3M™ Dual Lock™ Reclosable Fastener SJ3560 is a clear acrylic adhesive on the back of a clear polypropylene reclosable fastener. 250 stems per square inch. .23 inch engaged thickness. Closure life 1,000. For indoor and outdoor use. Highest temperature performance, temperature resistance 220 degrees F. For use with metals (aluminum, stainless steel), glass, and high surface energy plastics (acrylic, polycarbonate, ABS).