I have a 600lb glute kickback machine that I want to place outside. Is this mat weatherproof ?

You can install our Tough Mats outdoors. These mats are very durable and can withstand the elements. Our rubber flooring is very slip-resistant and even more when wet. These rubber mats are also mold and mildew resistant. To keep the mats in place outdoors, we would recommend gluing them if you want a more permanent hold. You would use a polyurethane adhesive for this. If you are looking for a more temporary hold, you can use our double-sided tape.