Pre-bonded hair extensions, also known as fusion bonded hair extensions, are a popular method in the world of hair extensions. Despite the emergence of newer techniques like weft and micro rings, pre-bonded extensions remain a widely used choice among hair extension experts.

These extensions go by various names, including U-Tip, Flat Tip, Nail Tip, and Pre-Bonded, but they all refer to the same fitting technique. Pre-bonded extensions have a keratin bond at the top of every strand, which eliminates the need for utilizing loose hair during the fitting process. Instead, the hair strands are already glued.

A heat gun is used to apply pre-bonded extensions, melting the tiny keratin bonds to fuse with the client’s natural hair. The technician then shapes and cools the molten keratin, creating a strong bond.

Like all other types of extensions, pre-bonded extensions come with their own set of disadvantages and advantages. In this article, we’ll explore these aspects to help you determine if this method is right for you.

Pre-Bonded Extensions: The Beautiful World!

Pre-bonded extensions are highly sought after for several reasons. They are affordable, reusable, and versatile, allowing for strand-by-strand application for a natural look. These extensions are available in various textures, including curly, wavy, and straight.

However, the abundance of names for this method can be confusing. In this article, we aim to clarify the concept and provide a comprehensive understanding of pre-bonded extensions.

prebonded hair extensions

  1. What Are Pre-Bonded Keratin Hair Extensions?

Pre-bonded hair extensions are hair strands fused together using keratin glue. They come in various forms and are known by different names, including bonded extensions, fusion bond hair extensions, and keratin pre-bonded extensions. The type of bond used distinguishes them, such as:

– I-Tip: Featuring an “I”-shaped tip.

– Nano Tip: A very thin “I”-shaped tip.

– U-Tip: Having a “U”-shaped tip, often referred to as nail tips.

– Flat Tip: With a flat top.

– Micro Ring: A ring is attached to the strand, which is hollow in shape.


  1. Differences Between I Tip and U Tip Extensions

I-Tip extensions are applied using micro-rings, while U-Tip extensions are applied with heat fusion. The choice between these methods depends on your hair type, and professional installation is crucial to prevent hair damage.

prebonded hair extensions

  1. Fusion Bond Hair Extensions

Fusion bond hair extensions, like I-Tip and U-Tip extensions, are attached using heat. The tips of the extension strands are fused to your natural hair with a specific heat tool, using keratin glue. These extensions should only be fitted by certified professionals to avoid damaging your natural hair.

prebonded hair extensions

  1. Are Bonds Not as Good as Nano Rings?

Nano ring extensions are another type of pre-bonded extensions that do not require heat for application. However, if applied improperly, they can cause significant damage. Consult a knowledgeable expert when choosing the type of hair extensions, and always have a professional install them.


  1. How Are I-Tip Hair Extensions Used?

I-Tip extensions are applied using micro rings and a threader tool, secured with pliers. Professional installation is recommended to ensure proper attachment and avoid damage.


  1. How Many Bonded Extensions Are Needed for a Complete Head?

The number of bonded extensions required for a full head depends on the desired volume and the capacity of your hair. Typically, 100g of hair is sufficient for an “average” head of hair, but some individuals prefer more.


  1. Duration of Pre-Bonded Extensions

The lifespan of pre-bonded extensions depends on how well they are cared for and how often they are repositioned. Proper maintenance can extend their life to four to six months.


  1. Are Pre-Bonded Hair Extensions Reusable?

Pre-bonded hair extensions are reusable if well-maintained. Inform your extension specialist if you plan to reuse them to ensure careful handling during installation and removal.


  1. Can Your Hair Be Damaged by Pre-Bonded Hair Extensions?

Properly fitted and maintained I-Tip, U-Tip, and pre-bonded extensions should not damage your natural hair. Choose a trained specialist for installation and follow their guidance for maintenance to keep both your natural hair and extensions in top condition.


Pre-Bonded Fusion Hair Extensions’ Benefits:

– Add volume and length to your hair.

– Customizable to match your hair color with highlights and lowlights.

– Minimal maintenance required, reducing upkeep expenses.

– With proper care, pre-bonded hair extensions can last four to six months.


The Drawbacks of Hair Extensions That Are Already Bonded:

– The use of heat during application.

– Removal involves using an acetone solution, which can be damaging.

– Strands cannot be reused if they are pulled out during brushing.

– Maintenance is necessary to avoid a “grown-out” look.

– Heat and certain products can affect the bonds’ integrity.

– Some find this method less “natural” due to firm ties and roots.


In summary, pre-bonded hair extensions offer various benefits and drawbacks. It’s essential to choose a method that suits your needs and preferences, and always seek professional guidance for proper installation and maintenance.