MC-Protect 1K

Single-Component Polymer-Modified Cementitious Waterproofing Slurry — Brush-Applied Waterproofing Coating for Concrete, Masonry, and Render Substrates in Wet Rooms, Basements, and Water-Retaining Structures

Authorized Project Distributor — MC-Bauchemie India | Space Arc Engineering, Ghaziabad

Product Overview

MC-Protect 1K is a single-component, polymer-modified cementitious waterproofing slurry from MC-Bauchemie for brush-applied surface waterproofing of porous mineral substrates — concrete, masonry, blockwork, and cement render. The product is supplied as a factory-blended dry powder containing Portland cement, fine silica filler, polymer redispersible powders, and proprietary waterproofing additives that, when mixed with clean water on site, form a creamy, brushable slurry that is applied by stiff-bristle brush in two to three coats to produce a continuous, seamless waterproofing membrane. The polymer modification improves adhesion to the substrate, reduces drying shrinkage cracking in the applied coating, and provides limited flexibility to accommodate minor substrate movement. The single-component format of MC-Protect 1K — supplied as a dry powder requiring only water addition on site — distinguishes it from the two-component MC-Protect 2K (which requires polymer dispersion Component B mixed with cement powder Component A) and simplifies site logistics: only one pack to transport and store, no risk of wrong Component A to B mixing ratio, and consistent performance regardless of the water addition being within the specified range. The appropriate selection between MC-Protect 1K and MC-Protect 2K is governed by the required movement accommodation: MC-Protect 1K is a rigid waterproofing slurry with zero to very limited movement accommodation, appropriate for concrete and masonry substrates that are fully settled, aged, and subject to no differential movement — basement walls in established buildings, water tank walls and floors, swimming pool structures, and mature concrete substrates; MC-Protect 2K is a flexible two-component system with greater crack-bridging ability, appropriate for substrates with some residual movement risk, younger concrete construction, and balcony or podium deck applications where thermal movement creates cyclic coating strain. Space Arc Engineering supplies MC-Protect 1K for waterproofing contractors, tiling contractors, and civil construction companies across Ghaziabad, Delhi NCR, Noida, and Uttar Pradesh.

Applications

Wet room and bathroom waterproofing in residential buildings — application of MC-Protect 1K to the walls and floor of bathrooms, shower enclosures, and wet rooms in apartments and houses before tile fixing — the two-coat MC-Protect 1K system applied to the cement render or blockwork substrate provides a seamless, brush-applied waterproof barrier that prevents water migration through the tile joints and grout into the structural slab and wall, preventing the water damage, staining, and mould growth that is the most common building defect complaint in Indian residential construction
Basement waterproofing — negative-side and positive-side application of MC-Protect 1K to basement retaining walls and raft slabs to provide waterproofing against groundwater pressure — positive-side application (applied to the water-facing surface of the wall, ground side) is the preferred method as it uses water pressure to compress the waterproofing coating against the substrate; negative-side application (applied to the inner face of the basement wall) is used when access to the positive side is not available in existing basements suffering from water ingress — MC-Protect 1K has adequate hydrostatic pressure resistance for basement applications at typical Delhi NCR groundwater depths (2 to 5 metres, producing 20 to 50 kPa hydrostatic pressure)
Water tank waterproofing — lining of domestic and commercial potable water tanks, overhead tanks, and underground sumps in reinforced concrete construction — MC-Protect 1K is potable water safe after full curing (verify with manufacturer potable water approval certificate for the specific formulation) and provides a brush-applied internal lining coat that seals the porous concrete tank surface against water seepage and provides a cleanable, non-contaminating inner face for the water storage structure
Swimming pool waterproofing — application of MC-Protect 1K as the primary waterproofing layer to the concrete shell of swimming pools in residential, hotel, and institutional construction before tiling or fibreglass finish application — the pool shell concrete is typically poured with controlled concrete quality but still contains shrinkage cracks, tie-bolt pockets, and construction joint locations that require a continuous waterproofing layer before the tile or render finish is applied
Retaining wall and earth-retaining structure waterproofing — external face waterproofing of reinforced concrete retaining walls in building basements and civil infrastructure where the external face is waterproofed before backfill to prevent groundwater percolation through the wall — MC-Protect 1K applied in three coats on the external face of the retaining wall, combined with a drainage layer and drainage pipe at the wall base, provides a comprehensive retaining wall waterproofing system

Key Advantages

Single-component simplicity — supplied as a dry powder requiring only water addition on site — no Component A and Component B mixing ratio to control, no risk of partial reaction from incorrect ratio, consistent performance across the full project duration regardless of the applicator — the single-pack format is particularly advantageous for residential projects and small-scale waterproofing where multiple packs of the same product may be opened over several days by different workers
Brush application — no specialist equipment required — the slurry consistency allows application by any stiff-bristle brush with no specialist spray or trowel application equipment — making MC-Protect 1K accessible to small waterproofing contractors and tiling contractors who add waterproofing to their service offering without spray equipment investment
Negative-side and positive-side capability — the rigid cementitious waterproofing system resists hydrostatic pressure from both sides — positive-side application (water-facing) provides the maximum waterproofing performance; negative-side application resists hydrostatic pressure from the non-water-facing side, enabling remedial waterproofing of basement walls where the external face is inaccessible — an important advantage for existing building renovation in dense urban locations
Excellent substrate compatibility — bonds strongly to concrete, masonry, blockwork, and cement render without a separate primer in most conditions — the cementitious chemistry of MC-Protect 1K is inherently compatible with mineral construction substrates, providing reliable adhesion and chemical compatibility with the substrate over the coating service life
Vapour-permeable after cure — the rigid cementitious waterproofing system is not an impermeable vapour barrier — it allows controlled vapour transmission while preventing liquid water penetration — important for basement applications where a completely impermeable coating on a retaining wall could trap moisture in the wall and cause blistering or spalling of the coating in freeze-thaw conditions (not common in Delhi NCR but relevant for hill station and Himalayan foothills projects)

Technical Data

Type	Single-component polymer-modified cementitious waterproofing slurry — dry powder, site-gauged with water
Mixing	Add powder to clean water — mix with slow-speed paddle drill for 3 minutes to lump-free creamy slurry — do not over-water
Application	Stiff-bristle brush in 2 to 3 coats — allow each coat to reach initial set before applying next coat (typically 4 to 8 hours at 25 degrees Celsius)
Coating Thickness	2 to 3 mm total dry film thickness — minimum 2 coats of 1 to 1.5 mm each
Hydrostatic Resistance	Resistant to positive and negative hydrostatic pressure up to 5 bar (50 metres water head) for correctly applied 3-coat system
Coverage	Approximately 1.5 to 2.0 kg per square metre per coat — 3.0 to 4.0 kg per square metre for 2-coat system
Minimum Substrate Strength	Concrete C20 minimum — masonry and render must be sound and free from weak laitance and loose material
Curing	Keep moist for minimum 72 hours after final coat application — protect from direct sun and wind during curing in Indian summer conditions

Get a Quote

+91 9999155255 | info@space-arc.com | Space Arc Engineering, Sahibabad, Ghaziabad

Frequently Asked Questions

A homeowner in Ghaziabad is renovating a ground-floor apartment with two bathrooms that have experienced recurring water leakage into the flat below — the tiling contractor has quoted for removing the existing tiles, applying MC-Protect 1K waterproofing, and re-tiling — the homeowner asks: what is the correct application procedure for MC-Protect 1K in a bathroom before tiling, where are the critical waterproofing details that are most often missed, and how long must they wait before tiling can begin?

Bathroom waterproofing before tiling is the single most common waterproofing application in Indian residential construction and the most common source of leakage complaints — water damage to the flat below is typically caused by either no waterproofing being applied before tiling, or waterproofing being applied but with critical details missed that create leak paths at junctions, penetrations, and corners. Here is the complete procedure for your Ghaziabad apartment bathrooms. Surface preparation — critical first step: the existing cement render on the bathroom walls and floor must be sound, firm, and free from loose or hollow areas before MC-Protect 1K can be applied — the waterproofing coating is only as good as its bond to the substrate, and a hollow or delaminating render beneath the coating will fail regardless of how good the coating is; test the entire render surface by tapping with a metal bar or hammer — a hollow sound indicates delamination — hack out and replace all hollow render with fresh cement mortar and allow to cure for minimum 7 days before waterproofing; the substrate must be clean and free from oil, paint, curing compound, and surface contamination. Mix preparation: measure clean water into a clean bucket (quantity as specified on the product data sheet for the bag size — typically 5 to 6 litres per 20 kg bag); add the MC-Protect 1K powder slowly to the water while mixing with a slow-speed drill paddle mixer (400 to 600 rpm) — add powder to water, not water to powder — mix for 3 minutes until a lump-free, creamy slurry consistency is achieved; do not add extra water after the slurry is mixed — excess water reduces waterproofing performance and strength. First coat application: pre-wet the render surface with clean water by spray or sponge before applying the first coat — the damp substrate prevents the dry render from absorbing water from the freshly applied slurry too rapidly, which would prevent adequate bond; apply the first coat with a stiff-bristle brush (not a paint brush — stiffness is required to work the slurry into the surface pores); apply generously in a scrubbing motion to ensure full pore filling and good bond — the first coat should be approximately 1 to 1.5 mm thick; cross-hatch the first coat surface with a notched float or scratch comb while still workable to provide a mechanical key for the second coat. Critical details — the most commonly missed steps: wall-to-floor junction — this is the highest-risk location for water ingress in bathroom waterproofing; the junction between the wall render and floor screed must be reinforced with a strip of alkali-resistant (AR) glass fibre fabric (AR mesh tape, 100 to 150 mm wide) embedded in the first coat at the junction before the second coat is applied; bed the AR mesh into the first coat at the wall-floor junction while the coat is still wet, pressing it firmly into the corner with a brush or spatula; the mesh reinforcement prevents the rigid cementitious coating from cracking at the internal corner, which is the highest-stress point for differential movement between the wall and floor; pipe penetrations — wherever water supply pipes, drain pipes, or overflow pipes penetrate the bathroom walls or floor, the penetration junction must be waterproofed with an elastomeric sealant or pre-formed pipe collar before the cementitious coating is applied — the pipe is a rigid penetration in a flexible-ish coating and will create a crack path at the pipe perimeter under thermal movement; apply a bead of MC-Nafuplan EB or similar PU sealant around each pipe penetration, allow to cure, then apply the cementitious coating over it — do not rely on the cementitious slurry alone to seal pipe penetrations; floor drain junction — the floor drain body is a rigid metal component embedded in the floor screed; waterproof around the drain perimeter in the same manner as pipe penetrations — apply sealant or a pre-formed drain collar, then apply cementitious coating up to and slightly overlapping the drain body flange. Second coat application: allow the first coat to reach initial set — touch-firm but not fully dry, typically 4 to 8 hours at 25 degrees Celsius; apply the second coat in the opposite brush direction to the first coat (if first coat was applied horizontally, apply second coat vertically) to ensure full coverage; second coat at 1 to 1.5 mm, producing a total system thickness of 2 to 3 mm. Third coat in shower area: in the shower area and around the shower drain — apply a third coat for additional insurance in the highest water-exposure zone. Flood test before tiling: before tiling, perform a flood test — seal the floor drain temporarily with a bung or plastic bag sealed with tape; fill the floor of the bathroom to a depth of 50 mm with clean water; leave for 24 to 48 hours; check the ceiling of the flat below for any wet patches or seeping — if the flood test passes, the waterproofing is complete. Tiling start time: minimum 72 hours after the last coat for standard conditions (25 degrees Celsius, 50 to 60 percent RH) — in Indian summer heat (35 to 40 degrees Celsius), the surface cures faster but deeper cure may still require 72 hours; do not tile in less than 72 hours as the tile adhesive moisture may affect the still-curing waterproofing; for pool and water tank applications, allow 7 days minimum before water filling or tile adhesive application. Space Arc Engineering supplies MC-Protect 1K for bathroom and wet room waterproofing contractors in Ghaziabad, Delhi NCR, Noida, and Uttar Pradesh — contact +91 9999155255.

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Space Arc Engineering is an Authorized Project Distributor for MC-Bauchemie India serving Delhi NCR, Ghaziabad, Noida and Uttar Pradesh.

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Space Arc Engineering is an authorized MC-Bauchemie distributor & applicator in Delhi NCR & pan-India. Fast quotes, datasheets and on-site support.

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