What Role Does Redispersible Polymer Powder Play in Putty?

Redispersible Polymer Powder (RDP) is a versatile, water-dispersible polymer powder, comprising polymer resin, plasticizers, protective colloid, and additives. Typically, it features a vinyl acetate and ethylene copolymer, although other copolymers can be used. Plasticizers enhance flexibility, while protective colloids prevent coalescence during storage.

redispersible polymer powder for putty

Why add Redispersible Polymer Powder to wall putty?

Improved workability:
RDP enhances the workability of the putty, allowing it to be applied smoothly and easily on different surfaces. This ease of use makes it the preferred choice of building professionals.

Crack Resistance:
RDP’s flexibility and elongation properties significantly improve the putty’s resistance to cracking, ensuring a long-lasting and aesthetically pleasing finish.

Better adhesion:
RDP enhances the adhesion of the putty to various substrates, promoting better bonding and reducing the risk of peeling.

Enhanced water resistance:
The water resistance provided by RDP protects the putty from moisture-related damage, thereby improving its durability and performance over time.

Reduced Shrinkage:
The addition of RDP helps to minimize shrinkage during the drying process, ensuring a consistent and even surface.

What are the Different Types of Redispersible Polymer Powder?

Redispersible Polymer Powders come in various types and formulations, catering to different applications in the construction industry. Some of the common types of RDP used in wall putty include:

Vinyl acetate ethylene (VAE) copolymer:
VAE copolymers are the most widely used type of RDP in wall putty applications. They offer excellent adhesion, flexibility and workability on a wide range of substrates and conditions.

Vinyl Acetate Vinyl tertiary carbonate (VA/VeoVa) copolymers:
VA/VeoVa copolymers offer enhanced water and weathering resistance, making them suitable for exterior putty applications.

Acrylic Copolymers:
Acrylic copolymers offer excellent water resistance and UV stability, making them ideal for putty formulations in areas frequently exposed to moisture and sunlight.

Styrene Butadiene (SB) Copolymers:
SB copolymers offer improved adhesion and flexibility, making them suitable for challenging substrates and conditions.

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