Made with 100% recycled synthetic rubber, Eco-Joint expansion joint filler is flexible, lightweight, UV stable, and chemical resistant, says the maker. The product can be used as an expansion or control joint on roads, sidewalks, driveways, flooring, patios, and more. It is non-extruding and is compatible with hot and cold joint sealants. 847.214.2100. www.wrmeadows.com.