Product Overview

MC-Dur 1200 is a high-build, water-based elastomeric acrylic polymer coating from MC-Bauchemie designed as a comprehensive surface protection system for reinforced concrete structures under EN 1504-2 (Principles 1, 8, and 9 — protection against ingress, increasing resistivity, and moisture control). The elastomeric formulation is the key performance differentiator from the rigid anti-carbonation coatings in the MC-Bauchemie range: the cured MC-Dur 1200 film has a tensile elongation at break of 150 to 300 percent, providing genuine crack-bridging capability — the coating stretches to cover hairline cracks up to 0.3 to 0.5 mm width that open and close with thermal cycling, without the coating cracking and creating a moisture and CO2 ingress path at the crack location. This crack-bridging capability is critical because virtually all reinforced concrete structures develop thermal hairline cracks (surface concrete CTE produces 0.1 to 0.3 mm surface crack widths under diurnal temperature variation in Delhi NCR) — a rigid anti-carbonation coating spans these cracks initially but cracks itself at the concrete crack location within 1 to 2 years, negating the CO2 protection at the highest-risk points (the crack walls where CO2 penetrates most rapidly). The CO2 diffusion resistance of MC-Dur 1200 is characterised by its equivalent air layer thickness (sd value) — the thickness of still air that provides the same CO2 diffusion resistance as the applied coating dry film — MC-Dur 1200 at 300 to 400 micron DFT achieves sd greater than 50 metres (equivalent to 50 metres of still air CO2 diffusion resistance), which the European standard BBA/ETAG criteria classify as a high-performance anti-carbonation coating providing multi-decade protection to the reinforced concrete cover. Applied as a system (primer if required plus MC-Dur 1200 in two or three coats), the coating extends the time for the carbonation front to reach the rebar by 20 to 40 years depending on the original concrete cover depth, directly reducing the life-cycle cost of bridge and infrastructure maintenance through deferred rehabilitation. Space Arc Engineering supplies MC-Dur 1200 for bridge maintenance agencies, infrastructure coating contractors, and building facade restoration specialists across Ghaziabad, Delhi NCR, Noida, and Uttar Pradesh.

Applications

• Bridge and flyover anti-carbonation protection — applying MC-Dur 1200 to the pier columns, beam soffits, deck soffits, and abutment faces of reinforced concrete bridges and highway flyovers as a planned protective coating applied before significant carbonation depth has developed, to extend the service life of the bridge structure by 20 to 40 years and defer the high-cost structural repair phase that follows carbonation-induced rebar corrosion — the most cost-effective single bridge life-extension intervention available
• Residential and commercial building facade protection — coating the exterior reinforced concrete facade panels, column faces, balcony soffits, and exposed beam faces of residential and commercial buildings in Delhi NCR, where urban atmospheric CO2 concentrations (1000 to 2000 ppm in Delhi compared to the global average 420 ppm) accelerate carbonation rates by 2 to 5 times relative to rural concrete, making anti-carbonation coating a prudent protection investment for buildings above 10 years old
• Industrial building and plant structure protection — applying MC-Dur 1200 to reinforced concrete frames, walls, and soffits of industrial buildings, warehouses, and manufacturing plants where elevated CO2 from combustion processes and chemical fumes accelerates the carbonation of the structural concrete frame beyond the rate experienced in normal atmospheric conditions
• Retaining wall and sound barrier face protection — coating the exterior face of highway retaining walls, noise barrier walls, and metro viaduct retaining structures to protect the reinforced concrete from carbonation, chloride from highway de-icing or marine aerosol, and the UV and ozone degradation from prolonged outdoor exposure
• Post-repair surface protection over structural repair mortars — applying MC-Dur 1200 over the full concrete face of bridge piers, columns, and walls that have been structurally repaired with MC-Dur or MC-RocTec repair mortars, to seal both the repair area and the surrounding unrepaired concrete with a uniform protective coating that prevents further CO2 and chloride penetration to the repaired zone — completing the EN 1504-compliant repair system
• Water treatment plant and sewage structure external protection — coating the external above-grade faces of reinforced concrete water treatment structures, sewage treatment plant tankage, and pumping station walls where the combination of atmospheric CO2, high humidity, and biological activity accelerates concrete surface deterioration and where the elastomeric coating provides moisture resistance in addition to CO2 protection

Key Advantages

• Elastomeric crack-bridging capability — 150 to 300 percent tensile elongation at break allows the cured film to bridge hairline cracks up to 0.3 to 0.5 mm width without cracking — provides lasting CO2 protection at the most vulnerable points (concrete crack locations) where rigid coatings fail within 1 to 2 years of application — the defining technical advantage over rigid anti-carbonation paints for the Delhi NCR outdoor thermal environment
• High CO2 diffusion resistance — sd value greater than 50 metres at 300 to 400 micron DFT — equivalent air layer CO2 resistance classification: Class III (high) per EN 1504-2 — provides multi-decade carbonation protection that matches or exceeds the residual service life of existing bridges and buildings at the time of coating application
• EN 1504-2 compliant surface protection system — compliance with the European standard for concrete surface protection ensures that the coating meets rigorous performance testing requirements for CO2 diffusion resistance, water vapour permeability, adhesion, UV stability, chloride diffusion resistance, and crack-bridging — the specification standard increasingly referenced by NHAI and state PWD bridge maintenance manuals in India
• Water vapour permeable — elastomeric acrylic coating is water vapour permeable (Sd water vapour value within EN 1504-2 Class W2 limits) — allows concrete moisture to breathe outward while blocking CO2 and liquid water ingress — prevents osmotic blistering of the coating caused by trapped vapour pressure at the coating-concrete interface
• UV and weather stable — acrylic polymer binder provides good UV stability and colour retention for exterior exposure without the UV degradation and chalking of standard epoxy coatings — maintains protective performance and acceptable appearance over 10 to 15 year field exposure without significant performance degradation
• Roller and brush application — water-based, low-VOC formulation applied by standard masonry roller or brush without specialist spray equipment — simple application by trained painting contractors without specialist coatings applicator equipment — reduces application cost relative to two-component coatings requiring specialist spray systems