Sika Antisol E (WP)
A spray-applied, white-pigmented wax-emulsion curing membrane that seals moisture into freshly placed concrete and cuts plastic shrinkage cracking on large horizontal pours.
What is it?
A ready-to-use, white-pigmented liquid curing compound based on an aqueous wax emulsion, conforming to ASTM C309 Type 2 Class A.
Where is it used?
Large horizontal concrete pours in the open sun: highways, runways, taxiways, roof decks, podium slabs and canal linings.
Why use it?
It forms a moisture-retaining film that holds mix water in the slab for proper hydration, so you reach design strength without ponding, hessian or piped water curing.
How is it applied?
Stir well and spray a uniform coat with a low-pressure sprayer as soon as the surface bleed water has evaporated, at roughly 0.10-0.20 kg/m².
About Sika Antisol E (WP)
Sika Antisol E (WP) is a single-pack, ready-to-use curing compound built around an aqueous wax emulsion carrying a white inorganic pigment. It arrives as a white, lump-free liquid that you spray straight onto green concrete. As the water in the emulsion evaporates, the wax coalesces into a continuous film that seals the surface and stops mix water from escaping while the cement is still hydrating. That retained moisture is exactly what fresh concrete needs in the first days after placement, and it is precisely what the Indian sun, dry wind and high summer temperatures try to steal.
The “WP” stands for white-pigmented, and that pigment does real work rather than just marking coverage. On expressway pavements, airport aprons and exposed roof slabs, a white film reflects solar radiation and keeps the slab surface cooler, which reduces the thermal gradient between a baking top surface and the cooler concrete below. For contractors casting thousands of square metres a day, it replaces the labour, water and logistics of wet-hessian or ponded curing with a one-pass spray operation. It conforms to ASTM C309-89 Type 2 Class A, the recognised specification for white-pigmented liquid membrane-forming curing compounds, so it slots cleanly into most highway and infrastructure curing specs.
The technical insight
Concrete does not “dry” to gain strength; it hydrates, and hydration is a chemical reaction that needs the mix water to stay put. When a fresh slab loses water faster than bleed water rises to the surface, the top skin stiffens and shrinks against the still-plastic concrete underneath, and that restrained shrinkage tears the surface into the map-cracking and crazing you see on badly cured pavements. Sika Antisol E (WP) attacks this at two points. First, the wax film physically caps the evaporation route, so water that would have flashed off in dry wind stays in the matrix and keeps feeding the hydration reaction. Second, the white pigment lifts the surface reflectance, lowering peak surface temperature and the evaporation rate that temperature drives. The net effect is a slab that keeps its water long enough to build the cement paste structure the mix was designed for, with fewer plastic shrinkage cracks, less surface dusting and more reliable near-surface strength and abrasion resistance. Because the film is wax-based, it is a curing aid, not a permanent protective coating, and it is naturally broken down by weathering and traffic over the following weeks.
Where it is used
- Curing of highway, expressway and rigid pavement quality concrete (PQC) slabs
- Airport runways, taxiways and aprons where wet curing logistics are impractical
- Large concrete roof decks and podium slabs exposed to direct sun
- Canal, reservoir and water-channel linings
- Industrial ground-bearing slabs, hardstandings and external paving
- Bridge decks and other extensive horizontal cast-in-situ surfaces
- Precast yard curing of paver blocks, kerbs and slab elements
- Any mass horizontal pour where ponding or hessian curing is slow, costly or water-scarce
Key advantages
- Conforms to ASTM C309-89 Type 2 Class A for white-pigmented curing compounds
- White pigment reflects sunlight and keeps the slab surface cooler in hot weather
- Retains mix water so the concrete reaches its intended design strength
- Sharply reduces plastic shrinkage cracking, crazing and surface dusting
- Ready to use single pack, no dilution or on-site mixing needed
- Fast, low-labour spray application over very large areas
- Removes the cost, water demand and logistics of hessian or ponded curing
- Economical consumption of only 0.10-0.20 kg/m² per coat
Limitations & considerations
- Wax-based film is not compatible under later bonded coatings, screeds, renders, tile beds or membranes without removal
- Intended for horizontal and near-horizontal surfaces sprayed after bleed water has gone, not for formed vertical faces
- It is a curing aid, not a permanent sealer or protective coating; the film wears away over time
- Consumption varies with wind, humidity and temperature, so site trials are needed to confirm the real rate
- Uneven or under-applied spray leaves gaps in the film and weakens curing efficiency locally
- Where the surface will later be painted or overlaid, a dissipating resin-based compound or wet curing is the better choice
Selection & best practice
Stir the container thoroughly before use so the wax and pigment are evenly dispersed. Time the application to the moment surface bleed water has just evaporated but the concrete is still green; spraying into standing bleed water dilutes the film, and spraying too late lets early moisture loss already occur. Use a clean low-pressure sprayer and lay down a single, uniform, unbroken coat, keeping the nozzle at a consistent height and overlapping passes so the white film shows continuous coverage with no bare streaks. Because real-world consumption shifts with wind, humidity and temperature, run a site trial on your actual mix and conditions to lock in the kg/m² figure before committing the full pour. Do not use it where a bonded finish will follow, and if a later coating is unavoidable, plan for mechanical removal of the wax film or specify a compatible curing method instead. Protect the fresh film from rain and traffic until it has fully formed.
Specifications
| Product type | White-pigmented liquid curing compound |
| Chemical base | Aqueous wax emulsion with inorganic pigment |
| Appearance / colour | White, lump-free liquid |
| Density | 0.99 – 1.02 kg/l at 25°C |
| Consumption | 0.10 – 0.20 kg/m² per coat (varies with wind, humidity, temperature) |
| Standard | ASTM C309-89 Type 2 Class A |
| Application method | Spray with low-pressure sprayer after surface water evaporates |
| Packaging | 20 kg, 100 kg and 230 kg containers |
Industry use cases
Highways & Expressways
Sprayed onto pavement quality concrete immediately behind the paving train so long PQC stretches cure uniformly without water tankers or hessian along the alignment.
Airports
Cures runway, taxiway and apron slabs where large areas and tight windows make wet curing impractical, while the white film keeps surfaces cooler in the sun.
Commercial & Podium Construction
Locks moisture into exposed roof decks and podium slabs cast in the open, reducing crazing before waterproofing or landscaping layers go down (after film removal).
Water Infrastructure
Cures canal, reservoir and channel linings efficiently across broad sloped and flat surfaces where continuous ponding cannot be maintained.
Industrial Flooring
Curing of ground-bearing slabs, hardstandings and external paving to cut dusting and shrinkage cracking on high-traffic wearing surfaces.
Frequently asked questions
Is Sika Antisol E (WP) an admixture that goes into the concrete mix?
How much material do I need per square metre?
Can I apply a screed, tile bed or coating over concrete cured with it?
Why is it white, and does the colour matter?
When exactly should it be sprayed onto the slab?
What standard does it meet and what pack sizes are available?
How we position Sika Antisol E (WP)
Sika Antisol E (WP) is the right pick when you want a white-pigmented, sun-reflecting curing membrane for exposed horizontal pours and no bonded finish will follow. If the same slab must later take a screed, coating or waterproofing, choose a dissipating resin-based curing compound instead so the film breaks down and does not need grinding off. Within the Sika family, pair it with Sika admixtures used in the mix itself, such as a Sika ViscoCrete superplasticiser for workability and water reduction, and consider Sika curing and evaporation-control products for slabs needing different finishes. Space Arc also supplies equivalent wax-emulsion curing compounds from other brands, including Fosroc Concure WB and Dr. Fixit curing solutions, so the specification can be matched to what your consultant or client has approved. For downstream waterproofing on the same structure, we can pair the curing scope with Sika membranes and coatings.
Fosroc Concure WB — A specifier standardised on Fosroc for a project would choose Concure WB, a near-identical water-based wax-emulsion curing compound, to keep the approved-vendor and QA paperwork consistent.
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