window lapses, roughen and re-prime rather than coating over a fully cured, contaminated film. On any structure with suspected rising damp or water pressure from behind, treat that source separately, as this primer is not a substitute for a waterproofing solution. When in doubt on a specific substrate or system build-up, Space Arc’s technical team can advise on the right MC-Bauchemie stack.
Specifications
| Product type | Single-component solvent-borne moisture-tolerant epoxy primer |
| Base chemistry | Reactive epoxy in a solvent carrier |
| Number of components | One (ready to use, no mixing) |
| Substrate suitability | Damp concrete and steel; surface-dry preferred, wet/ponded surfaces excluded |
| Coverage | Approx. 4-6 m2 per litre, depending on substrate porosity and roughness |
| Tack-free time | Approx. 2-4 hours at 23C |
| Overcoating window | Approx. 4-24 hours at 23C |
| Standards framework | Formulated to MC-Bauchemie’s EN 1504-2 / EN 1504-3 surface-protection and repair framework |
| Function on steel | Corrosion-inhibiting prime coat |
Industry use cases
Basements and underground structures
Priming rafts, retaining walls and tanking substrates that stay moisture-affected, so repair and coating works do not stall waiting for the concrete to dry.
Bridges and infrastructure
Preparing piers, abutments and substructure concrete exposed to splash and humidity ahead of protective coatings and repair mortars.
Industrial and food-grade floors
Priming slabs in wash-down, dairy and beverage areas where the floor is rarely fully dry, as a base for resin floor build-ups.
Steel structures and plant
Laying a corrosion-inhibiting prime coat on exposed steelwork before the protective coating system goes on.
Monsoon and fast-track repair programmes
Keeping priming moving through humid and post-monsoon conditions on sites where drying the substrate out first is not an option.
Frequently asked questions
Can MC-Pox 1K really be applied to damp concrete?
Will it stop water coming through my basement or slab?
Do I need to mix it before use?
What coverage should I plan for?
How soon can I overcoat it?
Is it compatible with other MC-Bauchemie systems?
How we position MC-Bauchemie MC-Pox 1K
MC-Pox 1K is the damp-substrate specialist in the priming line-up: reach for it when the surface will not dry out and a standard dry-only epoxy primer would fail. Where the concrete is genuinely dry, a conventional MC-Bauchemie two-component epoxy primer from the same MC-DUR family, or a water-dispersed variant for low-odour interiors, may be the more economical and lower-VOC choice, so match the primer to the moisture state of the substrate. Once primed, the coat above should be a compatible MC-Bauchemie repair mortar, protective coating or resin floor system for a warrantied build-up. From Space Arc’s wider shelf, buyers often pair this with a dedicated waterproofing membrane where rising damp or water pressure is the real problem the primer cannot solve, and with steel-priming or corrosion products where structural steel is involved. If you are standardising on Fosroc, the closest counterpart is Nitoprime 25.
Fosroc Nitoprime 25 — Choose this two-component solvent-based epoxy primer when the job is already standardised on the Fosroc Nitoflor, Nitocote and Nitomortar system, as it can likewise be applied on damp surfaces and keys concrete for those toppings.
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