3M™ Dual Lock™ SJ3550 is a high-performance reclosable fastening system featuring interlocking mushroom-shaped stems that snap together to create a strong, secure, and hidden attachment solution.
Unlike traditional hook-and-loop systems, Dual Lock fasteners provide a firm, reliable engagement with an audible snap, ensuring proper closure and long-term performance.
SJ3550 utilizes a high-strength acrylic (VHB) adhesive designed for bonding to medium and high surface energy substrates such as metals, glass, and many plastics, making it ideal for demanding indoor and outdoor applications.