The density of Styrene-Butadiene Rubber (SBR) can vary depending on the specific composition and manufacturing process. However, a general range for the density of SBR is:

0.91 to 0.96 g/cm³

This means that the density of SBR is typically slightly lower than that of water (1 g/cm³).

Here are some additional factors that can affect the density of SBR:

* Styrene content: Higher styrene content generally results in a higher density.

* Molecular weight: Higher molecular weight polymers tend to have a higher density.

* Filler content: The addition of fillers, such as carbon black, can increase the density of SBR.

If you need a more precise value for the density of a specific SBR, you should consult the material datasheet provided by the manufacturer.