MC-Nafuplan HC
Rapid-Hardening Hydraulic Cement Plugging Compound for Instant Water Stop in Active Leaks — Hand-Applied Plug for High-Pressure Water Jets, Construction Joint Leaks, and Emergency Repair in Basements and Underground Structures India
Authorized Project Distributor — MC-Bauchemie India | Space Arc Engineering, Ghaziabad
Product Overview
MC-Nafuplan HC fills the immediate manual plug niche in the MC-Bauchemie waterproofing repair range — the simplest and most direct form of active water stop that requires no injection equipment, no mixing equipment, and no specialist training: the compound is mixed with water by hand to a thick, stiff mortar consistency, formed into a cone or plug shape by hand, and pressed firmly into the actively leaking hole, crack, or joint — held in place by hand pressure for 3 to 5 minutes while the hydraulic cement (aluminous or Portland cement with rapid-set accelerating admixture) achieves initial set against the water pressure in 1 to 5 minutes; the hardened plug then permanently blocks the water flow path. The chemistry of hydraulic cement plugging compounds like MC-Nafuplan HC is based on specially formulated Portland cement with a high C3A content and calcium aluminate additions that produce very rapid ettringite crystal formation on contact with water — the ettringite crystals form within 1 to 5 minutes and provide the early mechanical strength (2 to 5 MPa at 5 to 10 minutes) needed to hold the plug against water pressure up to 5 to 10 bar; the rapid-set chemistry is also expansive (the ettringite formation produces a slight volume increase) which presses the plug against the concrete substrate and improves the seal. In Indian construction practice, MC-Nafuplan HC is part of the standard kit for basement and underground structure waterproofing repair contractors — used alongside MC-Injekt FS (for larger cracks and joints) and MC-Protect 2KE (for overall waterproofing after all leaks are stopped); the three products form a complete emergency and permanent waterproofing repair system: HC plug for immediate mechanical stop of water jets and point leaks, FS foam injection for crack and joint sealing, and 2KE coating for overall waterproofing of the repaired surfaces. The simplicity of MC-Nafuplan HC application makes it suitable for use by maintenance and operations staff in building management (without specialist contractor expertise) for first-response water stop in monsoon season basement emergencies while waiting for the waterproofing contractor. Space Arc Engineering supplies MC-Nafuplan HC for emergency waterproofing repair, basement maintenance, and underground structure water stop in Ghaziabad, Noida, Delhi, and Uttar Pradesh.
Applications
- Instant water stop plug for high-pressure water jets in basement walls and floors — stopping of localized high-pressure water jets (0.5 to 5 bar, 0.1 to 0.5 litres per minute) through small-diameter holes (10 to 50 mm), cracks (2 to 15 mm width), and tie rod holes in basement retaining walls and raft slabs of buildings in Delhi NCR and Uttar Pradesh during monsoon season; the typical water jet in a basement concrete wall is caused by a discrete void or crack that concentrates the groundwater pressure at a single point (rather than distributed seepage through the full wall surface) and requires a plug material rather than an injection resin because the concentrated flow rate is high enough to wash out low-viscosity injection resins before they gel; MC-Nafuplan HC mixed stiff, shaped into a cone, and pressed into the hole while hardening under hand pressure stops even vigorous jets within 3 to 5 minutes
- Construction joint emergency stop before MC-Injekt FS injection treatment — stopping of active water flow through construction joints (horizontal joints at lift boundaries, vertical joints at day joints in continuous walls) in below-grade retaining walls, basement slabs, and underground structures where the joint gap is too wide or too actively flowing for injection packer placement; MC-Nafuplan HC is applied as a surface plug over the most active zones of the joint to slow or stop the water flow, allowing the injection packers to be drilled and installed without the water flowing through the packer hole during drilling and installation; after the HC plug has reduced or stopped the flow, MC-Injekt FS injection through the packers provides the full-depth joint seal; the HC plug and FS injection are complementary — HC works at the surface and FS works at depth
- Water stop at service penetrations through basement walls and floors — sealing of service penetrations (pipe sleeves, conduit entries, cable entries) through basement retaining walls and floor slabs where the annular gap between the sleeve or conduit and the concrete is a common water ingress path in Delhi NCR buildings; MC-Nafuplan HC packed firmly into the annular gap and allowed to set provides an immediate water-tight seal around the penetration, stopping the seepage or jet that occurs when the annular gap is exposed to positive water pressure
Key Advantages
- No equipment required — hand-applied plug for immediate first-response water stop by building staff — the defining advantage of MC-Nafuplan HC over all injection-based water stop methods (MC-Injekt 1K, MC-Injekt FS) is that no injection equipment, no drill, no packer, and no gun are needed; a maintenance technician or building operations staff member can stop an active water jet using only the MC-Nafuplan HC powder, a small container, water, and their hands — making MC-Nafuplan HC the correct first-response material for any building management team to stock in the maintenance room for immediate deployment when a basement leak appears during the monsoon at 2 AM on a Sunday before the waterproofing contractor arrives the next morning; the ability to provide immediate temporary water stop preserves the building from flooding damage and buys the time needed to deploy the permanent injection or waterproofing repair
- Initial set in 1 to 5 minutes against water pressure — the rapid-setting Portland cement and calcium aluminate chemistry of MC-Nafuplan HC is specifically formulated for the demanding mechanical requirement of setting against active water pressure while being held in place by hand; the key performance criterion is that the initial set must occur within 5 minutes of mixing and application (while the applicator can physically hold the plug in place against the water pressure) and must generate sufficient mechanical strength at that point to remain in position when hand pressure is released; MC-Nafuplan HC achieves initial set at 1 to 5 minutes and a plug compressive strength of 2 to 5 MPa at 10 minutes — sufficient to resist the 1 to 5 bar water pressure typical of Delhi NCR basement groundwater situations during peak monsoon
Technical Data
| Product Type | Rapid-hardening Portland cement and calcium aluminate-based hydraulic plugging compound — add water by hand at site |
| Application Method | Hand-mixed to stiff mortar, formed into plug shape by hand, pressed into the leak point and held for 3 to 5 minutes |
| Initial Set Time | 1 to 5 minutes from mixing at 25 degrees Celsius — hold plug in position for minimum 3 to 5 minutes |
| Compressive Strength at 15 minutes | 2 to 5 MPa — sufficient to resist basement water pressure of 1 to 5 bar |
| Compressive Strength at 24 hours | 20 to 30 MPa |
| Water Pressure Resistance | Up to 5 to 10 bar (50 to 100 metres water head) when correctly applied in a clean, prepared hole or crack |
| Maximum Application Temperature | Plus 35 degrees Celsius — at very high ambient temperatures mix with cold water and work faster as set time reduces |
| Post-Plug Treatment | MC-Nafuplan HC plug is a temporary water stop only — apply MC-Protect 2KE or MC-Protect 1K waterproofing coating over the plugged surface for permanent waterproofing |
Get a Quote
+91 9999155255 | info@space-arc.com | Space Arc Engineering, Sahibabad, Ghaziabad
Frequently Asked Questions
A property manager in Noida is managing a 2003-built 16-storey residential complex with a two-level basement (B1 and B2 parking) — every monsoon since 2019 water enters the B2 level through approximately 15 to 20 localized leaks (a mix of crack leaks, tie rod holes, and one construction joint at the base of the south retaining wall) causing approximately 50 to 80 mm of flooding on the B2 floor before it is pumped out — the waterproofing contractor has not been available for the last three years; the property manager wants to set up an in-house rapid response capability using MC-Nafuplan HC, MC-Injekt FS, and MC-Protect 1K and needs a step-by-step monsoon preparedness protocol and stock list for the maintenance store
Setting up an in-house monsoon rapid response waterproofing capability for this Noida basement is an excellent and practical property management decision — after three monsoon seasons of flooding, the property manager has accumulated enough first-hand knowledge of the leak locations to make effective repairs. Here is the complete monsoon preparedness protocol and stock list. Pre-monsoon survey (April to May — before monsoon onset in late June): conduct a full B2 basement inspection in dry conditions (typically February to April when groundwater is at its lowest); mark all visible crack locations, tie rod hole positions, and the construction joint at the base of the south retaining wall with permanent marker or coloured chalk on the wall face; photograph all marked locations with scale reference for record; estimate the severity of each leak from previous monsoon experience (is it a drip, a seep, or a jet at peak monsoon?). Stock list for the maintenance store (estimate for 15 to 20 leak points): MC-Nafuplan HC: 20 to 30 kg (for plugging all tie rod holes, crack jets, and the construction joint during the first emergency response); MC-Injekt FS: 20 cartridges of 330 ml (for injection of crack and joint leaks after HC plugging); MC-Protect 2KE two-component waterproofing: 40 to 50 kg Component A (liquid polymer) and 80 to 100 kg Component B (cement powder) for treating the full south retaining wall after leak stopping, plus spot coating over all repaired areas; small injection gun (manual for 330 ml cartridges): 1 unit; injection packers 13 mm: 30 pieces; rotary hammer drill with 13 mm bit: 1 unit (likely already in the maintenance store); rubber gloves, safety glasses, mixing buckets (5 litre): 6 pieces; electric paddle drill for MC-Protect mixing: 1 unit. Monsoon rapid response procedure — on the first day of water ingress (typically July): Step 1 (first 30 minutes): assess all visible leak points; use MC-Nafuplan HC to plug all active jets and high-flow point leaks first — mix a handful of HC with a small amount of water in a gloved palm (stiff consistency, not runny) and press firmly into each jet hole or tie rod hole; hold for 5 minutes; the maintenance technician can work alone on this step; Step 2 (following 2 hours): where HC plugging has reduced but not stopped the flow (this happens at cracks with large void behind the wall or at the construction joint), proceed to MC-Injekt FS injection — drill packer holes at 200 to 300 mm spacing along the still-seeping cracks, install packers, inject FS until flow stops; Step 3 (following day — when water flow is stopped or reduced to seepage): apply MC-Protect 2KE coating on the south retaining wall interior surface — 2 coats at 1.5 kg per square metre Component B per coat, mixed with Component A at specified ratio — over the full seepage-prone wall area (not just the repaired leak points); the 2KE coating converts the entire wall interior face into a waterproof membrane that stops the monsoon seepage that will inevitably find new micro-pathways after the obvious leaks are plugged. Annual improvement programme: with this in-house capability, the property manager can progressively eliminate the B2 basement flooding problem over 2 to 3 monsoon seasons by stopping the emergency leaks each year and systematically applying MC-Protect 2KE to increasing sections of the basement walls and floor each dry season (October to May); by the 3rd year, the full basement should be waterproofed to the point where the annual monsoon entry is negligible. Space Arc Engineering can supply all these materials in appropriate quantities for the Noida residential complex — contact +91 9999155255 for project-specific pricing and a pre-monsoon technical visit by our Noida technical representative.
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