STP ShaliSeal BT SB
A ready-to-use, cold-applied rubberised bitumen sealant that seals road, bridge and construction joints against water without any heating kettle on site.
What is it?
A single-component, cold-applied rubberised solvent-based bituminous sealing compound from STP Limited, supplied black and ready to use straight from the container.
Where is it used?
Movement and construction joints in flexible (asphalt) roads and bridges, garage and filling-station floors, warehouse slabs and secondary containment structures.
Why use it?
It stays flexible through daily thermal cycling, bonds well to concrete and prevents water ingress, without the fire risk and labour of a hot-pour bitumen operation.
How is it applied?
Prepare a clean, dry, dust-free joint, prime where needed, then pour or trowel the sealant cold into the gap and let the solvent flash off to skin over.
About STP ShaliSeal BT SB
ShaliSeal BT SB is STP Limited’s cold-applied answer to a problem every road and bridge contractor knows well: joints and cracks that open and close with the seasons, let water in, and quietly destroy the pavement beneath. It is a one-component, rubber-modified bituminous compound carried in a solvent, which means it arrives on site as a workable black mastic that needs no mixing, no ratios and no heating kettle. The crew opens the container, cleans the joint and applies the material directly. As the solvent flashes off, the rubberised bitumen sets to a tough, flexible seal that moves with the substrate instead of cracking away from it.
That cold-applied nature is the whole point of the product. Traditional bitumen joint filling relies on melting blocks in a boiler and pouring at high temperature, which brings fire hazard, fumes, dedicated plant and skilled operators to the job. ShaliSeal BT SB removes all of that. It is well suited to live carriageways, bridge decks, airport pavements and industrial floors where bringing hot equipment is impractical or unsafe, and where the work window is short. Because it is anti-corrosive, resistant to sunlight, rain and repeated temperature swings, and holds firm against water penetration and root growth, it is a practical choice for joints that have to survive years of traffic and weather with little maintenance.
The technical insight
The performance comes from modifying straight bitumen with rubber. Plain bitumen is cheap and waterproof but brittle when cold and prone to flow when hot, so it cracks in winter and slumps out of vertical or wide joints in summer. Blending elastomeric rubber into the bitumen matrix widens that usable temperature band: the rubber gives the film elastic recovery so it can stretch as a joint opens and pull back as it closes, while lowering the material’s tendency to flow in hot weather. Carrying that rubber-bitumen system in a solvent rather than heating it is what makes cold application possible. On the joint, the solvent evaporates and the film consolidates from the surface down, developing adhesion to the concrete or asphalt faces as it cures. The result is a seal that behaves less like a rigid filler and more like a flexible gasket keyed into the joint, which is exactly what a moving, water-exposed joint needs.
Where it is used
- Expansion and construction joints in flexible (asphalt) road pavements
- Deck and construction joints on bridges and flyovers
- Sealing joints and cracks on airport and taxiway pavements
- Joints in garage, workshop and filling-station floors
- Construction joints in warehouse and industrial concrete slabs
- Secondary containment: joints in walls and floors of bunds and artificial ponds
- Routed-and-sealed treatment of surface cracks in road and deck surfaces
Key advantages
- Cold-applied and ready to use, so no heating kettle, boiler or hot-work permit is needed on site
- Single component with no mixing, ratios or induction time to manage
- Rubber modification gives flexibility to accommodate joint movement without cracking
- Good adhesion to concrete and pavement joint faces
- Low susceptibility to flow in hot weather compared with unmodified bitumen
- Resistant to sunlight, rain and repeated cyclic temperature changes
- Prevents water penetration and resists root growth into the joint
- Fast, low-skill application suited to short work windows on live pavements
Limitations & considerations
- Solvent-based: apply with ventilation, keep away from ignition sources and allow solvent to flash off before trafficking
- Cold-applied bitumen is a workhorse road/industrial sealant, not a high-movement or chemical-resistant sealant for water-retaining or building-facade joints
- Black bituminous finish only, so it is not suited where colour matching or a decorative joint is required
- Adhesion depends on a clean, dry, sound and dust-free joint; damp or contaminated faces will compromise the bond
- Bituminous sealants can soften at sustained high surface temperatures and are not intended for permanent fuel or solvent immersion
- 6-month shelf life, so stock should be rotated and used within date
Selection & best practice
Design the joint or rout the crack to a sound, regular profile before you start. The joint faces must be clean, dry, sound and free of dust, laitance, oil and loose material; wire-brush or grind as needed and blow out debris. Use a bond breaker or backing rod at the base of deep joints so the sealant bonds only to the two faces and can flex freely, and prime the faces where the substrate or site conditions call for it. Apply ShaliSeal BT SB cold, pouring or trowelling it firmly into the joint to fill without voids, and tool the surface neatly. Allow the solvent to flash off and the film to skin over before opening the joint to traffic, and apply in dry conditions clear of imminent rain. Work with ventilation, keep the material away from open flame and sparks, and reseal the container tightly between uses. Confirm surface preparation, priming and cure times against the current STP technical data sheet for your specific joint.
Specifications
| Product type | Single-component (1K) cold-applied rubberised bituminous joint sealant |
| Base | Rubber-modified, solvent-based bitumen |
| Colour | Black |
| Consistency | Ready-to-use pourable / trowellable compound |
| Application method | Cold-applied, poured or trowelled; no heating required |
| Mixing | None – single component, used direct from container |
| Pack size | 20 kg container |
| Shelf life | 6 months in original sealed container |
| Storage | Store in a cool, dry place away from heat and ignition sources |
Industry use cases
Highways & Roads
Sealing expansion, construction and routed crack joints in asphalt carriageways without closing lanes for hot-work plant.
Bridges & Flyovers
Cold sealing of deck and construction joints where a heating kettle is impractical and the work window between traffic is short.
Airports
Joint sealing on runways, taxiways and aprons where hot-work restrictions and fast turnaround favour a cold-applied compound.
Industrial & Warehousing
Construction joints in warehouse and factory slabs, garage and filling-station floors that need a flexible, waterproof seal.
Water Containment
Joints in walls and floors of bunds, secondary containment and artificial ponds where root and water resistance matter.
Frequently asked questions
Does ShaliSeal BT SB need to be heated before use?
Is any mixing or priming required?
What surfaces and joints is it meant for?
What pack size and shelf life does it come in?
Can I use it for facade joints or water-retaining tanks?
How soon can traffic run over a sealed joint?
Can Space Arc supply the TDS and arrange delivery across India?
How we position STP ShaliSeal BT SB
ShaliSeal BT SB is the cold-applied, no-kettle option in STP’s ShaliSeal joint-sealant family. Where a project needs a heat-applied grade or a polyurethane joint sealant, other ShaliSeal lines such as the ShaliSeal PU (polyurethane) sealants cover those cases, and STP’s ShaliCure curing compounds and bituminous membranes round out the pavement and waterproofing package. When the joint is a high-movement structural or water-retaining joint rather than a road or industrial one, step up to a premium elastomeric sealant – the Fosroc Thioflex 600 (polysulphide) or Fosroc Nitoseal MS600 (MS-polymer) lines we also stock are the right tools there. Space Arc supplies all of these brands together so specifiers can match the sealant to the joint rather than force one product to do every job.
Fosroc Thioflex 600 — Specify the two-part polysulphide Thioflex 600 instead when the joint is a high-movement structural or water-retaining joint that needs elastomeric recovery and chemical resistance rather than a cold bitumen road seal.
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