STP ShaliPatch EC 10
Three-component, cold-applied elastomeric concrete that fills 5-50 mm cracks and spalls on runways, PQC roads and bridge decks — and takes traffic back in roughly two hours.
What is it?
A three-component (resin, hardener, graded aggregate), cold-applied, 100% solids elastomeric concrete from STP Ltd, made for flexible repair of pavement cracks and spalls.
Where is it used?
Airport runways, aprons and taxiways, PQC highways, bridge and parking decks, and industrial floors — on both concrete and bituminous pavements.
Why use it?
It reopens to traffic in about 1.5-2 hours, carries heavy wheel loads, and stays flexible, so the repair moves with the pavement instead of cracking out again.
How is it applied?
Saw-cut the defect to sound concrete, clean with dry air, prime concrete with ShaliPrime S or 2E SF, mix components A+C then B, pour into the void and trowel-finish.
About STP ShaliPatch EC 10
Cracks between 5 and 50 mm wide are the awkward middle ground of pavement maintenance: too wide for a sealant, too narrow and too mobile for a rigid repair mortar that will simply reflect the crack within a season. ShaliPatch EC 10 from STP Ltd is built for exactly this band. It is a three-component elastomeric concrete — a pre-weighed resin, hardener and graded aggregate — mixed cold on site into a black or grey, self-levelling material that pours into the defect, bonds to concrete or bituminous substrates, and cures into a tough but flexible patch. Because it is 100% solids, it fills the void completely and shuts off the percolation of water and chemicals that would otherwise keep eating at the pavement from inside.
Space Arc Engineering supplies ShaliPatch EC 10 across Delhi NCR and Pan-India as an authorised distributor and applicator. We see it specified most often where downtime is the real cost: airfield pavements that must reopen between flight windows, PQC carriageways under short lane closures, and factory yards that cannot park their forklift fleet for a week. Alongside supply, our teams support method statements, primer selection and trained application crews — which matters with this product, because its speed is both its advantage and its discipline.
The technical insight
The material works by pairing a polymerised elastomeric binder with a dense graded aggregate. On mixing, the low-viscosity resin wets both the aggregate and the prepared substrate, then the hardener drives a rapid cold cure — no hot kettles, no flame. Strength builds quickly: about 3 MPa compressive at 4 hours and 8 MPa at 1 day (ASTM D 695), which is why pavements reopen the same shift. The cured matrix is the interesting part: Shore D hardness of 52 ± 3 gives it the surface toughness to take aircraft and truck wheels, yet it still elongates 45 ± 5% (ASTM D 412). That combination lets the patch flex with thermal movement and deflection instead of debonding, and in low-temperature impact testing at -15°C it shows no cracking. Full 100% solids chemistry means no solvent loss, so there is no cure shrinkage pulling the patch away from the crack walls — and the binder shrugs off fuels, crude oil, acids, alkalis and saltwater, which is exactly what apron and refinery pavements throw at it.
Where it is used
- Filling cracks 5-50 mm wide in concrete and flexible (bituminous) pavements
- Surface correction and spall repair on PQC roads and pavements
- Patching of airport runways, aprons and taxiways
- Reinstatement around airfield lighting retrofits on runways
- Bridge and flyover deck surface repairs
- Parking deck and ramp patching
- Industrial floors and heavy-vehicle yards
- Repairs compatible with coal-tar and asphalt-emulsion sealed surfaces
Key advantages
- Open to traffic in about 1.5-2 hours at moderate temperatures
- Elastomeric cure accommodates pavement movement and resists re-cracking
- High load-bearing capacity with outstanding anti-spalling behaviour
- 100% solids and self-levelling — fills the void fully with no solvent shrinkage
- Excellent resistance to fuels, crude oil, acids, alkalis, oils and saltwater
- Bonds to both concrete and bituminous pavements
- Cold-applied — no hot works permit or heating kettles on site
- Pre-weighed three-component packs give controlled, repeatable mix quality
Limitations & considerations
- Pot life is only 6 ± 1 minutes at 30°C — mixing must be batch-wise at the point of use with a practised crew
- Not a movement-joint material; expansion joints need a purpose-made elastic sealant instead
- Substrate must be structurally sound and dry — no application over standing water, moisture, or pavement below 5°C
- Concrete surfaces need priming (ShaliPrime S / ShaliPrime 2E SF), and new concrete must be at least 28 days old
- Ambient working window at application is 5-35°C, which rules out peak-summer afternoon pours in much of India
- 12-month shelf life; the product must be stored at 10-35°C and never allowed to freeze
Selection & best practice
Preparation decides the outcome. Saw-cut the repair area to a clean geometric shape, removing everything back to sound concrete, and blow the void clear of loose gravel, dust, oil and grease with dry air; grind mechanically only where sand blasting is not possible. On concrete, prime with ShaliPrime S or ShaliPrime 2E SF and let it surface-dry for 30 minutes to 4 hours depending on weather. Then respect the mixing sequence: stir Component A until uniform, blend the full pack of A (resin) with the full pack of C (aggregate) using a slow-speed drill with a spiral blade, add Component B (hardener) slowly, and mix for 2-3 minutes. Never split packs — the 3.6 : 0.9 : 5.5 ratio by weight is factory-set. With roughly six minutes of pot life at 30°C, stage everything at the repair, mix one box at a time, pour immediately and trowel-finish. For estimating, the mixed density of 1.80 kg/L means a 10 kg box yields roughly 5.5 litres of repair volume. Hold traffic for at least two hours, longer in cool weather, and do not install when moisture is present or the pavement is below 5°C.
Specifications
| Composition | 3-component: resin (A), hardener (B), graded aggregate (C); mix ratio 3.6 : 0.9 : 5.5 by weight |
| Mixed density | 1.80 ± 0.05 kg/L |
| Pot life at 30°C | 6 ± 1 minutes |
| Compressive strength (ASTM D 695) | 3 MPa at 4 hours; 8 MPa at 1 day |
| Tensile strength, 7 days (ASTM D 412) | 1.22 MPa |
| Elongation, 7 days (ASTM D 412) | 45 ± 5% |
| Hardness (ASTM D 2240) | Shore D 52 ± 3; no cracking in impact test at -15°C (ASTM D 3029) |
| Application temperature | 5°C to 45°C (ambient 5-35°C at time of application) |
| Packing and shelf life | 10 kg box (2 × 5 kg packs); 12 months in unopened containers |
Industry use cases
Airports
Night-block crack and spall repair on runways and taxiways, fuel-resistant patching on aprons, and reinstatement around runway lighting retrofits — cured and trafficable before the first morning movement.
Highways & Expressways
5-50 mm crack filling and surface correction on PQC carriageways under short lane closures, where a rigid mortar would reflect the crack as the slab continues to move.
Bridges & Flyovers
Deck surface defects and spalls where live-load deflection defeats cementitious patches; the elastomeric matrix flexes with the deck instead of debonding.
Industrial Plants & Logistics Parks
Floor and yard cracks under forklift and trailer traffic, including areas exposed to oils, fuels and process chemicals, with same-shift return to service.
Parking Structures
Ramp and deck patching completed over a weekend or overnight shutdown, tough enough for turning wheel loads on the reopened surface.
Frequently asked questions
How soon can the repaired pavement take traffic?
What crack widths can ShaliPatch EC 10 handle?
Is a primer required?
Can it be used on asphalt as well as concrete?
How do we manage the six-minute pot life on site?
Can I use it in expansion joints?
How we position STP ShaliPatch EC 10
ShaliPatch EC 10 is the flexible, fast-reopening option in STP’s pavement repair family. Pair it with ShaliPrime S or ShaliPrime 2E SF, which the system requires on concrete substrates, and step up to ShaliPatch EC 20 in the same elastomeric concrete range for heavier-duty reinstatements. For the movement joints that EC 10 deliberately does not cover, STP’s ShaliSeal joint sealants are the correct companion. Where a repair area is fully static and a rigid patch is acceptable — floor spalls, ramps, kerb reinstatement — a fast-setting cementitious mortar like Fosroc Patchroc GP is often the more economical choice, and for live structural cracks needing restoration of monolithic strength, epoxy injection systems from our Fosroc line are the better tool. Space Arc supplies and applies all of these Pan-India, so the specification can follow the defect rather than the other way around.
Fosroc Patchroc GP — Where the repair is static and a rigid, rapid-setting cementitious patch is acceptable — floors, ramps, non-moving PQC spalls — specifiers often choose Patchroc GP over an elastomeric system for its economy and early strength.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.