Redispersible Powder Rdp Powder for Dry Mortar

Redispersible powder (RDP), also known as redispersible latex powder (RLP), is a dry, free-flowing powder that is used as an additive in dry-mix mortar. It is typically made from a synthetic polymer, such as vinyl acetate-ethylene (VAE), which is spray-dried to form a fine powder.

When RDP is mixed with water, it readily redisperses to form a latex emulsion, which acts as a binder in the mortar. This improves the mortar’s:

  • Workability: Makes the mortar easier to mix and apply.
  • Adhesion: Improves the mortar’s bond to substrates such as concrete, brick, and tile.
  • Flexibility: Reduces the risk of cracking.
  • Water resistance: Improves the mortar’s resistance to water penetration.
  • Freeze-thaw stability: Improves the mortar’s ability to withstand freeze-thaw cycles.

RDP is commonly used in a variety of dry-mix mortar applications, including:

  • Tile adhesives
  • Self-leveling underlayments
  • Grouts
  • Wall plasters
  • Renderings
  • Exterior insulation finishing systems (EIFS)
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