Use nylon thread for sewing almost anything that requires strength and durability. It is strong, easy to use, and a great choice for sewing fabric, leather, canvas, and vinyl.
Nylon Thread Limitations
Outdoor applications with prolonged sunlight exposure. Nylon thread can withstand moderate exposure to sunlight, provided that it is not exposed long term, or there is some sort of ultraviolet (UV) protection (e.g. windshields, or unexposed seams).
This is why it is popular for automotive interiors, upholstery, and many other applications.
It should not be used for outdoor furniture and sewing sails, awnings, tarpaulins.