this product is actually a threebond product which is used to glue the windows to the lower frames which then clip on the regulator.
You can use butyl tape too, it'll be really messy to handle though.
btw - the congregation of words that come out of Pakistan are just epic.
butyl tape = japani glue (pronounce giloo or guloo)
hot glue gun insert = taiwan ki elfy
there are quite a lot of others too.