i have used Quick Grip cement-about 2.75 or so for a large tube
clear, gel like-meant for fabric decorations
have used it now for about 2 years
this type (not necessarily the brand ) is recommended by Tom Muella in some of his kits as i recall
its great glue
heres why i love it and pass it on
its viscous, it sticks with little run, minimal odor, and it sets up in about a minute, so you can glue walls or a roof, adjust and slide things for proper alignment or squaring, and then hold it for ten-twenty seconds and youre done--quicker than styrene cement, cleaner than goo, stronger and more gap filling the acc (all have thier place of course)
will hold flat even those occasionally slightly warped, thick pola roofs
while i havent tried to pull things apart after drying, i suspect that the glue will let go with heavy even pressure -there is no 'welding; like styrene solvents, and may even allow for a clean removal of old glue-it strikes me as similar to a vinyl caulk