The 3M Hook and Loop Fastener SJ3520 is a high performance PSA nylon hook and loop fastener with rubber adhesive and black polypropylene film backing. It provides a strong adhesive bond to a variety of surfaces, including many low surface energy plastics and powder coatings. It is designed for indoor use and has a thickness of 4.4 mm. Velcro is coated with a high performance rubber adhesive and offers medium temperature resistance up to +50°C long term (+70°C short term). The white nylon hook and loop fasteners are designed for indoor use and adhere well to paper and cardboard, paint, bare and painted metal, glass, sealed wood and many plastics.