Industrial tape is used for adhesive bonding, thread sealing, masking, packaging, wrapping, electrical insulation, ESD control and other specialized applications. There are four basic product categories: non-adhesive tape, single-sided adhesive tape, double-sided adhesive tap, and transfer tape. Non-adhesive industrial tape does not have an applied adhesive, but may be self-adhering. Examples include PTFE thread-sealing tape, a product more commonly known as Teflon^® tape (DuPont). With single-sided tape, only one side of the backing or carrier is coated with adhesive. With double-sided tape, both sides of the backing or carrier are coated. In some cases, two different pressure sensitive adhesives (PSAs) are used on each side. In others, double-sided products are supplied with a coated release liner. Transfer tape is highly versatile industrial tape that consists of a thin adhesive film without a carrier or backing. It can be transferred readily to most dry surfaces from a peel-away release liner.