When choosing a rubber playground safety tile, the particle size of the material is an important factor. Medium-grade SBR rubber granules and SBR rubber powder are used to create flooring for gyms, fitness areas, and playgrounds, but they produce surfaces with different textures, appearances, and characteristics.
Understanding these differences helps identify the solution best suited to the project’s needs, environmental conditions, and intended use.
What Is the Average Granule?
The medium-sized granules consist of recycled rubber granules derived from end-of-life tires, generally measuring less than 3 millimeters. Their more open structure promotes drainage and makes this particle size suitable for outdoor use as well.
The surface is rougher and provides good traction; however, this very characteristic may require extra care during cleaning.
What Is “Polverino”?
The powder is a fine fraction of SBR rubber, generally less than 1 millimeter in size. It gives the tile a more compact, uniform surface with a velvety appearance.
It is often used in indoor applications, where its smoother finish and easier maintenance are appreciated. However, its overall performance—including wear resistance—depends on the product’s complete formulation, density, and construction.
The Main Differences
- Particle size: The average granule contains larger particles; the powder consists of a finer fraction.
- Surface: Medium-grit sandpaper creates a rougher, more open finish; fine-grit sandpaper creates a more compact, smoother surface.
- Drainage: The structure of the medium-sized granules can promote water drainage in configurations designed for this purpose.
- Cleaning: A surface made with powder is generally easier to clean because it is less rough.
- Uses: The medium-grain finish is also frequently used outdoors; the fine-grain finish is often chosen for indoor spaces and a more uniform finish.
Same material, different results
Medium-sized granules and fine powder are derived from the same base material and can be used in the same production process. It is the different particle sizes, along with the other components and production parameters, that determine the characteristics of the finished flooring.
How to Choose the Particle Size
There is no single “best” version. The choice depends on whether the installation is indoors or outdoors, the cleaning methods, the required drainage level, the desired appearance, and the expected performance for the specific application.
The Casei Eco-System team can assist designers and contractors in evaluating the most suitable product by providing technical information tailored to the project’s needs.