I want to say that I do not agree with a method – “Roll the bond between your fingers to create a cylinder”. That’s an old method – by making a cylinder you more damage a hair because keratin and extension are to much mixed with natural hair and later you have a big problem to get it off. I have a hair salon in Croatia in Split and we are working with So Cap Extensions and using their tehnology.
1. Take a small amount of natural hair and position hair extension on the top of it (natural hair has to be in the middle).
2. Using a heating tool (we are using one with infralight – find it on web So Cap) clamp down on the bond.
3. Gently with your fingers create a shape of package (keratin has a shape of square – left and right side of it bend under the natural hair).
Now, bond is flat and more invisible that the cylinder shape. If you hand to touch a hair, you can’t feel that extension is under.

Hope that I helped you and others with my suggestion.

Big kiss from Croatia,

Sanda

Ps. Sorry if my english is not so good!