Our Eco-Flec Rolls do have a rubber smell to them, which will dissipate over time. There is no hard, fast rule as to how quickly this will go away. If you are sensitive to the smell, we do recommend mopping our rubber flooring with a mild soap and water solution and allowing the flooring to air dry. You will want to make sure the space where the flooring is being installed is well ventilated. One note, you may have to repeat this cleaning process a few times to help dissipate the smell.