Redispersible polymer powder (RDP) is a polymer powder that has been spray-dried, mainly composed of vinyl acetate-ethylene copolymer (EVA), vinyl acetate-acrylate copolymer (VAE), styrene-acrylate copolymer (VeoVa), acrylic acid copolymer, etc. It has good redispersibility and can be redispersed into a stable emulsion when added to water, retaining all the properties of liquid emulsion. Due to its excellent adhesion, flexibility, water resistance and processing properties, Redispersible polymer powder is widely used in many construction and industrial fields. The following is a detailed introduction to its main application fields.
1. Dry-mixed mortar field
1.1. Tile Adhesive
Redispersible polymer powder is a key modified material in tile adhesive, which can significantly improve the bonding strength and enhance the adhesion with the substrate and tiles. It is suitable for marble, vitrified tiles, etc. with low water absorption. Latex powder gives tile adhesive good flexibility, anti-slip properties, open time and durability, meeting C1 and C2 grade standards.
1.2. Self-leveling Compounds
In self-leveling mortar, latex powder provides good fluidity and self-healing ability, while improving the adhesion, flexibility and crack resistance of the mortar, ensuring that the floor is flat and crack-free after construction.
1.3. External wall insulation system (EIFS / ETICS)
In external wall insulation systems (such as EPS, XPS board systems), RDP enhances the flexibility, impact resistance and adhesion of the insulation mortar, effectively resists the stress caused by temperature changes, and prevents cracking and falling off.
1.4. Plastering mortar and leveling mortar
When used in plastering mortar or leveling mortar, it can improve the workability, flexibility and crack resistance, make the mortar easier to apply and have a low shrinkage rate, and adapt to complex base construction.
1.5. Waterproof Mortar
Redispersible polymer powder gives waterproof mortar good water resistance and flexibility, suitable for humid environments such as bathrooms, kitchens, basements, etc., effectively preventing moisture penetration and wall cracking.
2. Wall and floor treatment system
2.1. Bonding Agents
Redispersible polymer powder is used in cement-based bonding agents to improve the adhesion between new and old substrates, so that the new construction layer is more firmly bonded to the old concrete, brick wall or gypsum board surface, avoiding hollowing and peeling.
2.2. Putty
Adding RDP to the putty powder for internal and external walls can effectively improve the adhesion, flexibility and construction feel of the putty, while improving its crack resistance and water resistance.
3. Anti-crack, earthquake resistance and flexible treatment
3.1. Crack repair mortar
RDP gives the mortar excellent flexibility, making it more suitable for repairing concrete cracks or other building surface cracks, and can resist slight deformation or stress, improving overall durability.
3.2. Flexible anti-crack putty and thermal insulation anti-crack mortar
Used in areas that require high deformation capacity, such as exterior walls, ceilings, joints, etc., to effectively absorb the deformation of the base layer caused by thermal expansion and contraction, and prevent surface cracking.
4. Decoration and decorative materials
4.1. Colored finishing mortar
The use of RDP in colored decorative mortar can improve the adhesion, weather resistance, color stability and stain resistance of the mortar, making it more suitable for decorative exterior wall systems.
4.2. Gypsum materials
In gypsum plaster, gypsum putty or caulking agent, RDP can improve its adhesion and construction performance, improve its adaptability to walls and ceilings, and enhance film formation and durability.
5. Industrial and special applications
5.1. Self-healing mortar and high-performance concrete
In special projects (such as bridges, tunnels, etc.), in order to improve the toughness, self-healing ability and adhesion of the material, RDP is often added to improve the overall performance.
5.2. Gypsum board glue powder
As a binder in the manufacturing process of gypsum board, it improves the adhesion between the gypsum core and the surface paper, and enhances the overall strength and durability of the product.
6. Advantages Summary
Redispersible polymer powder shows the following advantages in a variety of applications:
Improve adhesion and flexibility;
Enhance crack resistance and water resistance;
Improve construction and workability;
Enhance the adaptability of mortar to a variety of substrates;
Prolong the open time and improve construction efficiency;
Improve freeze-thaw resistance and aging resistance.
As a key additive in dry-mixed mortar, Redispersible polymer powder has an irreplaceable position in the modern building material system. Whether in tile paving, floor leveling, exterior wall insulation, or in repair, waterproofing, crack resistance and other applications, RDP has demonstrated excellent performance and broad application prospects. With the development of green building materials and environmentally friendly and energy-saving buildings, the demand for Redispersible polymer powder will continue to grow, and its formula and technology will continue to innovate and optimize.
Post time: Jun-18-2025