STP ShaliBond ST
The cold-applied cementitious adhesive that anchors STP SuperTene waterproofing membrane to concrete roofs and podiums, without a torch, flame or hot bitumen kettle on site.
What is it?
A single-component, polymer-modified cementitious adhesive from STP Limited. It arrives as a dry powder that you gauge with clean water on site to make the bonding layer for SuperTene bituminous membrane.
Where is it used?
On structural concrete roof slabs, terraces and podium decks where a fully-bonded self-adhesive membrane system is being laid instead of a torch-applied one.
Why use it?
It removes the LPG torch and hot-bitumen kettle from the roof, so waterproofing can proceed safely on occupied buildings, near combustibles and in tight urban sites across Delhi NCR.
How is it applied?
Prepare and prime the slab, mix the powder with water to a lump-free slurry, trowel or brush a uniform bed onto the concrete, then roll the SuperTene membrane into the wet adhesive and press out air.
About STP ShaliBond ST
STP ShaliBond ST is the cementitious bonding layer that makes a cold-applied SuperTene roof possible. It is a single-component, polymer-modified powder: the polymer content gives the set film flexibility and grip on concrete, while the cementitious base develops a genuine chemical and mechanical key into the slab as it cures. On site the crew simply adds clean water, mixes to a smooth slurry, and the material becomes a workable adhesive bed for the membrane. There is no flame, no molten bitumen and no bonding solvent involved, which is exactly why specifiers reach for it on jobs where hot work is a problem.
STP Limited, the erstwhile Shalimar Tar Products, has been supplying the Indian waterproofing trade for more than eighty-five years, and ShaliBond ST sits inside its wider SuperTene ecosystem alongside the ShaliTex primer and the SuperTene SBS-modified self-adhesive membrane itself. As an authorised STP distributor and applicator, Space Arc Engineering supplies ShaliBond ST as a system component rather than a standalone product. It is not a coating, not a repair mortar and not a general tile adhesive; its single job is to bond SuperTene reliably to a concrete substrate. Understood and used that way, it gives contractors a clean, low-risk method of building a fully-adhered membrane roof.
The technical insight
The value of ShaliBond ST is in how it resolves the oldest weakness of self-adhesive membrane roofing: the bond to green or dusty concrete. A pure pressure-sensitive membrane relies on the tack of its own bitumen against the slab, and that tack is easily defeated by surface laitance, fine dust, residual moisture or a slightly cold slab. ShaliBond ST inserts a cementitious interlayer instead. Because it is cement-based, it hydrates into the concrete pore structure and cures as part of the substrate, while the polymer modification keeps the cured film flexible enough to move with the deck and to accept the membrane’s bitumen face. The membrane is rolled into this bed while it is still wet, so you get intimate, air-free contact and a bond that is chemically anchored below and adhesively gripped above, rather than a single tacky interface that can peel. That interlayer is also why the system stays cold: the adhesion energy comes from cement hydration and polymer film formation, not from heat, so nothing on the roof has to be melted or flamed.
Where it is used
- Fully-bonded SuperTene membrane waterproofing on RCC roof slabs
- Terrace and podium deck waterproofing over occupied or sensitive buildings
- Cold-applied membrane roofing where LPG torches and hot bitumen are prohibited
- Waterproofing near stored combustibles, timber, insulation or working services
- Retrofit and re-waterproofing of existing concrete roofs without hot work
- Membrane bonding on projects with strict site fire-safety or hot-work-permit regimes
- Concrete substrates in the SuperTene system after ShaliTex priming
- Residential, commercial and institutional roof-slab waterproofing programmes
Key advantages
- Eliminates the torch and hot-bitumen kettle, cutting fire risk on the roof
- Single-component powder gauged only with clean water on site
- Polymer modification gives the cured bond flexibility, not brittle rigidity
- Cementitious base keys chemically into the concrete substrate
- Purpose-matched to STP SuperTene membrane as an engineered system
- Low-odour, cold process suited to occupied and urban buildings
- No specialist heating plant or flame-handling crew required
- Backed by STP’s 85-plus years in the Indian waterproofing market
Limitations & considerations
- A system component only, meant specifically for bonding SuperTene, not a general-purpose adhesive
- Not a waterproofing layer in itself, the membrane provides the barrier, not the adhesive
- Cementitious set needs adequate cure and ambient temperature, so cold or very wet conditions slow it
- Requires a sound, primed, laitance-free concrete substrate to develop full bond
- Being water-gauged, it must be mixed fresh and used within its working time
- Consumption and coverage vary with slab texture and bed thickness, so confirm project quantities from the current STP TDS
Selection & best practice
Start with the substrate: the slab must be structurally sound, cured, and free of laitance, dust, oil and loose material, with any surface irregularities made good. Prime the concrete with STP ShaliTex primer per the system sheet and let it develop before adhesive goes down. Gauge ShaliBond ST with clean water and mix mechanically to a smooth, lump-free slurry, then apply an even bed to the primed slab using a trowel or brush at a consistent thickness. Roll the SuperTene membrane into the wet adhesive immediately, working from one edge and pressing firmly to expel trapped air, and maintain the correct side and end laps. Protect fresh work from rain and foot traffic until the bond has cured, and always cross-check mixing water, bed thickness and coverage against the latest STP technical data sheet for the specific membrane grade being laid. On critical decks, run a small trial area first to confirm bond and working time under the actual site temperature.
Specifications
| Product type | Single-component polymer-modified cementitious adhesive |
| Brand / manufacturer | STP Limited |
| Supplied as | Dry powder, gauged with clean water on site |
| Cure mechanism | Cement hydration plus polymer film formation (cold, no heat) |
| Primary function | Bonding SuperTene membrane to concrete substrates |
| Compatible membrane | STP SuperTene SBS-modified self-adhesive bituminous membrane (1.5 mm & 2.0 mm) |
| System primer | STP ShaliTex primer on concrete before adhesive |
| Application method | Cold-applied; trowel/brush bed, membrane rolled in wet — no torch or hot bitumen |
| Typical substrate | Structural RCC roof slabs, terraces and podium decks |
Industry use cases
Residential & Housing
Waterproofing terrace and roof slabs on apartments and independent homes where a flame-free method is preferred over occupied floors.
Commercial & Institutional
Podium and roof decks on offices, malls, schools and hospitals that enforce hot-work permits and site fire-safety rules.
Retrofit & Rehabilitation
Re-waterproofing ageing concrete roofs on live buildings where a torch-applied membrane would be unacceptable.
Fire-Sensitive Sites
Roofs adjacent to stored combustibles, insulation, timber or working services where cold bonding is a safety requirement.
Urban Delhi NCR Projects
Congested city sites where handling LPG cylinders and hot bitumen on the roof is impractical, so a water-mixed adhesive is used instead.
Frequently asked questions
What exactly is ShaliBond ST used for?
Do I need a torch or hot bitumen to use it?
Is ShaliBond ST single or two component?
Can I use it to stick any waterproofing membrane?
What surface preparation does it need?
How much do I need, and what are the pack details?
How we position STP ShaliBond ST
ShaliBond ST only makes sense as part of a complete STP SuperTene assembly, so specify it alongside the SuperTene SBS-modified self-adhesive membrane and ShaliTex primer that complete the cold-applied roof from the same brand family. Where a project instead wants a torch-bonded route, STP’s APP-modified membranes with ShaliBond APP adhesive are the hot-applied counterpart from the same house. For teams who would rather avoid a sheet membrane altogether, Space Arc also supplies liquid-applied cementitious waterproofing such as Fosroc Brushbond RFX, which delivers a monolithic waterproof skin on the same roof-slab and terrace applications. Our engineers can help you weigh a fully-bonded membrane system against a brush-applied coating for the specific deck, exposure and programme in question.
Fosroc Brushbond RFX — Choose Brushbond RFX when the specifier wants a seamless liquid-applied cementitious waterproof coating on the slab rather than a bonded sheet-membrane system like SuperTene + ShaliBond ST.
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