PNS (Poly Naphthalene Sulfonate)
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Although commonly referred to as PNS (Poly Naphthalene Sulfonate), it is also used interchangeably with FDN (Formaldehyde-based Naphthalene Sulfonate Condensate) and SNF (Sodium Naphthalene Formaldehyde).
PNS works by dispersing the cement particles and reducing the friction between them, which can improve the flow and workability of the concrete and can reduce the amount of water required to achieve a mid-range water reduction and a certain level of workability by up to 30%.