Trim-A-Slab is a product made from exterior-grade materials designed to replace rotten or missing wood often found in driveways and sidewalks. Trim-A-Slab installs incredibly fast, looks great, and can be removed and replaced in case you need to run wires for outdoor lighting across your driveway. Trim-A-Slab is patented and AMERICAN MADE! Trim-A-Slab is the longest lasting and least expensive option to your concrete expansion joint problem.