I'm a college students, who needed a glass showcase box(5inchx7inchx4inch) to present my project well. So, in order to make one, I appraoched the nearby hardware shop. There, they made me a glass box as specified. But, the glue is still gooey. It has been 3 days and the glue doesn't cure. What type of glue they would have used to stick the glass sides together? Will it cure sooner cuz its already been 3 days?