The gaskets in our windows and doors are made of EPDM (Etylen Propylen Dien Monomer). This material was chosen because of uniqe physical and exploitation advantages in comparison with other materials. It's more resistible for getting old, high temperatures and external factors. Even more EPDM gaskets don't crack, are resist to ozone and are durable for stretching, ripping and squeezing. Our gaskets are black and grey as standard.