i bought a product called hardliner which is similar to the schwazkopf got2bglued as got2bglued is not avail in this country.the stuff never dried and stuck on.however when i put in on my hair.it does dry and get stiff like glue.it is expensive for me to order got2bglued from abroad but if it definitely works then i will.have any guys had problems with the stuff adhering properly.i a have a poly perimeter with lace middle.also have any guys used the vacuum pieces which require no adhesives at all?