Sika Antisol A-1
Spray-applied, aluminised resin curing compound that seals mixing water into fresh concrete and reflects solar heat — built for PQC highways, runways and canal linings where conventional water curing is impractical.
What is it?
A ready-to-use, aluminised synthetic-resin liquid sprayed onto fresh concrete, where it dries to a reflective membrane that stops mixing water from evaporating.
Where is it used?
Pavement-quality concrete on highways, airport runways and aprons, canal linings, industrial hard standings, retaining walls and large exposed slabs.
Why use it?
One spray pass replaces days of ponding, hessian and tanker water while cutting plastic shrinkage cracking and surface dusting on hot, windy pours.
How is it applied?
Sprayed at 0.10–0.20 kg/m² with a hand lance or powered equipment as soon as the bleed-water sheen disappears; keep rain off the film for 2–3 hours.
About Sika Antisol A-1
Sika Antisol A-1 is a membrane-forming curing compound from Sika India, supplied ready to use in 200 kg drums. Its base is a synthetic resin carrying fine aluminium pigment, so the sprayed film does two jobs at once: it seals the slab surface against evaporation, and its silvery finish bounces back a share of the solar radiation that would otherwise heat the young concrete. The product is tested against ASTM C309 and BS 7542, the two references most Indian pavement specifications lean on when they permit liquid curing compounds.
Space Arc Engineering stocks Antisol A-1 for the jobs where it earns its keep — long PQC pours behind a slipform paver, canal beds far from a water source, aprons that cannot be ponded. On such sites conventional curing becomes a logistics problem: tankers, hessian, a curing gang, and a supervisor hoping nobody misses a panel over the weekend. A drum, a sprayer and one trained operator close that gap. As authorised Sika distributors and applicators, we supply from Delhi NCR stock and support dosage trials Pan-India.
The technical insight
Concrete does not dry to gain strength — it hydrates, and hydration needs the mixing water to stay in place for the first several days. On an exposed pavement in an Indian summer, wind and high surface temperatures can pull moisture out of the top few millimetres faster than bleed water replaces it. The result is a starved surface zone: dusting, crazing, plastic shrinkage cracks and poor abrasion resistance, even when the core concrete is sound. Antisol A-1 interrupts that loss path physically. The resin film acts as a moisture barrier that holds water where the cement can use it, while the aluminium pigment reflects incoming solar radiation, lowering surface temperature and the evaporation gradient itself. It protects hydration; it adds nothing to the mix.
Where it is used
- Pavement-quality concrete (PQC) on national highways and expressways
- Airport runways, taxiways and aprons
- Canal linings and irrigation structures remote from curing water
- Industrial hard standings, container yards and parking areas
- Retaining walls and abutments where hessian wrapping is impractical
- Roof decks and terrace slabs, with film removal before finishes
- Large ground-bearing slabs where ponding cannot be maintained
Key advantages
- Retains mixing water so cement hydration can reach design strength
- Reflective aluminised film lowers surface temperature under direct sun
- Reduces plastic shrinkage cracking on windy, exposed pours
- Cuts surface dusting and helps frost resistance of the cured slab
- Single spray pass replaces ponding, hessian and water-tanker cycles
- Ready to use straight from the drum — no dilution or mixing on site
- Tested against ASTM C309 and BS 7542, easing specification approval
Limitations & considerations
- It is a curing aid, not an admixture — it adds no strength and cannot rescue a poor mix or bad finishing
- The film is a bond breaker: it must be removed before any screed, plaster, coating, waterproofing or adhesive is applied
- The application window is tight — spraying too early lets the compound ride on bleed water; too late and the surface has already begun drying
- The silver-grey residue is unsuitable for fair-faced or architectural concrete where appearance matters
- Fresh film needs 2–3 hours of rain protection, and the 6-month shelf life demands disciplined stock rotation
Selection & best practice
Fix the dosage with a site trial first — the 0.10–0.20 kg/m² band is wide because wind, humidity and ambient temperature change how much film a given surface needs. Spray only after the bleed-water sheen has gone but while the surface is still damp and matte; behind a slipform paver this usually means the spray cart follows texturing closely. Hold the lance at a consistent height and pressure, work in overlapping passes, and check the finished film against the light — any holiday or thin patch is an uncured strip that will show up later as a dusty band. Protect the film from rain for 2–3 hours after spraying. Where screeds, coatings or waterproofing follow, build mechanical removal of the residue into the programme rather than discovering the bond breaker at handover.
Specifications
| Chemical base | Aluminised synthetic resin |
| Appearance | Aluminised (silver) thin liquid |
| Density | 0.90–0.94 kg/l at 30°C |
| Consumption | 0.10–0.20 kg/m², finalised by site trial |
| Standards | Tested to ASTM C309 and BS 7542 |
| Application | Hand-operated spray gun; power-driven equipment for large areas |
| Rain protection | 2–3 hours after application |
| Packaging | 200 kg drum |
| Shelf life / storage | 6 months in sealed packaging; +10°C to +40°C, dry, away from sunlight and frost |
Industry use cases
Highways & Expressways
Slipform PQC paving trains cover long stretches daily; a powered sprayer behind the texture cart keeps curing matched to paving speed without tanker convoys.
Airports
Runway, taxiway and apron slabs cure under full sun where ponding is impossible; the reflective film manages both moisture loss and surface temperature.
Irrigation & Canals
Canal linings are typically poured far from reliable curing water — the clearest case where spraying a membrane beats hauling water on cost alone.
Industrial Yards
Container yards and hard standings need dust-free, abrasion-resistant surfaces, and proper curing of the top few millimetres is what delivers them.
Structures
Retaining walls and abutments where fixing and re-wetting hessian at height is slow, unsafe, or simply never happens consistently.
Frequently asked questions
How much area does a 200 kg drum cover?
When exactly should it be sprayed?
Can we paint, screed or waterproof over a slab cured with Antisol A-1?
Is Antisol A-1 acceptable on NHAI and MoRTH projects?
Why choose an aluminised compound over a white or clear one?
Does it improve concrete strength or replace an admixture?
How we position Sika Antisol A-1
Antisol A-1 is the aluminised workhorse of Sika’s curing range. Within the same family, Sika Antisol A-4 serves projects specifying a heavier-bodied aluminised film, while Sika Antisol E (WP) covers tenders that call for a wax-based, white-pigmented emulsion. For the pour itself we routinely pair it with Sika’s PQC admixtures — Sikament and Sika ViscoCrete water reducers — so curing and workability come from one accountable supply chain. Where a specification names a wax-based white compound from another stable, Fosroc Concure WB from our Fosroc range is the usual substitution: functionally interchangeable, chosen on spec wording and approval history rather than any real performance gap.
Fosroc Concure WB — Specifiers whose tender documents name a wax-based, white-pigmented ASTM C309 curing compound — common wording on NHAI and MoRTH pavement jobs — would pick Concure WB over an aluminised resin grade.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.