What Is Double Sided Tape?

Double sided tape, also known as double-coated or double-faced tape, is an adhesive tape that has pressure-sensitive adhesive applied to both sides of a carrier material, often with a removable release liner protecting one side. This design allows the tape to bond two surfaces together invisibly, eliminating the need for mechanical fasteners like screws, rivets, or liquid glues. The "carrier" or backing inside can vary widely: tissue paper (general purpose), non-woven fabric (conformable for irregular surfaces), PET film (high strength and clarity), foam (acrylic or polyethylene for gap filling and vibration damping), or transfer tape (adhesive only with no carrier). The adhesive types differ by application: acrylic adhesives offer excellent UV and aging resistance, rubber adhesives provide aggressive initial tack, and silicone adhesives adhere well to low-surface-energy materials like silicone rubber. Double sided tape is a workhorse in many industries. In automotive manufacturing, it attaches emblems, side moldings, and interior trim. In electronics, thin PET-based double sided tape bonds smartphone screens, batteries, and flex cables. In home improvement, foam double sided tape mounts mirrors, baseboards, and picture frames. Crafters and offices use acid-free, repositionable double sided tape for scrapbooking and document mounting. A key advantage is stress distribution—the continuous adhesive layer spreads loads evenly across the entire bond area, unlike point fasteners. Selection involves several considerations: the surface energy of substrates (e.g., high-energy metals vs. low-energy polyethylene), expected service temperature, UV exposure, and whether the bond needs to be permanent or removable. Quality double sided tape requires proper surface cleaning and often the application of pressure or a roller to ensure full adhesive contact. Unlike glue, there is no drying or curing time, providing instant handling strength. The release liner is typically silicone-coated paper or PET, which is peeled off just before application.