Cboy, I have never used one of those kits, but I worked at a glass shop for four years. We used the really nice metal injector kits that worked good on most chips.
If you decided to try it you need to clean the center hole of the chip carefully with a pick so the fluid can get down into the crack.
When you inject the fluid do it slowly and you should see it fill the crack, if you do with to much pressure you will run the crack further out. Fun to watch but will ruin your day!
Good luck if you try it, let me know how it works.