Redispersible Polymer Powder (RDP)

(1) Self-Leveling Compounds

RDP powder improves flow behavior, substrate adhesion, and crack resistance in self-leveling mortars. It helps achieve excellent surface flatness, uniform strength development, and long-term durability of flooring systems, especially in high-performance or thin-layer applications.

(2) Tile Adhesives and Tile Grouts

Redispersible latex powder significantly improves bonding strength to ceramic tiles, porcelain tiles, stone, and various substrates. It enhances water resistance and crack resistance, ensuring reliable performance for large-format tiles, low-absorption tiles, and installations on complex or demanding substrates.

(3) External Thermal Insulation Composite Systems (EIFS / ETICS)

The RDP chemical is a key modification component in bonding mortars and reinforcing (base coat) mortars. It provides strong adhesion to insulation boards, improved flexibility, and crack resistance, helping to maintain the long-term structural stability, durability, and weather resistance of the entire insulation system.

(4) Wall Putty and Plastering Mortars

In putties and plastering mortars, redispersible powder enhances adhesion to substrates, increases flexibility, and improves sanding and workability. It effectively reduces defects such as hollowing, delamination, and cracking, resulting in smoother surfaces and better finishing quality.

(5) Waterproof Membranes and Coatings

When used in cement-based waterproof membranes and coatings, RDP redispersible latex powder enhances water resistance, adhesion, and impermeability. It is widely applied in roofs, bathrooms, balconies, and basement waterproofing systems, providing reliable protection against moisture penetration.

(6) Gypsum-Based Materials

In gypsum-based formulations, RDP redispersible powder improves adhesion, flexibility, and water resistance while extending open time and workability. It enhances overall toughness and application performance, making it suitable for high-quality interior finishing and repair materials.

The recommended dosage of redispersible polymer powder (RDP) typically ranges from 1.0% to 5.0% by weight of the dry mortar, depending on the application requirements, desired performance, and relevant construction standards. Higher dosages are recommended for mortars that demand enhanced flexibility, superior adhesion, and increased crack resistance, while standard applications can achieve effective results with lower dosages.

RDP powder is fully compatible with a wide range of common mortar additives, including cellulose ethers (HPMC, HEMC, HEC), fibers, mineral fillers, and other functional components. This excellent compatibility ensures stable formulation behavior, consistent workability, and reliable performance across various dry-mix systems.

Optimizing the formulation is essential to achieve the ideal balance between adhesion, flexibility, mechanical strength, workability, durability, and cost efficiency. It is recommended to adjust the dosage and conduct practical testing to meet specific project requirements and comply with applicable standards, ensuring long-term performance and reliability of the final mortar system.

1. Redispersion in Water. When mixed with water, redispersible polymer powder rapidly and uniformly redistributes within the system, forming stable polymer latex particles throughout the mortar matrix.

2. Film Formation and Bonding Effect. As cement hydration progresses and moisture gradually evaporates, the polymer particles coalesce to form a continuous and flexible polymer film. This film:

• Creates strong bonding bridges between cement hydration products.
• Significantly enhances adhesion between the mortar and the substrate.
• Improves internal cohesion, flexibility, and overall mechanical integrity of the hardened system.

3. Microstructure Optimization. The polymer film effectively modifies the internal pore structure of the mortar, reducing brittleness and enhancing resistance to cracking and mechanical stress, thereby improving long-term durability.