Ok mate --that clarifies it --the i-glue is less strong and the fact that you are in very hot conditions will affect the bond . Another little tip to help you keep the lace front bit folded back while you work on applying the glue -- just fold it back flat, then catch a small tuft of the hair from the fringe,and `clip`it to another bit of hair under it using a clothes peg -the things you use to keep clothes on a clothesline --- don`t pull it tight or anything like that --you just want to hold it back out of your way for a few minutes while your glue goes off a bit. I`m not sure about the Ultrahold, but I have often blown the glue with a warm hairdryer ---speeds up the time it takes to go off. I`m sure the scalp protector and Ultrahold will sort out your issue. Paul.