MC-Bauchemie MC-Nafuplan EB
MC-Bauchemie’s SBS elastomeric-bitumen membrane for roofs, basements and buried structures that demand flexibility, root resistance and a long service life.
What is it?
A reinforced, SBS (elastomeric-bitumen) modified waterproofing membrane from MC-Bauchemie’s MC-Nafuplan range, supplied in rolls and bonded to the substrate by torch or self-adhesion.
Where is it used?
Flat roofs, terraces, podium decks, basement rafts and retaining walls, water tanks and buried structures across residential, commercial and infrastructure projects.
Why use it?
The SBS modification keeps the sheet flexible in cold and stable in heat, so it accommodates structural movement and thermal cycling without cracking or sagging.
How is it applied?
The substrate is primed with a compatible bitumen primer, then rolls are torch-fused (or peel-and-stick for self-adhesive grades) with staggered, fully lapped side and end joints.
About MC-Bauchemie MC-Nafuplan EB
MC-Nafuplan EB belongs to MC-Bauchemie’s MC-Nafuplan family of prefabricated bituminous waterproofing membranes. The “EB” designation marks it as an elastomeric-bitumen grade: the base bitumen is modified with SBS (styrene-butadiene-styrene) rubber rather than APP plastomers. That single choice defines the sheet’s behaviour. SBS gives the compound rubber-like elasticity, a low cold-flex point and the ability to stretch back over cracks and moving joints, which is exactly what a waterproofing layer on an Indian roof or basement has to survive through decades of day-night and seasonal cycling. The membrane is built around a dimensionally stable reinforcement carrier and finished for its intended exposure, so the same chemistry can be specified as a buried under-slab layer or an exposed top sheet depending on grade.
As an authorised MC-Bauchemie distributor and applicator, Space Arc Engineering positions MC-Nafuplan EB where a proven, factory-controlled sheet system makes more sense than a site-mixed liquid coating: large horizontal roofs and podiums, tanking to basement rafts and walls, and infrastructure decks where a consistent, verifiable membrane thickness matters. Sheet membranes remove the “how many coats and at what DFT” uncertainty of liquid systems because the waterproofing layer is manufactured to a fixed thickness before it reaches site. The trade-off is that the result lives or dies on lapping and torching discipline, which is why we treat MC-Nafuplan EB as a supply-and-applicator package rather than a material-only sale wherever the client allows it.
The technical insight
The engineering value of MC-Nafuplan EB sits in the SBS elastomer. Plain distilled bitumen is a thermoplastic that softens in heat and turns brittle in cold, so an unmodified bitumen felt is a poor long-term waterproofer. Blending SBS block copolymer into the bitumen creates a two-phase network: the rubbery butadiene mid-blocks give elastic recovery while the styrene end-blocks act as physical cross-links that hold the compound together. The practical outcome is a membrane that stays flexible at low temperatures and resists flow at high service temperatures, and that returns toward its original shape after being stretched. Over a shrinkage crack, a construction joint or a deck that flexes under load, the elastomeric compound bridges and follows movement instead of tearing. The reinforcement carrier inside the sheet carries tensile load and keeps the membrane dimensionally stable during torching and in service, so the bitumen is free to do the sealing while the carrier does the structural work. Because the sheet is manufactured to a controlled thickness, the specified waterproofing barrier is delivered uniformly across the whole area, with the only site-dependent variables being the primer bond and the quality of the fused laps.
Where it is used
- Waterproofing of flat and low-slope RCC roofs and terraces
- Podium decks and landscaped/planter areas over occupied space
- Basement raft slabs, retaining walls and buried tanking (below-grade)
- Water-retaining structures such as tanks and reservoirs
- Bridge decks, subways and cut-and-cover infrastructure
- Wet areas, sunken slabs and service floors requiring a robust sheet barrier
- Protection of buried concrete against ground moisture, chlorides and sulphates
- Re-waterproofing over sound existing bituminous systems during refurbishment
Key advantages
- SBS elastomeric modification delivers genuine crack-bridging and elastic recovery over moving substrates
- Factory-controlled thickness removes the coat-count and DFT guesswork of liquid systems
- Stays flexible in cold and stable in heat, suiting India’s wide temperature swings
- Fully bonded to the substrate, limiting lateral water tracking if the sheet is breached
- Resistant to ground salts, chlorides and sulphates for below-grade durability
- Fast to install over large horizontal areas once the crew and torching rhythm are set
- Trafficable for follow-on trades once protected, unlike slow-curing liquid membranes
- Backed by MC-Bauchemie system components, primers and detailing accessories
Limitations & considerations
- Torch-applied installation needs a trained crew and open-flame safety controls; not a DIY product
- Waterproofing integrity depends entirely on correctly formed, fully fused side and end laps
- Detailing at upstands, drains, pipe penetrations and corners is labour-intensive and error-prone if rushed
- Exposed grades need UV/mechanical protection or a screed/tile finish unless the sheet is mineral-surfaced for exposure
- Substrate must be sound, dry, primed and correctly falls-graded before any sheet is laid
- Cold or damp weather slows priming and torching and can compromise adhesion if forced
Selection & best practice
Start with the substrate: the deck must be structurally sound, cured, dust-free, dry and laid to correct falls, with all cracks and honeycombing repaired and internal corners coved. Prime with a compatible MC-Bauchemie bitumen primer and let it tack off fully before any sheet goes down. Set out so that laps run with the fall and are staggered between courses, and maintain generous side and end overlaps fully fused with even bitumen bleed at every seam as the visual proof of a sound weld. Reinforce all upstands, drains, gullies and penetrations with additional detailing pieces before the field membrane. For torch grades, control flame distance to melt the compound without burning the reinforcement; for self-adhesive grades, ensure firm rolled contact with no trapped air. Flood-test horizontal areas before covering, and protect the finished membrane promptly with a screed, board or protection layer wherever follow-on traffic or backfill is expected. Always confirm the specific grade, thickness, finish and primer against MC-Bauchemie’s current Technical Data Sheet for the project before ordering.
Specifications
| Product family | MC-Nafuplan (MC-Bauchemie reinforced bituminous membrane range) |
| Type | Prefabricated waterproofing membrane, supplied in rolls |
| Bitumen modification | SBS elastomeric bitumen (EB grade) |
| Modifier chemistry | Styrene-butadiene-styrene (SBS) block copolymer |
| Key behaviour | Flexible at low temperature, flow-resistant at high temperature, elastic recovery |
| Application method | Torch-fused or self-adhesive, fully bonded to primed substrate |
| Exposure | Buried/protected or exposed, depending on surface finish of the grade selected |
| Standards | Confirm CE / EN 13707 (roof) or EN 13969 (below-grade) classification against current TDS |
| Nominal thickness, roll size, tensile & cold-flex values | Grade-specific — verify against MC-Bauchemie’s current MC-Nafuplan EB Technical Data Sheet |
Industry use cases
High-rise residential
Waterproofing of terraces, podium decks and sunken slabs where a factory-controlled sheet thickness gives the client a verifiable, warranty-friendly barrier over occupied space.
Commercial and IT parks
Large flat roofs and landscaped podiums where sheet membranes cover big horizontal areas quickly and stay trafficable for follow-on MEP and finishing trades.
Basements and tanking
Raft slabs and retaining walls of deep basements where the SBS sheet’s ground-salt resistance and full bond protect buried concrete from moisture and chloride attack.
Infrastructure
Bridge decks, subways and cut-and-cover tunnels that flex under load and need an elastomeric membrane able to bridge movement without cracking.
Water-retaining structures
Tanks and reservoirs where a continuous, fully bonded bituminous barrier suits large, repetitive surfaces better than joint-heavy alternatives.
Frequently asked questions
Is MC-Nafuplan EB a sealant or a waterproofing membrane?
What does the ‘EB’ in MC-Nafuplan EB stand for?
How is the difference between SBS and APP membranes relevant to my project?
Can MC-Nafuplan EB be left exposed, or does it need protection?
Do you supply only the membrane, or install it as well?
What are the exact thickness, roll size and strength figures?
How we position MC-Bauchemie MC-Nafuplan EB
Within the MC-Bauchemie membrane range, MC-Nafuplan EB sits alongside the APP-modified MC-Nafuplan grades (such as the 404 series) for high-heat, UV-exposed roofs, and the self-adhesive MC-Nafuplan 15 SBS sheet for simpler unconfined areas; for pre-applied under-slab tanking the MC-Plan HDPE membranes (312/315 PA-IN) or the PVC MC-Plan 120 IN are the natural companions, with an MC bitumen primer completing the system. Where a project prefers a liquid-applied route over a sheet — tight, detail-heavy roofs, planters and wet areas — we cross-sell into brands we also carry: Fosroc’s Proofex and Nitoproof lines, Dr. Fixit and Sika liquid-membrane systems. Space Arc can specify whichever route genuinely fits the substrate, movement and exposure rather than defaulting to a single product.
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