What is CAN/ULC-S109?
CAN/ULC-S109 is a Canadian flammability standard for fabrics and the most important flame specification in Canada for textiles and films. Underwriters Laboratories of Canada is an independent product safety testing and certification organization. The standard says fabrics shall comply with two tests: the small flame test and the large flame test. The small flame test is very similar to CSFM Title 19, CPAI-84, and FAR 25.853. The large flame test uses a much larger flame.