Hair Extensions come in lots of colors, lengths and types. hair extensions, a well-known type, contain keratin bonding glue. Most types of fusion extension already have got the glue applied to them and require a small amount of heat to melt your glue. hair extensions are considered very good quality hair extensions from India. They're just sold with the cuticles nevertheless intact, giving them the most realistic look and feel. They are versatile and are available in any color or locks texture. Applying micro fusion hair extensions will take up to 10 hours to finish.