3M™ Plasticizer Resistant Hook Fastener SJ3522 is one part of a two-part fastener solution designed to provide great durability for thousands of closures. With its plasticizer resistant, acrylic-based pressure sensitive adhesive backing, this fastener allows for easy and convenient attachment to a variety of substrates, especially flexible vinyls. - 3M plasticizer resistant hook fastener SJ3522 offers a wide variety of closure alternatives, including zippers, screws, snaps, hooks and bolts. The fastener is covered with flexible J-shaped hooks on a woven backing. It features a unique pressure sensitive adhesive that resists softening or oozing caused by most plasticizer oils in flexible vinyl and similar materials.