Product Overview

MC-Dur 1100 is a penetrating hydrophobic impregnation from MC-Bauchemie based on a blend of silane (alkyltrialkoxysilane) and siloxane (polydimethylsiloxane) active ingredients in a solvent or water carrier. The distinction between MC-Dur 1100 and film-forming concrete protection products (coatings such as MC-Dur Elastic or MC-Dur 1200) lies in the mechanism of action: a coating forms a protective film on the concrete surface that provides a barrier against water, CO2, and chlorides by blocking the surface pores with a continuous polymer film — the film changes the surface appearance (adding sheen or colour) and reduces vapour permeability; MC-Dur 1100 penetrates the concrete pore system (capillary and micro-capillary pores) to a depth of 2 to 5 mm and chemically bonds the silane-siloxane molecule to the pore wall silica surfaces through a condensation reaction, lining the pore walls with a hydrophobic organic layer without blocking the pores — the treated pores repel liquid water (water contact angle above 120 to 140 degrees on the treated surface) but remain open to water vapour diffusion; the concrete surface appearance is unchanged (no sheen, no film, no colour change) and the substrate breathes exactly as before treatment. The practical advantages of this mechanism for Indian construction: concrete facade surfaces treated with MC-Dur 1100 bead water on contact (dramatically reducing the wetting time and therefore the capillary water absorption rate), reducing chloride ingress in marine and de-icing salt environments, reducing carbonation rate (wet concrete carbonate faster than dry concrete), and reducing freeze-thaw damage (which requires water-saturated concrete pores to initiate); the invisible treatment is preferred by architects and building owners who wish to maintain the natural concrete or brick appearance without the aesthetic impact of a visible coating. Space Arc Engineering supplies MC-Dur 1100 for facade protection contractors, structural durability consultants, and infrastructure maintenance agencies in Ghaziabad, Delhi NCR, Noida, and Uttar Pradesh.

Applications

• Chloride penetration barrier treatment for reinforced concrete in coastal and industrial environments — application of MC-Dur 1100 to reinforced concrete bridges, elevated highways, flyovers, and coastal building facades in environments with chloride exposure from sea spray, industrial chemical fallout, or de-icing salt in cold northern Indian winter road maintenance; the hydrophobic impregnation reduces the rate of chloride-laden water absorption into the concrete pore system by up to 90 to 95 percent versus untreated concrete, dramatically slowing the advance of the chloride front toward the reinforcement and extending the initiation time for chloride-induced corrosion; MC-Dur 1100 is classified as a principle 1 method 1.3 product (restore or increase concrete resistivity) and principle 2 method 2.3 product (hydrophobic impregnation) under EN 1504-2 for concrete surface protection
• Bridge deck and parapet wall protection against water and chloride ingress — application to the vertical faces and soffits of reinforced concrete bridge parapets, crash barrier upstands, and bridge abutment wing walls where the combination of driving rain and spray from vehicles in rainy season creates intense wetting and drying cycles that accelerate chloride and carbonation ingress; the invisible appearance of MC-Dur 1100 treatment is required by road authorities (NHAI, PWD, MES) who specify hydrophobic impregnation for bridge concrete to avoid the visual impact of a visible coating that would require frequent maintenance and repainting
• Concrete and brick facade protection for heritage and architecturally exposed concrete buildings — application to exposed architectural concrete panels, precast concrete cladding, and facing brick in building facades where the substrate appearance must be preserved and a visible coating is aesthetically unacceptable; in Delhi NCR, many government buildings, heritage precast structures, and premium residential buildings with exposed concrete design require a protective treatment that does not change the facade colour or texture; MC-Dur 1100 provides this invisible protection, repelling rain water and reducing surface soiling from airborne particulates that are deposited and retained on wet concrete surfaces (Delhi NCR has very high airborne dust and particulate pollution that causes accelerated surface darkening on untreated facades)
• Freeze-thaw resistant concrete treatment for Northern India winters — application to concrete surfaces in Uttar Pradesh, Delhi NCR, and North Indian hill states where winter temperatures fall below zero degrees Celsius and water-saturated concrete pores are subject to freeze-thaw damage (water expands 9 percent by volume on freezing — if the concrete pores are more than 91 percent full of water, the freezing expansion exceeds the tensile strength of the concrete and causes internal microcracking and surface scaling); MC-Dur 1100 reduces the degree of water saturation in the concrete pore system by preventing liquid water absorption, protecting the concrete against freeze-thaw damage in exposed locations such as parapet walls, copings, and floor surfaces
• Masonry and natural stone facade protection in commercial and residential buildings — application to external clay brick facades, natural stone (sandstone, limestone, marble) facades, and concrete block walls in commercial and residential buildings where the masonry must be protected from rain penetration and surface soiling while preserving the natural appearance and colour of the masonry units; silane-siloxane impregnation is the standard treatment specified by masonry facade contractors and architects in India for high-quality brick and stone buildings where paint or coating would be architecturally unacceptable

Key Advantages

• Invisible treatment — preserves natural concrete and masonry appearance — the single most important property distinguishing penetrating hydrophobic impregnation from coating-based protection systems for applications where facade aesthetics must be maintained; after application and drying, the treated surface looks identical to the untreated surface in dry conditions (the water-repellent effect is visible only when rain hits the surface and beads off); architects, heritage conservation consultants, and institutional building clients consistently specify hydrophobic impregnation over coatings specifically because of this invisible characteristic
• Deep penetration to 2 to 5 mm — protected even if surface is mechanically worn — the active silane molecules penetrate significantly below the concrete surface, meaning the hydrophobic protection layer is not removed by surface abrasion, light weathering, or high-pressure washing that would strip a surface coating; in practical terms, a concrete surface treated with MC-Dur 1100 retains effective water repellency for 10 to 15 years under normal exposure conditions without reapplication — one-time treatment cost versus recurring paint maintenance cycles
• Fully vapour-permeable (breathable) — does not cause blistering or condensation in substrate — unlike film-forming coatings that can trap moisture in the concrete and cause blistering or spalling if applied to wet or damp substrates, MC-Dur 1100 does not significantly reduce the water vapour permeability of the concrete; water vapour generated within the building or structure (from breathing, cooking, industrial processes, or concrete drying) can escape through the treated concrete surface without being blocked; this breathability also prevents the condensation-driven salt effloresence and freeze-thaw damage that occurs behind non-breathable surface coatings
• EN 1504-2 compliance for concrete surface protection — tested and classified under EN 1504-2 for hydrophobic impregnation (method W.2 — water absorption reduction test by EN ISO 15148 or EN 13580) — providing specification compliance for bridge and infrastructure projects specified under EN 1504 system requirements for concrete surface protection in Indian infrastructure projects following European standards or MORTH specifications