About MC-Bauchemie Konudur HL 11 PVC

Konudur HL 11 PVC is worth introducing carefully, because despite sitting in MC-Bauchemie’s “repair” vocabulary, it behaves nothing like a trowel-applied mortar or brush-on coating. It is a needle-felt polyester hose faced with an elastic PVC foil, sold as the structural liner component of MC-Bauchemie’s OMBRAN Underground Sewer Systems range for cured-in-place-pipe (CIPP) rehabilitation. Contractors impregnate the felt with a compatible Konudur resin, invert the wet-out hose into the host pipe under air or water pressure, press it out against the old pipe wall, and cure it into a rigid new pipe sitting snugly inside the damaged one. The PVC foil faces outward during inversion and becomes the smooth interior surface of the finished liner once everted.

The application is deliberately narrow: non-accessible, non-man-entry sewer and drain lines where open-cut replacement would mean tearing up a road, factory floor, or live utility corridor. MC-Bauchemie rates the hose’s arc mobility at 45 degrees, so it can be pulled through a real bend in the pipe run without kinking or delaminating. For Space Arc’s Delhi NCR and pan-India customers, this is a project-sourced item, quoted against a specific municipal, industrial, or infrastructure trenchless job, rather than shelf stock, and we say that upfront so specifiers know what to expect.

The technical insight

The two-layer construction is easy to undervalue. The polyester needle-felt core is the absorbent, load-bearing matrix: its non-woven structure wicks resin evenly through the full thickness during impregnation, giving the cured liner a consistent wall and avoiding resin-starved patches that cause premature failure. The PVC foil skin does two jobs at two stages. During wet-out and inversion it is the tight, non-porous barrier that stops resin bleeding out before it reaches the pipe wall, and it keeps residual groundwater from washing out or diluting that resin. Once everted and cured, the same foil becomes the smooth, low-friction bore the new pipe carries flow on. The 45-degree arc mobility figure is how MC-Bauchemie communicates how much directional change the hose absorbs without stressing the felt-foil bond, which is the number a design engineer actually needs when planning a run with a bend in it.

Where it is used

• Trenchless rehabilitation of non-man-entry sanitary sewer lines under roads and built-up plots
• Relining of storm-water drains and box culverts where excavation would disrupt traffic
• Restoration of underground process or effluent ducts inside industrial and institutional campuses
• Municipal trunk-sewer CIPP projects run under smart-city and urban local body programmes
• Rehabilitation of pipe runs with moderate bends, within the hose’s 45-degree arc mobility
• Utility-corridor conduits where the alignment is inaccessible for open-cut work
• Emergency lining of collapsed, cracked, or root-intruded sewer sections found by CCTV survey
• Sealing chronic infiltration/exfiltration in ageing underground drainage networks

Key advantages

• Fully trenchless installation, so roads and live utility corridors stay open through the works
• Outer PVC foil gives a smooth, chemically resistant finished bore once the liner cures
• Needle-felt core impregnates evenly, reducing resin-starved voids that shorten liner life
• 45-degree arc mobility lets the hose negotiate real bends without kinking
• Works across MC-Bauchemie’s Konudur resin range, matching cure profile to site conditions
• Restores structural strength and hydraulic performance together, cutting infiltration and root ingress
• Usually faster and less disruptive than dig-and-replace, especially under live roads or plant floors
• Backed by MC-Bauchemie’s dedicated OMBRAN underground-systems engineering support

Limitations & considerations

• A specialist CIPP system, not a mason-applied product; needs an inversion rig, curing equipment, and a trained lining crew
• The hose alone does not perform; it must be paired with the correct Konudur resin for diameter, length, and cure method
• A CCTV condition survey, cleaning, and bypass pumping are prerequisites, not optional extras
• MC-Bauchemie’s public product page does not list roll diameter, length, or working-pressure data; confirm these project-by-project with the manufacturer’s technical team
• Sourced and cut to order against a specific diameter and run length, so it cannot be stocked like a bagged mortar
• Positioned for non-man-entry lines; larger man-entry sewers typically call for a different MC-Bauchemie approach

Selection & best practice

Specifications

Industry use cases

How we position MC-Bauchemie Konudur HL 11 PVC

Konudur HL 11 PVC sits inside MC-Bauchemie’s OMBRAN Underground Sewer Systems family alongside its polypropylene-faced sibling, Konudur HL 11 PP, and the Konudur resin range (including thermo-reactive systems) that impregnates either hose; the PVC face is generally chosen where a smoother inner bore and different resin compatibility are wanted over the PP variant. It is a genuinely different product family from the concrete repair mortars, waterproofing membranes, and structural strengthening systems that make up most of Space Arc’s repair catalogue, and should be scoped as a standalone trenchless-lining project rather than folded into a general repair BOQ. There is no true Fosroc equivalent to name here: Fosroc’s portfolio covers concrete repair, waterproofing, flooring, and grouting chemicals, not CIPP sewer-lining textiles, so specifiers comparing options for this specific scope should look at other trenchless-lining manufacturers, not a same-category Fosroc product.

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