Product Overview

MC-Protect 1K is a single-component polymer-modified cementitious waterproofing slurry from MC-Bauchemie that represents the practical simplification of flexible cementitious waterproofing for medium-complexity waterproofing applications in India. The product philosophy of MC-Protect 1K is to bring flexible cementitious waterproofing performance to a wider range of site conditions and applicator skill levels than the two-component MC-Protect 2KE: by factory pre-blending the polymer modifier (redispersible polymer powder) with Portland cement and selected graded fine filler in precise proportions, MC-Protect 1K requires only the addition of clean water at site to produce the working slurry consistency — eliminating the Component A to Component B liquid mixing ratio measurement that the MC-Protect 2KE requires. This single-component format is particularly valuable in Indian construction practice where small waterproofing crews, time pressure, and variable applicator training levels can make precise two-component ratio measurement unreliable in practice — with MC-Protect 1K, the only variable is the water addition, which the applicator can control intuitively by consistency observation. The waterproofing mechanism of MC-Protect 1K combines the cement matrix hydration and pore-blocking of rigid cementitious systems with the polymer film network formed by the re-dispersed RPP particles — the polymer film bridges fine cracks (up to 0.3 to 0.5 mm crack width bridging in the cured film) and provides flexibility for structures subject to minor thermal or moisture-induced movement without cracking the waterproofing layer; this crack bridging capability is the fundamental advantage over unmodified cementitious coatings, which are rigid and will crack at hair-crack widths of 0.05 to 0.1 mm. MC-Protect 1K is applied by stiff brush or trowel at 1.0 to 1.5 kg per square metre per coat (2 to 3 coats for typical waterproofing applications) to produce a total dry film thickness of approximately 1.5 to 2.5 mm — achieving water tightness under positive water pressure up to 3 bar (30 metres water head) when applied correctly to properly prepared surfaces. Space Arc Engineering supplies MC-Protect 1K for waterproofing of basements, water storage tanks, swimming pools, and plumbing wet areas in residential and commercial construction projects in Ghaziabad, Noida, Delhi, and Uttar Pradesh.

Applications

• Basement waterproofing in residential and commercial buildings — positive side (inner face) and negative side (outer face) waterproofing of basement retaining walls, raft slab floors, and below-grade external walls of multi-storey residential apartments, commercial complexes, and mixed-use buildings in Delhi NCR, Noida, Greater Noida, Gurgaon, and Ghaziabad where the basement is below the water table or in contact with moist soil; MC-Protect 1K is applied to the internal basement wall and floor surfaces in 2 to 3 coats after concrete surface preparation (chipping of fins and high spots, filling of construction joint cracks with a cementitious filler, pre-wetting of the substrate), providing a flexible, crack-bridging waterproofing layer that tolerates minor concrete cracking and differential settlement without creating new leak paths; the negative-side (water-pressure side) application of MC-Protect 1K on the basement interior face is the technically more demanding case — the coating must resist hydrostatic water pressure (typically 0.5 to 3.0 bar in typical Delhi NCR basements) from the outside pushing inwards through the concrete wall, and the bond between the coating and the concrete must resist this hydrostatic pressure tending to delaminate the coating from the substrate — making thorough surface preparation and firm application technique critical to success
• Potable and non-potable water storage tank lining — waterproofing and lining of above-ground and below-ground reinforced concrete water storage tanks (capacities from 5 cubic metres for a small residential overhead tank to 5,000 cubic metres for a commercial building underground sump) in Delhi NCR and Uttar Pradesh for both potable water supply and non-potable (fire fighting reserve, process water, cooling water) storage; MC-Protect 1K is formulated to be non-toxic after full curing (verified for potable water contact applications) and provides a smooth, hard, impermeable inner surface that prevents the concrete from absorbing stored water, prevents leakage, and prevents the concrete pore chemistry from affecting water quality; the flexibility for crack bridging is important for water tanks which undergo cyclic filling and emptying (causing small daily dimensional changes from the changing hydrostatic load) that can cause fine cracking in rigid cementitious tank linings over 5 to 10 years of service
• Swimming pool shell waterproofing before tile finish — waterproofing of the reinforced concrete shell of in-ground swimming pools (residential private pools and commercial hotel and club pools) in Delhi NCR before the installation of ceramic tile, mosaic, or fibreglass finish; the MC-Protect 1K waterproofing coat applied to the pool shell exterior face (positive side) and interior face (negative side) provides protection against water loss from the pool through fine cracks in the pool shell and protects the pool structure from the long-term chemical attack of chlorinated pool water on unprotected concrete; the flexible polymer modification allows the MC-Protect 1K coat to accommodate the small seasonal dimensional changes of the pool shell without cracking

Key Advantages

• Single-component add-water-only formulation for simplified site mixing and reduced operator error versus two-component systems — the factory pre-proportioning of all dry components (cement, polymer powder, fine filler) in MC-Protect 1K eliminates the Component A to Component B liquid ratio measuring step required by the MC-Protect 2KE two-component system; at the site level in Indian construction, this simplification translates to faster mixing, fewer mixing errors, and more consistent product performance across the full waterproofing area — particularly important on large waterproofing jobs with multiple mixing points (large basement, water tank, or swimming pool) where two-component ratio discipline can be difficult to maintain across all mixing gangs simultaneously; the single variable (water addition) is intuitive and self-correcting (too stiff = add slightly more water; too thin = add less water next mix)
• Flexible crack bridging up to 0.3 to 0.5 mm for structures subject to minor thermal and shrinkage movement — the RPP polymer network in the cured MC-Protect 1K film bridges fine cracks in the concrete substrate up to 0.3 to 0.5 mm width without the waterproofing layer cracking; this is the primary performance advantage over unmodified rigid cementitious coatings (which crack at 0.05 mm substrate crack width) and is critical in Indian construction where concrete shrinkage cracking (0.1 to 0.3 mm wide hair cracks) is near-universal in mass-poured basement and tank walls within the first 2 to 5 years; the flexible crack bridging ensures the waterproofing remains continuous and effective as the structure undergoes its natural early-age concrete shrinkage — without requiring repair or re-application