Product Overview

Fosroc Conplast SP430 is a sulphonated naphthalene formaldehyde condensate (SNFC)-based superplasticizer for concrete. It acts as a highly effective dispersant for cement particles, allowing significant water reduction (up to 25%) while maintaining or improving concrete workability and slump. The result is concrete that is simultaneously stronger (due to lower w/c ratio), more durable, and easier to place — without the bleeding, segregation, or air entrainment issues associated with over-watered mixes. Conplast SP430 is widely used in ready-mix concrete plants, precast factories, and on-site for high-strength and high-performance concrete production.

Typical Applications

• Ready-mix concrete (RMC) production for high-slump requirements
• Precast concrete — columns, beams, slabs, piles
• High-strength concrete (M40 and above)
• Self-compacting concrete (used with Auracast series)
• Mass concrete pours where low heat generation is needed
• Slip form construction requiring sustained workability
• Pumped concrete for high-rise buildings
• Congested reinforcement sections requiring high workability

Key Advantages

• Chloride-Free: Contains zero chlorides — safe for use in reinforced concrete, prestressed concrete, and all structures with embedded steel without risk of corrosion acceleration
• Up to 25% Water Reduction: Significant water reduction translates directly to higher compressive and flexural strength — enabling target strengths to be met with lower cement contents in many cases
• Improved Pumpability: Produces smooth, cohesive, workable mixes that pump easily over long distances and heights — reducing pump pressure and blockage risk
• No Segregation or Bleeding: Unlike plain water addition, SP430 improves workability without causing the segregation and surface bleeding that weakens the top surface of concrete slabs
• Works with All Cements: Compatible with OPC, PPC, SRPC, fly ash blends, and GGBS blends — versatile across all concrete mix designs and project types