3M™ Dual Lock™ Reclosable Fastener SJ3540 has a rubber based adhesive on the back of a black, polypropylene reclosable fastener which makes it suitable for bonding many plastics, powder coated paints and other low surface energy materials. Our Dual Lock™ Reclosable Fastener SJ3540 has 40 mushroom shaped stems / cm² with a 5.8 mm engaged thickness.

• Black fastener with mushroom shaped stems that is backed with a rubber based pressure sensitive adhesive
• Type 250 which mates to Type 170, 250 or 400. Closes with an audible snap
• Designed to bond to many plastics, powder coated paints and other low surface energy materials
• Opens and closes 1000 times before losing 50% of its original tensile strength
• High initial tack
• Indoor applications
• Trial bag