MC-Bauchemie MC-RIM PW 201
The DVGW-tested reprofiling mortar MC-Bauchemie engineered specifically for drinking-water tanks, not adapted for them afterward.
What is it?
A single-component, cement-bound concrete replacement and reprofiling mortar, hand- or wet-spray-applied, built as the leveling layer of MC-Bauchemie’s MC-RIM PW potable-water tank system.
Where is it used?
Interior walls, ceilings and floors of drinking-water storage tanks, elevated/underground service reservoirs and water towers, ahead of a potable-water-safe topcoat.
Why use it?
It reinstates spalled or corroded concrete to a dense, low-permeability section while meeting DVGW drinking-water-contact testing and Germany’s DAfStb M3 mortar class — a bar a general repair mortar isn’t assessed against.
How is it applied?
Trowel/hand-applied or wet-spray machine-applied onto a prepared, saturated-surface-dry substrate, cured fully, then primed and finished with MC-RIM PW 101 or PW 301.
About MC-Bauchemie MC-RIM PW 201
{“para1″:”MC-RIM PW 201 is the reprofiling layer of MC-Bauchemie’s MC-RIM PW range, built for one job: bringing spalled, corroded or under-cover concrete inside a potable water tank back to a sound, dense section before a protective topcoat goes on. It’s a single-component, cement-bound mortar applied by hand or wet-spray, formulated to a low water/binder ratio and low entrained air so the repair stays dense rather than porous. Where an everyday patch mortar is tested for general structural performance, PW 201 is DVGW-tested for drinking-water contact and carries Germany’s DAfStb M3 mortar classification — a distinction that matters when the alternative is gambling on whether an unrelated mortar taints or leaches into a water supply.”,”para2″:”It’s a system product, not a standalone fix. On documented reservoir refurbishments — a 2,500 m3 tank in Oberwart, Austria and an 18,500 m3 tank in Sofia, Bulgaria — PW 201 leveled walls, ceilings and floors after old coatings were jetted off, then MC-RIM PW 101 finished the vertical/overhead surfaces and MC-RIM PW 301 finished the floor. Indian utilities and EPC contractors handling elevated or underground service reservoirs (ESRs/UGRs) follow the same sequence. Space Arc Engineering, an authorised MC-Bauchemie distributor and applicator for Delhi NCR and pan-India projects, supplies and applies the full MC-RIM PW system so contractors aren’t stitching compatibility across unrelated brands on a drinking-water asset.”}
The technical insight
MC-RIM PW 201 stays cementitious rather than resin-based because anything that can leach, off-gas or taint a sealed drinking-water vessel over years of contact is disqualified regardless of structural performance elsewhere. The formulation holds water/binder ratio at or below 0.50 and fresh air content under 5% by volume, with trowel or wet-spray placement chosen to minimise voids and maximise density. The DAfStb M3 classification signals this is assessed as a load-relevant structural repair mortar under German concrete repair principles, not a cosmetic skim coat — which is why utilities citing DVGW compliance treat it as like-for-like reinstatement rather than a stopgap.
Where it is used
- Reprofiling spalled concrete on tank/reservoir walls and ceilings before topcoat
- Elevated (ESR) and underground (UGR) service reservoir rehabilitation
- Restoring cover over exposed reinforcement in potable water structures
- Substrate leveling ahead of MC-RIM PW 101 or PW 301 coatings
- Wet-spray application for large-surface-area reservoir refurbishment
- Hand-applied patch repair in confined tank access chambers
- Concrete reinstatement in water treatment plant tanks and clarifiers
- Captive OHT/UGR repair for factories, townships and hospitals
Key advantages
- DVGW-tested for drinking-water contact, not a general mortar repurposed for the job
- Cement-bound chemistry avoids taint and leaching risks of unsuitable repair systems
- Low w/b ratio (≤0.50) and under 5% entrained air give a dense repair
- Carries Germany’s DAfStb M3 structural concrete-repair classification
- Same product works by hand for patches or wet-spray for full-reservoir jobs
- Purpose-matched to MC-RIM PW 101/301 coatings, removing cross-brand guesswork
- Proven on large reservoirs (2,500 m3 and 18,500 m3 documented projects)
- Backed in India by Space Arc’s authorised MC-Bauchemie supply and application service
Limitations & considerations
- Not a standalone finish — needs an approved MC-RIM PW topcoat for full protection
- Cementitious cure and flush-out time is needed before the tank returns to supply
- DVGW is a German scheme; confirm India-specific clearance with Space Arc per project
- A static reprofiling mortar, not crack-bridging — moving cracks need separate treatment first
- Wet-spray application needs a trained applicator for stated mortar-class performance
- Coverage and pack sizes aren’t published for India; get BOQ figures from Space Arc
Selection & best practice
Treat MC-RIM PW 201 as one stage of a system, not an isolated patch job. Jet or scarify back to sound concrete, saturate to surface-dry, and apply at the specified thickness — trowel for localised repairs, wet-spray for full reinstatement. Cure fully before priming and applying PW 101 or PW 301, and don’t compress the cure-and-flush schedule before the tank returns to supply. Loop in Space Arc early for current India compliance paperwork and applicator training.
Specifications
| Product type | Single-component cement-bound (Portland cement) concrete replacement/reprofiling mortar |
| Mortar classification | M3, per Germany’s DAfStb concrete repair principles directive |
| Application method | Hand/trowel-applied or wet-spray machine-applied |
| Water/binder ratio (w/c)eq | ≤ 0.50 as formulated/applied |
| Fresh mortar air content | < 5% by volume |
| Potable-water compliance | DVGW-tested (Germany); used to ÖVGW W347/W300 on Austrian reservoir projects |
| System role | Leveling/reprofiling base beneath MC-RIM PW 101 (wall/ceiling coating) or MC-RIM PW 301 (floor coating) |
| Typical substrate | Sound, prepared concrete in potable water tanks and reservoirs |
| Category | Concrete repair & rehabilitation |
Industry use cases
Municipal water utilities
Rehabilitating ageing service reservoirs without taking supply offline longer than necessary
Water treatment infrastructure
Restoring spalled sections on tanks and clarifiers in contact with treated water
Industrial & institutional campuses
OHT/UGR repair for captive water storage at factories and hospitals
EPC/turnkey reservoir contractors
Specifying one compatible leveling-plus-coating system instead of mixing unproven products
Government/PSU water boards
Meeting documentation requirements for potable-water-safe repair in tank-relining tenders
Frequently asked questions
Is MC-RIM PW 201 actually safe for drinking-water tanks?
Can PW 201 be used alone, without a topcoat?
What’s the difference between PW 201, PW 101 and PW 301?
Hand-applied or machine-applied?
What coverage and pack size should I budget for?
Does Space Arc supply and apply this across India?
How we position MC-Bauchemie MC-RIM PW 201
Specify MC-RIM PW 201 alongside MC-RIM PW 101 (wall/ceiling coating) and MC-RIM PW 301 (floor coating) as one drinking-water-safe system, with PW 40/80 spray mortar and shotcrete covering earlier-stage build-up on some projects. For general reinstatement without a potable-water requirement, MC-Bauchemie’s own Nafufill range or Fosroc’s Renderoc TG trowel-grade mortar are reasonable, more commonly stocked alternatives. But once drinking-water contact and DVGW-style compliance are non-negotiable, PW 201 is purpose-built for that exposure in a way a general repair mortar isn’t tested for.
Fosroc Renderoc TG — For general concrete reinstatement where drinking-water contact certification isn’t a project requirement, Renderoc TG’s Portland-cement trowel-grade repair mortar is a widely stocked alternative — but it isn’t DVGW-tested, so specifiers on potable-water reservoirs still default to MC-RIM PW 201.
Related Concrete Repair products
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.