EPDM rubber is a single-ply commercial roofing system that can be installed; mechanically fastened, fully adhered with glue, or ballasted with river rock. EPDM rubber typically is installed using a solvent based glue at all horizontal & vertical seams. EPDM rubber commonly comes in a black color. It is lightweight, easy to install, very flexible, & can be installed on any type of roof, but is primarily designed for flat or low-sloped roofs. This roof system can be patched fairly easily due to tears or punctures.