Ends are not treated, simply taped to prevent fraying. A video is available for how the ends can be treated to prevent a more permanent solution to fraying, click here.
8 mm Marlow Viper is a Vectran / Polyester accessory cord designed for use as a high performance friction cord where heat generation is an issue or improved levels of grip are needed.
The high melting point of Vectran prolongs the working life of the cord in tough or heavy use conditions.