Are these mats made of vulcanized rubber? Do they crumble and leave rubber pieces after some use?
Our 3/4" Extreme Mats are not vulcanized. These mats do have the potential to crumble a bit, but it should not be excessive to the point where the mat is fully falling apart. If the mat is from standard use, please reach out to one of our Flooring Heroes via email, phone, or chat, and they will be more than happy to assist you.