Silicone hydrophobic powder (SHP), also known as silicone water repellent powder, is a fine powder made of hydrophobic silica, which is coated with a layer of silicone, with strong hydrophobic effect. 

Free flowing powder be added to dry ingredients of cement based dry mixes in order to achieve water repellency with very low dosage and reduce your cost.

This powder is known for its ability to repel water and resist moisture. In this article, we will explore the properties and uses of silicone hydrophobic powder in more details.

Properties

Hydrophobicity

The most important property of silicone hydrophobic powder is its ability to repel water. The surface of the powder is coated with silicone, which forms a barrier that prevents water from penetrating the surface. This hydrophobic property makes it ideal for use in construction such as mortars, concrete and coating where water resistance is required.

Low Dosage

After mixing with other dry powder components,the recommended dosage is 0.3%~1% by weight of dry powder,which hardly affect the compressive strength of the materials, the 48h water absorption is far superior to standard JC 474-2008. 
High Surface Area
The surface area of silicone hydrophobic powder is typically high due to its small particle size. This high surface area allows for better adhesion to surfaces and improved water repellency.

Chemical Stability

Silicone hydrophobic powder is chemically stable and does not react with most substances. This makes it ideal for use in a wide range of applications.

Heat Resistance

Silicone hydrophobic powder is also heat resistant, which makes it suitable for use in high-temperature applications. It can withstand temperatures of up to 300°C without losing its water-repellent properties.

Applications

Construction

Silicone hydrophobic powder is used in the construction industry to provide water resistance to building materials.
Increase water repellency and reduce water penetration and absorption in all types of waterproofing cement-based construction materials, including concrete, cement, joint fillers, stucco, EIFS, exterior and interior plaster, grout, mortar, and more. The powder can also be used to treat building facades and other surfaces to prevent water penetration and damage. It is suitable for all kinds of mortars/concrete that need to prevent the penetration of liquid water, and improve the hydrophobic ability and durability of the mortar itself.

Coatings and Paints

Another most common uses of silicone hydrophobic powder is in waterproofing coatings and paints. It is added to coatings and paints to provide water resistance and to improve the durability of the coating. The powder can be added to both water-based and solvent-based coatings, and it can be used in a variety of applications, including industrial coatings, marine coatings, and architectural coatings.

Shandong Kundu Chemical Co., Ltd. is a professional construction chemicals factory aiming at manufacturing, supplying and exporting of chemical admixtures. Whether you need more information, a quote, or advice for a project, we would be delighted to support you.