Rust-Oleum Universal Patching Fabric is a stitch bonded polyester fabric that provides physical strength and superior elongation to thermal stress movement without tearing. Strengthens seams, small cracks, joints and more. Resistant to rot and decay for long lasting protection. Compatible with acrylic, asphalt emulsion, asphalt and solvent base coatings as well as with common roof cements, sealants and mastics. Conforms to irregular surfaces.