Cold fusion is a method of attaching hair extensions without using heat, which can damage existing hair. ExtenTube, x10D and So Cap are among the brand names of cold fusion hair extensions.
Tube cold fusion uses metal attachment rings that bind existing hair with a fusion strand. The hair and strand are placed inside the tube, which is then clamped shut. Removal involves using the same clamping tool to open the ring, which slides right off the existing hair.
Ultrasonic cold fusion strands are tipped with a polymer that is cured to the hair by an ultrasonic attachment tool. The attachment process and wearing is similar to heat fusion extensions, but does not affect the underlying hair. A specially formulated solution is used to dissolve the bond for removal.
Cold Bonding is a type of attachment in which a polymer-based glue is applied to strands or a strip of wefted hair and then attached at the scalp. Though this can be modified into heat bonding with the use of a blowdryer, forgoing heat is healthier for both hair and scalp. Cold bonding glues are removed with formulated serums, though it is possible to remove some glues with natural alternatives, such as citrus oil.
Cost and Results: Six to eight ounces is the recommended amount to achieve a full fusion hairstyle, which can cost up to $300 for the best quality human hair. Only human hair should be used for fusion since this is a semi-permanent method. Application services can be an additional $1,000, not including regular maintenance.
Wear and Care: Because fusion hair is human hair, it can be styled and conditioned just like regular hair, including the use of curling and flat irons. When combing, start at the ends and work toward the scalp to avoid pulling, and use a looped brush at the scalp to avoid snagging or damaging the bonds.