Fosroc Conplast SP 337 – High-Performance Concrete Admixture

Fosroc Conplast SP 337 is a premium-quality, chloride-free, high-range water-reducing admixture specifically formulated to improve the strength, durability, and workability of concrete. As an SNF-based (Sulphonated Naphthalene Formaldehyde) superplasticizer, it allows for substantial water reduction without compromising consistency or flow.

Conplast SP 337 provides exceptional cement particle dispersion, resulting in concrete with improved density, reduced permeability, and enhanced compressive strength. It is widely used in precast, prestressed, and ready-mix concrete (RMC) production where superior performance and durability are essential.

Key Benefits

Up to 25–30% water reduction, increasing strength and density.

Excellent workability retention with no segregation or bleeding.

Improved early and final strength, ideal for fast-track construction.

Chloride-free, safe for reinforced and prestressed structures.

Enhances surface finish and reduces cracks or shrinkage.

Economical — reduces cement content while maintaining performance.

Applications

High-performance and high-strength concrete

Precast and prestressed concrete units

Ready-mix concrete production

Bridges, dams, foundations, tunnels, and industrial flooring

Pumpable and slipform concrete

Usage Instructions

Dosage: 0.5%–1.5% by weight of cement (adjust through site trials).

Mixing: Add to the mixing water or directly into the wet concrete. Ensure adequate mixing (1–2 minutes) for uniform dispersion.

Compatibility: Suitable with all types of Portland cement, fly ash, silica fume, and GGBS.

Technical Data

Water Reduction: 25–30%

Setting Time: Normal to slightly extended

Workability Retention: 30–60 minutes

Compressive Strength: Higher than control mixes

Air Entrainment: Low and controlled

Packaging & Storage

Available in 20L, 200L, and bulk containers. Store in a cool, dry place away from sunlight and frost. Shelf life: 12 months in sealed containers.

Safety & Handling

Avoid contact with skin and eyes. Use gloves and follow standard construction chemical safety guidelines. In case of contact, rinse thoroughly with water.

Conclusion

Fosroc Conplast SP 337 stands out as a reliable and efficient superplasticizer admixture for all types of modern construction. Its advanced formula improves workability, strength, and long-term durability — ensuring superior performance in demanding structural and infrastructure applications.