Round vs. Flat Attachments

With traditional thermal fusion, I use a special application tool with heat to soften the keratin bond and form a small, rounded attachment around your natural hair.

Cold fusion uses a lower heat setting and a slightly different application technique to create a flat attachment.

Both are very discreet, and once the extensions are installed and blended with your natural hair, it's nearly impossible to tell which type of attachment was used.

The shape might seem like a small detail, but it can make a difference in how I distribute the extensions, how they feel, and how we achieve your desired look.

Why Would I Choose Flat Attachments?

Depending on your natural hair, head size and shape, and the look we're trying to achieve, I may recommend flat attachments for several reasons.

For fragile or delicate hair

When I'm working with particularly fragile hair, flat attachments may give me another option for distributing the extension hair. I carefully evaluate how much natural hair is supporting each attachment, regardless of which method I use. Weight distribution is essential especially when adding extended length and plush volume. 

For customized color placement

Flat attachments can accommodate a little more extension hair in an individual piece. This can be especially useful when I'm distributing highlights, lowlights, or pops of fashion color throughout the hair.

Rather than adding lots of tiny individual pieces, I can sometimes use fewer, slightly wider attachments to achieve the color placement I want.

For comfort and easier removals

Some clients find flat attachments more comfortable than rounded bonds, although most clients don't notice much difference at all.

I've also had clients who have had past difficulty tolerating the removal of traditional thermal fusion K-tips. When that happens, I'll use flat attachments at their next installation.

It's one more way I can tailor the experience to the individual.

Can You See the Difference?

These photos are a perfect example of how subtle the difference really is. And the bright color of these highlights is the perfect way to give you a clear picture of just how they differ.

round attachments ktips thermal fusion Great Lengths flat attachments ktips cold fusion Great LengthsIn the first photo, I'm installing bright pink and lime green K-tips on the side of her head using traditional thermal fusion, creating small, rounded attachments.

In the second photo, as I move towards the back of the head, I've switched to flat attachments.

Look closely at the attachment points. Even with these bright fashion colors, the difference between the round and flat bonds is barely noticeable.

Imagine how discreet they'd be with extensions that match your natural hair color!

You can also see that the flat attachments allow me to work with slightly more hair in each piece. That's particularly helpful when I want to distribute colorful accents or highlights in a very specific way.

Not Every Extension Salon Offers Flat Attachments

Applying flat keratin bonds requires a specialized tool or application technique, so it's not something every hair extension salon offers.

At Glo Extensions, I specialize in Great Lengths keratin bond extensions so I work with both thermal and cold fusion, and both flat and round attachments because I don't believe in a one-size-fits-all approach.

My goal isn't simply to install beautiful hair. It's to choose the right hair, the right placement, and the right attachment technique for the person wearing it.

Which method is better?

Neither is automatically better. For most clients, traditional round K-tips work beautifully. For others, flat attachments offer advantages in comfort, placement, or customization.

And sometimes I may use both techniques in the same installation.

That's the beauty of customized Great Lengths extensions. Even the smallest details can be tailored to your hair.

Learn more about my Great Lengths Services.

Complimentary Great Lengths Consultation

Great Lengths extensions require planning, customization, and honest assessment. That’s why every extension journey at Glo begins with a free consultation.

During your consultation, we’ll:

  • Evaluate your hair and goals
  • Discuss method suitability and maintenance
  • Create a personalized recommendation
  • Answer questions about longevity, care, and investment

Use the consultation request form, text 720-591-6906, or call 303-968-4222 to schedule your consultation.

Check all that apply. Consultations are free of charge.
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This woman is amazing. I flew in from Wisconsin. I was growing out my grey and didn’t want to lose my length. She met with me online prior to our appt. Picked appropriate shades and was ready for my arrival. We spent the entire day together. Overall adding 480 sections of hair. The results were asto... read more

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Heather is incredible ! She truly is a hair extension artist. I'm almost a year into growing out my silver/natural hair and was in not a good place with my grow out process, so far. I have fair skin, light eyes and had dyed my hair for over 30 years, dark chocolate brown. I've shared my inspiration... read more

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I am so happy I found Heather to help with my transition to gray hair. The extensions helped boost my self confidence along with the acceptance of my graying hair. It was the right choice for me to not keep coloring my roots every 2 weeks and also not feel frumpy with the skunk hair stripe. I now lo... read more

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Heather is amazing!! She is very thorough with her consultation and her highlights are my favorite! Blonding services can be hard to find, and she is a real pro! I love the way she styled and did my hair!

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Heather is amazing! She is very talented easy to talk to and very sweet. Her room was beautiful. She matched my extension color seamlessly. She is so talented. If you’re looking for an extension specialist she’s your girl!

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Heather is amazing!! I travel in from out-of-state every few months to have her color my hair and to add extensions because there is no one greater than she is at it. I've been coming to her for years and always get compliments. I have very thin hair and she is a magician. If you want true quality,... read more

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Heather is AMAZING! I moved to Denver from Houston a few months ago, was looking for a new hairstylist, and found Glo Extensions after some extensive research. I’ve been dying my hair blonde for over 10 years and the only experience I had with extensions were sewn in wefts. During my consultation, I... read more

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Heather did such an amazing job! I have fine thin hair and wanted to add some volume and a bit of length so we opted for ktip extensions. She color matched me PERFECTLY and my extensions look amazing! I left today feeling so confident

K Camacho
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Heather is the best! My K-tip extensions and color look stunning. I’m obsessed. Thank you, thank you, thank you! I love my hair! I’m a client for life!

Mel Pavel
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Heather has been doing my hair for years. I can honestly say her skill with color and hair extensions is unmatched. She is able to blend my color and cut flawlessly and I get so many compliments on my hair. Red is not an easy color to maintain but I swear the red she creates lasts and my extensions... read more

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Heather is truly the best of the best at what she does. I have been to several salons for extensions, and no one compares to her. Her knowledge and expertise have kept my hair healthy and growing so much that I don’t even need extensions anymore. That alone says everything. She is also the only styl... read more

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BEST HAIR EXTENSIONS EVER. I love everyone who works here, they are so sweet, fun, and extremely good at what they do. I’ve been coming for about 3 years. I took out my extensions in August but I couldn’t stand not having them in so I got them back in during December. You do not even need to get ext... read more

Expert Answers to Common Hair Color Questions

How are ktip extensions attached?

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Each extension strand is pre-tipped with a keratin bond. The bond is gently fused to your natural hair and shaped by hand to create a secure, discreet attachment that moves naturally with your hair.

Will Ktip extensions damage my hair?

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When applied and removed correctly, fusion extensions should not damage your natural hair. Proper technique, correct placement, and professional removal are essential, which is why experience matters with this method.

How much do ktip extensions cost?

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Pricing varies based on the amount of hair needed and the final result you want to achieve. Fusion extensions are considered a premium service, and most installs are priced accordingly. You will receive exact pricing during your consultation.

Will ktip extensions work for my hair?

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This depends on your hair type, density, and overall condition. Fusion extensions work well for many clients, including those with finer hair, but the best way to determine suitability is through a consultation.

Can ktip hair be re-used?

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No, the hair cannot be reused. Keratin bonded hair extensions are long lasting and don't require any move-up appointments. But these fusion extensions must be professionally removed at the end of their lifecycle and new ones applied. .

What's the difference between flat and round K-tip hair extensions?

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The main difference is the shape of the keratin bond attachment and how it's applied. Traditional thermal fusion creates small, rounded bonds, while cold fusion creates flatter attachments. Both are discreet, flexible, and designed to blend naturally into your hair.

Flat attachments can be particularly useful for fragile hair, customized color placement, or clients who find them more comfortable. They can also accommodate slightly more extension hair per attachment, giving Heather additional flexibility when distributing highlights, lowlights, or pops of color.

Neither method is necessarily better. Heather chooses flat or round attachments based on your natural hair, head shape, desired look, and personal comfort. She may even use both methods in the same installation.

What's the difference between thermal fusion and cold fusion?

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Both methods use keratin bonds to attach individual Great Lengths extensions to your natural hair. The main differences are the application technique, heat setting, and shape of the finished attachment.

Thermal fusion uses a controlled, low-heat tool to soften the keratin and create small, rounded attachments. Cold fusion uses a lower heat setting and a different technique to create flatter attachments.

Both methods produce secure, discreet bonds that blend naturally into your hair. Heather may recommend one over the other based on your hair's condition, desired color placement, or personal comfort. Some clients prefer the feel of flat attachments, while most notice little difference between the two.