3M™ Dual Lock™ Reclosable fastener SJ3540 has a rubber based adhesive on the back of a black, polypropylene reclosable fastener and has 250 stems per square inch with a 0.23 inch engaged thickness. The closure life is 1000 times and low temperature performance with a temperature resistance of up to 120°F and is for indoor use only. This product is for use with many plastics (acrylic, polycarbonate and AS, powder coated paints and low surface energy materials (polypropylene and polyethylene).