Is there any rubber smell to these tiles? I've purchased other rubber matting, and the off-gas was very strong.

There is a rubber smell to our 3/4" Shock Tiles that can be stronger than some of our other rubber tiles. To help mitigate this smell, we recommend mopping the floor with a mild soap and water solution with a synthetic mop. You will then want to let this air dry in a well-ventilated area. To truly get the smell to dissipate, you may have to do this a few times.