Redispersible polymer powder (RDP) is a type of synthetic polymer that is commonly used in putty powder. It is a white, odorless powder that is soluble in water. RDP is made from a copolymer of vinyl acetate and ethylene. When RDP is added to water, it disperses evenly and forms a stable emulsion.

RDP is used in putty powder because it improves the adhesion, flexibility, and water resistance of the putty. It also helps to prevent the putty from cracking and shrinking. RDP is typically added to putty powder in an amount of 1-5% by weight.

Here are some of the benefits of using RDP in putty powder:

• Improved adhesion: RDP helps to improve the adhesion of putty powder to surfaces, such as walls, ceilings, and wood. This means that the putty is less likely to peel or flake off over time.
• Increased flexibility: RDP makes putty powder more flexible, which helps to prevent it from cracking and shrinking. This is especially important in areas that are subject to temperature fluctuations or movement.
• Enhanced water resistance: RDP improves the water resistance of putty powder, which helps to protect it from moisture damage. This is important in areas that are prone to moisture, such as bathrooms and kitchens.

Overall, RDP is a valuable additive for putty powder that can improve its performance in a number of ways. If you are looking for a putty powder that is strong, durable, and long-lasting, then be sure to choose one that contains RDP.