3M™ Flame Resistant Loop Fastener SJ3418FR is one part of a two-part fastener solution designed to provide great durability for thousands of closures. The flame resistant, non-adhesive fastener is most commonly sewn, but can be attached with a variety of hot melt or liquid adhesives. This fastener allows for easy and convenient attachment to a variety of substrates. - 3M flame resistant loop fastener SJ3418FR is one part of a two-part fastener solution designed to provide great durability for thousands of closures. These remarkable fasteners can be opened and closed over and over, up to 5000 times before losing 50% of the original strength, for repeated access and repositioning.