Can you put this over radiant floors? Will is gas?

You can use our 3/4" Extreme Mats over radiant flooring. Since rubber is an insulator to a certain extent, you may not get the full effects of your radiant floor system if you were to install these rubber mats over it. Our rubber flooring does off-gas when you get the flooring, but this off-gassing is not due to being installed over radiant heating. Any smells that you notice, you can knock out by mopping the rubber flooring with a mild soap and water solution with a synthetic mop head.