One of the finest hair extension procedures according to numerous experts is tape-in extensions. They are a semi-permanent solution where 3–4 cm long hair strips are adhered together using polyurethane (PU) glue. You can apply the tape so that the polyurethane is visible, then cover it with a fine hair veil. Your natural hair will be "sandwiched" between two pieces of tape by placing a second tape directly on top of the first