Despite sounding somewhat “sciencey”, this type of permanent hair extension is one of the oldest extension methods. 

It is highly popular among celebrities due to its seamlessness (no one will be able to tell your own hair from extensions).

The way the hot fusion technology works is rather simple: 

• hair extensions are applied to your own hair in small strands, each covered with special keratin glue at the end.

• an extension iron is used to melt the glue and solidify the keratin bond.

• the temperature required to melt and apply bonds properly is around 200-220°C, which is why hair stylists use special shields to protect the client’s scalp from heat.

• You can wear them for up to 3 months before the next correction procedure.
• Extensions blend seamlessly with your own hair creating a natural look.
• If the extension procedure is done right, the keratin bonds are barely visible.
• Ultra-comfortable to wear.
• You can tie your hair in a ponytail.
• It's safe: the bonds are made from keratin glue, which is a hypoallergenic material. Especially, it is important for those with sensitive scalp.
• It’s universal: this type of hair extensions is suitable for everyone. Whether your hair is thin or dense, curly or straight, blond or brunette - it will help you to achieve the required length and volume.
• With proper selection of hair type and structure as well as professional application, hot fusion hair extensions can be used even with short and thin hair.
• It’s convenient: with properly selected and attached keratin fusion extensions, you will never feel any discomfort. It’s like the natural extension of your own hair!
• It’s durable: if you follow all the recommendations from your hair extension stylist and take proper care of your extensions, they will last you up to 9-12 months with timely reapplication procedures.
• It's versatile: keratin fusion hair extensions can be used to create any hairstyle: ponytail, braids, curls or straighten your curls just like you did before the extensions.
• if you decide to color your hair to hide gray hairs or to change up the style - you can. However, you will need to check with your hair extensions stylist regarding strong blond colors, as chemical components may damage the bonds.
• It’s perfectly concealed: one of the main fusion hair extensions advantages is that no one will ever know you’re even wearing them. They blend in perfectly with your natural hair. Now, you can even use colored keratin glue to get hair extensions that match your own hair color. Your styling will always look natural and you will always feel confident!

• The extension procedure itself takes quite some time: you have to be prepared to spend 3-4 hours getting your hair extensions applied. The duration of the procedure depends on a number of factors, such as the amount of material and the qualifications of your hair extension specialist. In addition, the stylist will need to spend time on hair extensions removal, re-bonding and re-application each 2-3 months. Hair extension removal takes about an hour, and re-application takes about the same amount of time as the initial application.
• Use the hair iron, blow dryer or curling iron with extreme caution to make sure their hot surface does not come in contact with the keratin bonds.
• Can be done only at a salon. Fusion hair extension procedure is not something you can do by yourself at home, as there’s a risk of damaging your hair and scalp. This also applies to hair extension removal, which should be done by a hair extension specialist.
• May cause slight discomfort: some women report that it took them several days or even weeks to get used to the newly installed hair extensions. There’s also a small number of people reporting itching and headache.
• To avoid these problems, we recommend using micro keratin bonds. They are very easy on your hair and you can barely feel them.
• Requires proper care and maintenance on a regular basis. If you rub your hair too hard while washing or brush it with a regular hairbrush, you risk losing the original gloss, volume, and beauty.