STP ShaliFix SC M
A single-component, Portland-cement road-patching mortar that fills potholes and pavement spalls, gains strength fast, and lets you reopen the lane the same day.
What is it?
A ready-to-use, single-component cementitious repair mortar based on Portland cement, formulated specifically for patching trafficked concrete surfaces.
Where is it used?
Concrete roads, highway sections, potholes, industrial yards, logistics-park hardstandings, bridge decks, and airfield aprons and taxiways.
Why use it?
It sets and gains strength quickly, so a repaired patch can carry traffic in hours rather than days, cutting closure time on live pavements.
How is it applied?
Mixed with clean water on site, then placed into a prepared, saw-cut recess and compacted by trowel or hand to a minimum depth of about 10 mm.
About STP ShaliFix SC M
STP ShaliFix SC M sits in STP Limited’s Restofix repair range as the workhorse for concrete pavement patching. It is a single-component, Portland-cement-based mortar supplied as a pre-blended dry powder; the crew adds only clean water on site to produce a placeable repair material. That simplicity matters on a road job, where measuring resins or dosing accelerators under traffic pressure is exactly where mistakes creep in. Here the mix is one bag, one water ratio, and the material behaves consistently from batch to batch across a shift.
What distinguishes SC M from a general-purpose sand-cement patch is speed and compatibility. It is engineered to develop useful strength quickly so a lane can be handed back to traffic in hours, and it is designed to bond with and behave like the host concrete rather than sitting as a stiff, mismatched plug that spalls at the edges. For Delhi-NCR contractors managing arterial roads, toll plazas, or warehouse aprons where every hour of closure carries a cost, that combination of a durable, fully compatible repair and a same-day reopening is the whole point of specifying it over slower conventional mortars.
The technical insight
The performance comes from a cement chemistry tuned for rapid early hydration. Ordinary Portland-cement mortars are strong but slow; they need days before they can safely carry wheel loads. ShaliFix SC M uses a controlled binder system so that the cement paste builds its strength-bearing calcium-silicate-hydrate network far sooner, which is why a patch can reach a compressive strength above 40 MPa and open to traffic in hours rather than the usual multi-day wait. Because it is a true cementitious system compatible with the host slab, its thermal movement, stiffness, and durability track the surrounding concrete, so the repair does not become a hard, brittle island that debonds under repeated impact. The trade-off is that fast-hydrating cement systems are sensitive to water content and ambient temperature: too much water dilutes the paste and slows strength, while heat accelerates set. That is why site control of the water ratio and an eye on the return-to-traffic time quoted for the day’s temperature both matter.
Where it is used
- Emergency pothole repair on concrete roads, highways and arterial corridors
- Full-depth and partial-depth patching of rigid concrete pavement (PQC) defects
- Airfield apron, taxiway and runway shoulder concrete repairs where downtime is critical
- Industrial yard, warehouse and logistics-park hardstanding patching
- Bridge-deck and approach-slab concrete patch repair
- Toll plaza and weighbridge approach slab reinstatement
- Loading-bay and ramp repairs in distribution and manufacturing facilities
- Rapid reinstatement of saw-cut trench crossings in concrete carriageways
Key advantages
- Single-component: add only clean water on site, no separate resin or liquid to dose
- Fast strength gain allows the repair to reopen to traffic in hours, not days
- High compressive strength (above 40 MPa) suited to wheel and axle loading
- Fully compatible with the host concrete, so the patch behaves like the parent slab
- Placed and compacted by simple trowel or hand methods, no specialist plant
- Consistent, factory-blended powder gives repeatable results across batches
- Reduces lane-closure duration and the traffic-management cost that goes with it
- Backed by STP Limited’s established Restofix repair range and Pan-India supply
Limitations & considerations
- Rapid-setting chemistry means limited working time; only mix what can be placed and compacted quickly
- Water ratio must be controlled on site, over-watering weakens the repair and slows strength gain
- Return-to-traffic time varies with ambient temperature and must be read from the day’s conditions, not assumed
- Requires a sound, clean, saw-cut recess with a minimum depth (typically around 10 mm); feather-edging is not appropriate
- As a cementitious system it needs adequate substrate saturation and curing discipline in hot or windy weather
- For very shallow surface spalls or structural micro-concrete repairs, other products in the ShaliFix range are better suited
Selection & best practice
Start by saw-cutting the repair perimeter and breaking out to sound concrete, removing all loose, weak or contaminated material, then clean and pre-saturate the substrate to a saturated-surface-dry condition so the host concrete does not rob water from the fresh mortar. Gauge the powder with clean water strictly at the quantity the TDS specifies, mixing only as much as the crew can place and compact before it stiffens. Work the mortar firmly into the recess to fully fill and compact it, respecting the minimum repair depth of about 10 mm; do not attempt thin feather edges. Finish to the surrounding pavement level and texture, then cure appropriately, protecting the patch from rapid drying in sun or wind. Because setting and strength gain are temperature-dependent, confirm the correct return-to-traffic time for the site conditions from the current TDS before reopening the lane rather than relying on a fixed figure.
Specifications
| Product type | Single-component, Portland-cement-based repair mortar (ready to use) |
| Brand / range | STP Limited — ShaliFix (Restofix repair range) |
| Primary use | Fast-setting patching of trafficked concrete roads and pavements |
| Mixing | Add clean water on site (dosage per manufacturer TDS) |
| Compressive strength | Greater than 40 MPa (rapid early strength) |
| Minimum repair depth | Approximately 10 mm |
| Placement method | Trowel or hand compaction into a prepared recess |
| Return to traffic | Within hours; exact time varies with temperature — refer to TDS |
Industry use cases
Highways & Roads
Patching potholes and PQC defects on concrete carriageways where the lane must reopen to traffic within the same shift.
Aviation & Airfields
Repairing apron, taxiway and shoulder concrete between operational windows, where fast strength gain limits ground-movement disruption.
Warehousing & Logistics
Reinstating damaged yard slabs, loading bays and ramps in distribution centres without shutting down material movement for days.
Bridges & Infrastructure
Localised patch repair of bridge decks and approach slabs where a durable, host-compatible repair is needed under live loading.
Manufacturing & Industrial
Fixing spalled or potholed concrete in plant yards and access roads while keeping forklift and truck traffic running.
Frequently asked questions
How soon can I reopen the road after using ShaliFix SC M?
Do I need to add anything other than water?
What compressive strength does it reach?
What is the minimum depth I can repair with it?
Is it suitable for airport aprons and industrial yards, not just roads?
How is it different from ShaliFix SC 40 or ShaliFix MC?
How we position STP ShaliFix SC M
ShaliFix SC M is the fast road-patching choice within STP’s ShaliFix repair family. For shallow surface spalls and floor correction, look at ShaliFix SC 40 or the two-component ShaliFix SC 2K; for deeper, more structural reinstatement where a pourable non-shrink micro-concrete is called for, move to ShaliFix MC or ShaliFix MC 65. As an authorised distributor across Delhi-NCR and Pan-India, Space Arc also supplies equivalent rapid concrete-repair systems from Fosroc, so if a project specification calls for a BS EN 1504-3 compliant, chloride-free patching mortar we can match SC M to the right alternative brand.
Fosroc Patchroc GP — Specify this when the job needs a chloride-free, BS EN 1504-3 patching mortar with a documented figure such as roughly 20 MPa in about two hours for same-shift trafficking on aprons and industrial slabs.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.