I wrote this in response to a different post, but since it's a similiar topic i will post here too (Also, sorry this response is a bit of a novel..l but I'm PASSIONATE about this!!)
I have the same exact problem that you have with the keritin glue breaking down/getting mushy!
I have been through 2 installs and I'm trying to find a better way to glue my extentions together!
I cut my human hair from a weft and use a wand to melt down my keratin glue sticks and then slide the hairs through several times to get a good coat of glue throughout the strands. I roll into an i tip with silicone finger pads until the glue is cooled. Then I wait about a week before I install with microlinks.
I do my best to keep shampoo off the bonds when showering and on the rare times that i use conditioner i only condition the ends of my hair. I also try to blowdry my roots quickly so the bond's don't stay too wet.
Alot of my strands fall out within the first month, then even more as the months go on. I was impressed to hear someone only have TWO fall out in a 4 month install as I have lost about 3/4 of my install in 4 months! (Though I have a lot more than 50 strands. I have about 350 in)
I have noticed that when i use the keritin glue to tip synthetic hair.. it stays much better. The glue stays hard for a very long time on the synthetic hair, but I only use synthetic for small streaks of color from time to time. I don't use it for a full install (awful tangles and snags). I wish I could figure out a way to make the glue stay stronger on the human hair that I am using!
I went to the hardware store last week to find an adhesive that was weather-resistant, thinking that the water was causing the keratin to breakdown over time. I just 5 mins ago tried to use this glue but it was worse than the keratin! Much more flexible and gummy-like so don't waste your time there (at least not with loctit stik and seal ultra glue).
Have you tried this method yet? Have you had any sucess?
Have you figured out any other way to bond the hair? Have you used liquid gold?
I am next going to try to create my tips with keratin and then coat with a nail glue or fast drying super/crazy glue.
Maybe we can figure this out together.
Looking forward to your response or anyone else that has the solution!
In response to your problem about not fitting enough on your head for fullness, try these 4 things:
1. i think it may benefit you to ask another freind that can see your scalp from the back to help you with your install. When i do my install i tell my girlfriend to take a very small amount of my own hair for each strand of extension( i also want thickness as i have very thin hair and not a lot of it!). It may help for you to SHOW your friend exactly how she needs to do it by using a barbie doll to show her how much hair she should take and how to part it etc...
2. i make about 300-400 i tips with the keratin glue and sometimes my friend will have to fit the last 100 in by doubling up on hair that already has extensions attached to it.
If you can picture it: some of my own hair will have an extension attached near the scalp. Then she goes back and places one just beneath the one we just attached. sometimes she will attach the second strand to my natural hair, or my natural hair and the extension hair.
However, it's important to mention that I use microlinks to do this so that i am not bonding any glue to my natural hair or further down onthe extension hair. Also, if they slip early on in the install it is easier for me to reinstall myself
3. Try using microlinks for your install instead of just fusion. I have my own issues with keratin breaking down so by adding a microlink to the install you will be adding another level of security. Maybe the nest time you do your extensions you can do some with just fusion, some with microlinks and some with a microlink and then melting down to create fusion with your natural hair? I have never done it but if you are already using the fusion method you might as well try this and see how it works.
4. You NEED the right hair cut. You cant just add all the hair in at the same length and expect it to look good. I have my friend cut my hair into long layers. Some extension hair she will cut just as short as my own hair! This makes the hair blend into one unified layered look. Since heavier hair will tends to weigh down and fall more flat you need to cut some of those extensions as short as your own hair to lighten the load. By getting a layered cut that doesn't sacrafice the overall length you are going for.. will make it look thicker.
If you go to a salon for your hair cut explain to them exactly what you need them to do and ask for LONG layers .
I hope this makes sense.
GOOD LUCK! Let me know how your next install turns out!
Overall -the problem is i DO still have the keratin glue issue. Some bonds becomes mushy and slide down considerable. others slide down to the point where they fall out or i need to take them out because they are just too low. Have you tried anything else since your post to help solve this??