As a cornerstone of the construction additives industry, redispersible polymer powder (RDP) can upgrade ordinary drymix mortar to high-performance materials. It significantly enhances the crack resistance, bonding strength, and durability of mortar. However, to adapt to diverse application scenarios, the wide array of complex RDP formulations makes selection a daunting task for users.
Core Classification of Redispersible Polymer Powders
RDP is primarily classified by its polymer composition, the fundamental determinant of its performance. Currently, commercial RDP products can be roughly categorized into four main types, with applications ranging from scenarios requiring low-temperature flexibility to those demanding extreme weather resistance.
1.Ethylene-Vinyl Acetate (VAE) Copolymer RDP
VAE-based RDP is celebrated for its exceptional flexibility and low minimum film-forming temperature (MFFT). It is an ideal choice for scenarios requiring high crack resistance and adaptability to substrate deformation. Longou offers several VAE-based options, such as the low-emission VAE RDP (ADHES®VE3011) and high-flexible VAE RDP (ADHES®VE3213). These formulations excel in low-temperature environments, as they form continuous, elastic films even when ambient temperatures drop to 5°C—critical for outdoor construction in cooler climates.
Typical Application Scenarios
External Wall Insulation Systems (EWIS): Ideal for base coats and finish coats of EWIS. It prevents cracking caused by temperature fluctuations and mechanical stress.
Masonry Mortar: Suitable for both interior and exterior non-load-bearing walls, it can enhance the workability and bond strength of masonry mortar.
Tile Adhesives (Interior): Perfect for indoor tile installation (e.g., residential bathrooms, kitchens) where moderate water resistance and strong adhesion are required.
Skim Coats and Putties: Reduces shrinkage cracks in thin-layer applications, delivering a smooth, uniform finish that adheres well to concrete or plaster substrates.
2.Styrene-Acrylic (SA) Copolymer RDP
Styrene-acrylic RDP is renowned for its superior water resistance, weatherability, and mechanical strength. Unlike VAE-based formulations, styrene-acrylic RDP forms rigid, durable films that withstand prolonged exposure to rain, UV radiation, and temperature fluctuations. It is perfect for exterior applications. ADHES®AX1700 is designed to enhance the durability of tile grouts, waterproof mortars, and exterior wall coatings.
Typical Application Scenarios
Exterior Wall Finishes and Coatings: It maintains color stability and surface integrity over years of exposure.
Waterproof Mortars: Used in waterproofing layers for basements, swimming pools, and roof decks.
Tile Adhesives (Exterior/High-Humidity): Suitable for outdoor tile installation (e.g., patio, balcony) or high-humidity indoor areas (e.g., commercial kitchens, public bathrooms).
Grouts and Joint Fillers: Prevents water and dirt from seeping into joints and avoiding resultant damage.
3.Vinyl Acetate-VeoVa (VAE-VeoVa) Copolymer RDP
VeoVa (vinyl versatate)-modified RDP combines the flexibility of VAE while leveraging VeoVa monomers to enhance weatherability, making it suitable for various interior and exterior applications. This type of RDP offers superior UV resistance and color stability. It is an ideal choice for colored mortars and decorative finishes.
Typical Application Scenarios
Exterior Decorative Mortars: Perfect for colored renderings, textured finishes, and decorative stone veneers.
Tile Adhesives for Special Substrates: Used for bonding tiles to low-absorbent substrates like glass, metal, or PVC.
Restoration Mortars: Ideal for historical building restoration
4.Acrylic Copolymer RDP
Acrylic copolymer RDP is a premium formulation composed of acrylic monomers, such as methyl methacrylate and butyl acrylate. Renowned for its exceptional chemical resistance, durability, and versatility, this product is specially engineered to meet the extreme performance requirements of specialized applications.
Typical Application Scenarios
Coastal and Marine Construction: Ideal for mortars in coastal areas, ports, and marine structures, where resistance to saltwater corrosion and humidity is critical.
High-Temperature Environments: Suitable for mortars in chimneys, boiler rooms, and industrial ovens, where conventional RDP may soften or degrade.
Specialty Waterproofing: Used in chemical-resistant waterproofing membranes, tank linings, and sewage treatment facilities, where exposure to corrosive fluids is common.
Conclusion: Choose Longou’s RDP for Reliable, High-Performance Mortar
Longou Chemical’s extensive RDP portfolio—backed by 15 years of industry experience, a dedicated R&D team, and global quality certifications—offers tailored solutions for every application.
Post time: Dec-24-2025