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​Fosroc Conplast PA21S

Conplast PA21(S) is a dark brown liquid admixture based on sugar-reduced lignosulphonates and surface active agents, supplied by Fosroc for use in concrete.
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Conplast PA21(S): A High-Quality Admixture for Improved Concrete Quality

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Conplast PA21(S) is a high-quality admixture manufactured by Fosroc Chemicals and distributed by their authorized distributor Space Arc Engineering. It is a chloride-free admixture used to entrain a controlled volume of air in a concrete mix, allowing a significant reduction in free water content while increasing workability and cohesion.
Conplast PA21(S) works by acting at the interface of cement aggregate particles and mixing water to be distributed throughout the concrete. The entrained air bubbles are of the optimum diameter and spacing, giving the concrete durability under freeze-thaw or salt attack conditions, while enhancing lubrication during placing, and producing impervious concrete.
One of the significant advantages of Conplast PA21(S) is its ability to improve the quality of concrete. The increased workability and cohesion assist in producing a dense, uniform, close-textured surface, free from segregation, sand runs, and surface water. This, in turn, improves the impermeability of concrete structures, making them less prone to cracking.
The admixture also increases cohesion, as entrained micro-bubbles of air assist in producing cohesive concrete, significantly reducing segregation and bleeding, even when poor aggregate or sand gradings have to be used. This results in a concrete mix with a higher compressive strength and greater resistance to water penetration.
Moreover, Conplast PA21(S) increases durability, as improved workability increases compaction while the controlled air entrainment considerably enhances resistance to attack by frost or salts by reducing the initial surface absorption of the hardened concrete. This makes it a reliable and long-lasting solution for a variety of concrete applications.
In summary, Fosroc Conplast PA21(S) admixture is an exceptional quality product that is supplied and distributed by Space Arc Engineering. It is chloride-free and allows controlled air entrainment in a concrete mix, increasing workability, cohesion, and durability. Its ability to produce dense, uniform, close-textured surfaces with increased impermeability makes it an excellent choice for a range of concrete applications.

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  • Home
  • Services
  • Products
    • Concrete Admixtures >
      • Fosroc Admixtures >
        • Fosroc Auramix 400
        • Fosroc Auramix 500
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        • Fosroc Cebex 112
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        • Fosroc Conplast WL
        • Fosroc Conplast WL Xtra
        • Fosroc Conplast crystalline
        • Fosroc Conplast AEA
        • Fosroc Conplast UW
        • Fosroc Conplast NC
        • Fosroc Conplast P211
        • Fosroc Conplast P505
        • Fosroc Conplast F297
        • Fosroc Conplast SR
        • Fosroc Conplast PA21S
        • Fosroc Conplast R
        • Fosroc Conplast RP264
        • Fosroc Conplast SP430
        • Fosroc Conplast SP430 G8
        • Fosroc Conplast SP430 ES2
        • Fosroc Conplast SP430 SRV
        • Fosroc Conplast SP500KL
        • Fosroc Conplast SP600
        • Fosroc Conplast SP430 KRM6
        • Fosroc Conplast SP430 ITPQ
    • Fosroc Product Summary Guide
    • Brushbond RFX
    • Fosroc Nitobond EP
    • Nitoflor Hardtop
    • Conbextra GP2
    • Fosroc Nitoproof 600 PF
  • Contact
  • Privacy Policy
  • What is an Admixture in Concrete?
  • Everything You Need to Know About Concrete Admixtures
  • Types of Admixtures
    • Water Reducing Admixtures
    • Retarding Admixtures