REFLEX® rubber expansion joint filler is made from 100% post-consumer rubber & plastic. The majority of the rubber comes from old tires that you see littering the shoulders of highways and overflowing landfills. When using REFLEX in the construction of just one single family residence, builders are able to consume the equivalent of 8.3 passenger car tires. So when planning your next project choose reflex. REFLEX® is a rubber expansion joint filler that is the first of its kind. Made from recycled materials, it is environmentally friendly, top of the line in quality, and made in the USA.