How to glue the LCD to the glass on an iPhone 4?

im trying to find a product that is used or can be used to glue the iphone 4 lcd and glasss back together as one peice.

i know their nearly impossible to seperate, and you should buy as one peice. but my intentions are different. i was to glue or put the 2 parts back together without any problems and with similar results.

anyone have an idea?? or maybe somthing that can point me in the right direction.

i found a way to seperate the LCD and glass undamaged and now i need to put them back together.

so any help or advice??