Fosroc Auracast 50
New-generation polycarboxylic ether (PCE) superplasticiser engineered for precast concrete elements that demand high early compressive strength without steam curing.
What is it?
Fosroc Auracast 50 is a new-generation, polycarboxylic ether (PCE) based superplasticiser built on a polymer with long side chains and short main chains. It is supplied as a light yellow to brown liquid and complies with IS:9103:1999 and ASTM C494 Type F.
Where is it used?
Precast concrete manufacturing across Delhi NCR and Pan-India, including hollow core slabs, concrete blocks, cement tiles, kerbstones, edgings and building blocks where high early compressive strength is required without steam curing.
Why use it?
The PCE chemistry delivers strong workability and dispersion at low dosage, helping precast producers achieve high early strength so moulds can be turned around faster, without resorting to energy-intensive steam curing. It is chloride-free, making it suitable for reinforced and prestressed precast units.
How is it applied?
Dosed into the concrete mix at 0.2 to 2.0 litres per 100 kg of cementitious material, with the optimum established by site trial. Space Arc Engineering, an authorised Fosroc distributor and applicator, supports specification, trial mixes and supply.
About Fosroc Auracast 50
Fosroc Auracast 50 is a new-generation superplasticising admixture based on polycarboxylic ether (PCE) polymer technology. Unlike older sulphonated naphthalene formaldehyde (SNF) or naphthalene-based superplasticisers, the Auracast 50 molecule is engineered with long side chains and short main chains. This architecture allows the polymer to disperse cement particles efficiently through steric hindrance rather than purely electrostatic repulsion, releasing trapped water and improving workability at comparatively low dosage.
The product was developed specifically for the precast concrete industry. It is supplied as a light yellow to brown liquid with a specific gravity of 1.04 +/- 0.02. It is chloride-free, tested per BS EN 480-10:1997, which makes it appropriate for reinforced and prestressed precast elements where chloride ingress and corrosion of steel are a concern. Auracast 50 complies with IS:9103:1999 (Superplasticizer) and ASTM C494 Type F.
In Indian precast yards producing hollow core slabs, paver blocks, cement tiles, kerbstones, edgings and building blocks, the key commercial driver is mould turnaround. Auracast 50 is formulated to help producers reach high early compressive strength so that elements can be demoulded and the moulds reused sooner, without the capital and running cost of steam curing. This is particularly valuable for high-volume, factory-controlled production in the Delhi NCR belt and across Pan-India projects.
Space Arc Engineering is an authorised Fosroc distributor and applicator serving Delhi NCR and Pan-India. We supply Fosroc Auracast 50 alongside specification support, trial-mix guidance and on-site technical assistance to help precast manufacturers optimise dosage for their specific cement, aggregates and production cycle.
The technical insight
The performance of Fosroc Auracast 50 stems from its comb-shaped polycarboxylic ether (PCE) polymer. The backbone (short main chain) adsorbs onto cement grains, while the grafted long side chains project outward and create steric (physical) separation between particles. This steric mechanism is more powerful and more durable than the electrostatic-only action of legacy SNF superplasticisers, which is why PCE admixtures achieve high water reduction and flow at lower dosages. For precast producers, this translates into dense, workable concrete that develops strength quickly enough to demould without steam curing. Because the product is chloride-free (per BS EN 480-10:1997), it does not introduce chlorides that could initiate reinforcement corrosion. The recommended dosage range of 0.2 to 2.0 L per 100 kg of cementitious material is deliberately broad; the optimum point should always be fixed by trial against the actual mix design, cement source and target demould time.
Where it is used
- Hollow core slabs requiring high early strength for prestressing and demoulding
- Concrete blocks and building blocks in high-volume precast yards
- Cement tiles and paver production
- Kerbstones and road edgings
- Precast elements where steam curing is to be avoided to cut energy cost
- Reinforced and prestressed precast units needing a chloride-free admixture
Key advantages
- Polycarboxylic ether (PCE) chemistry disperses cement efficiently at low dosage
- Helps achieve high early compressive strength without steam curing
- Faster mould turnaround improves precast yard productivity
- Chloride-free (tested per BS EN 480-10:1997), suitable for reinforced and prestressed elements
- Complies with IS:9103:1999 and ASTM C494 Type F
- Broad, trial-optimisable dosage window of 0.2 to 2.0 L per 100 kg cementitious material
- Backed by Space Arc Engineering as an authorised Fosroc distributor and applicator
Limitations & considerations
- Optimum dosage must be established by site trial; over-dosing can affect set and finish
- Performance is sensitive to cement source, aggregate grading and ambient conditions
- Best results are obtained in factory-controlled precast environments rather than uncontrolled field batching
- As a liquid admixture, it requires accurate dispensing and proper storage
- Not a substitute for sound mix design, curing discipline or quality control
Selection & best practice
Always fix the dosage by trial mix within the recommended 0.2 to 2.0 L per 100 kg of cementitious material window, using your actual cement, aggregates and target demould time rather than assuming a fixed figure. Add Auracast 50 with the mixing water or as a delayed addition per Fosroc guidance to maximise dispersion, never directly onto dry cement. Maintain consistent batching controls and accurate liquid dispensing. For reinforced or prestressed precast, the chloride-free profile is an advantage, but it should be paired with good cover and curing practice. Engage Space Arc Engineering early for specification support and trial-mix assistance.
Specifications
| Chemical base/type | Polycarboxylic ether (PCE) based superplasticiser (long side chains, short main chains) |
| Specific gravity | 1.04 +/- 0.02 |
| Appearance/Colour | Light yellow to brown liquid |
| Recommended dosage | 0.2 – 2.0 L per 100 kg of cementitious material (optimum by trial) |
| Chloride content | Nil / tested per BS EN 480-10:1997 (chloride-free) |
| Standards compliance | IS:9103:1999 (Superplasticizer) and ASTM C494 Type F |
| Primary use | Precast concrete elements (hollow core slabs, blocks, cement tiles, kerbstones, edgings, building blocks) requiring high early compressive strength without steam curing |
Industry use cases
Precast Concrete Manufacturing
Used in hollow core slab, block and tile production to reach high early strength and demould faster, eliminating the need for steam curing in Delhi NCR and Pan-India precast yards.
Urban Infrastructure & Roads
Applied in the manufacture of kerbstones, edgings and paver blocks for municipal and highway works, where consistent high-volume output is required.
Building Products
Suitable for cement tiles and building blocks where workability, surface finish and rapid strength gain support high production throughput.
Reinforced & Prestressed Precast
Its chloride-free profile (per BS EN 480-10:1997) makes it appropriate for steel-reinforced and prestressed precast units where corrosion risk must be controlled.
Frequently asked questions
What type of superplasticiser is Fosroc Auracast 50?
What is the recommended dosage of Auracast 50?
Which standards does Auracast 50 comply with?
Is Fosroc Auracast 50 chloride-free?
What does Auracast 50 look like and what is its specific gravity?
What is the main application of Auracast 50?
Can I buy Fosroc Auracast 50 in Delhi NCR?
How we position Fosroc Auracast 50
Fosroc Auracast 50 is positioned as a precast-focused, new-generation PCE superplasticiser whose primary value is achieving high early compressive strength without steam curing. Within the Fosroc admixture range it sits alongside the broader Auramix/Auracast and Conplast families; credible alternative PCE-based superplasticisers in the Indian market include BASF MasterGlenium and Sika ViscoCrete. Lead with Fosroc Auracast 50 for precast yards prioritising fast mould turnaround and a chloride-free, IS:9103:1999 and ASTM C494 Type F compliant product, supplied and supported by Space Arc Engineering as an authorised Fosroc distributor and applicator in Delhi NCR and Pan-India.
Related Concrete Admixtures products
Source Fosroc Auracast 50 for your project
Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.