Hey Reese, what i did with cracks on my armor at first was with CA glue and 2 part epoxy as support as suggested by Jim but cracks still break maybe due to the flexibility of the material. A friend of mine who helped me with the painting of my armor suggested to use a cement of some sort that can be bought from a pharmacy used by dentist to make or repair dentures... it is very strong and can withstand flexing of the armor, i can no longer see the cracks. hope this can help.