To add durability, use a heating Dienstprogramm to slightly melt the edges of seat belt webbing. This will help to prevent fraying of the webbing and increase its overall durability. Temperature: Withstands temperatures above 356 degrees Fahrenheit for some time; the melting point is around five hundred degrees Fahrenheit Seat https://www.webwiki.ch/www.ledteks.com/seatbelt-and-safety-belt-webbing