If you're making a garage work bench there are a few low cost materials that are practical. MDF, Particle board, or plywood would work just fine for the surface and 2x4's of a pine or low cost wood would be just fine for the frame.
cody bell
Due to the elements and relative harsh exposure, concrete is the most common material to use for a garage floor. It is very durable and easier to clean than many of the alternatives.
If one looks around their neighborhood most benches will be made of wood and metal. While benches that are located in downtown areas (commercial) will more than likely see cement or plastic benches since they require less maintenance.
Patio benches can be found at several retailers such as Wal-Mart, Lowes, and most building supply stores.
The best material to use on garage flooring should be impermeable to most liquids as a garage may have leaks from automobiles. Typically the "best" garage floor is made of concrete with a coating on top to impede liquid leakage and collection.
Devin Carney benches 955lbs
dallascowboys/Larry-Allen
The long benches seen in churches are called pews.
Most accent benches are designed for interior use only however you can buy exterior accent benches that are constructed with materials designed to be used outdoors.
Nick Ambrosino 265.
They range from 105 - 350 pounds depending on size and the constructed material of the garage door. If you were to lift the garage door, it would feel like your lifting 25 pounds because the springs are supporting most of the weigh.
Most Practical