RDP, or Redispersible Polymer Powder, is a dry powder form of polymer that, when mixed with water, redistributes into a stable emulsion. It is widely used in the construction industry as an additive to improve adhesion, flexibility, and water retention in cement-based products. RDP enhances the durability and workability of materials such as tile adhesives, mortars, renders, and waterproofing coatings. It reduces cracking, shrinkage, and brittleness, while increasing bonding strength and resistance to freeze-thaw cycles. Available in various grades, RDP is a versatile modifier for high-performance construction applications.
| Parameter | Specification |
|---|---|
| Product Name | Redispersible Polymer Powder (RDP) |
| Appearance | White to off-white powder |
| Solubility | Redispersible in water |
| pH Value (5% solution) | 6.0 – 8.5 |
| Bulk Density | 0.35 – 0.50 g/cm³ |
| Glass Transition Temperature (Tg) | 30 – 50 °C (grade dependent) |
| Polymer Type | VAE / EVA / SBR (grade dependent) |
| Viscosity of Redispersed Latex | 100 – 300 mPa·s |
| Water Retention | High |
| Adhesion | Excellent on cement, masonry |
| Recommended Applications | Tile adhesives, mortars, renders, waterproof coatings, flooring screeds |
| Shelf Life | 12 months (stored cool and dry) |
