Handy for rolling out stubborn seams. They come in two types. This one has a barrel curvature which is useful for rolling out serpentine cuts.
This narrower roller has a cylindrical
sleeve. Physics says it will want to track in a straight path - which is good over large spans of straight cuts when used with the heavier canvas-type of coverings, but the hard edges will want to
leave creases on lighter papers.
Don't overuse this tool. It's fun to use, but it's for getting joints to lay flat and even. Overuse will squeeze the glue out from where you need it most. And no glue = no stick =
callback.
If that one seam won't stay put - if you have had to stretch and coax your vinyl into place, and it still wants to shrink back and open up a few minutes later, it's most likely just too wet.
Speed-dry that stubborn seam with a hair-dryer while rolling over it. Use a low heat setting - you don't want to discolour or melt the work.
Don't use a commercial paint-stripping gun. This 1500 watt-er is designed for just that - burning off old paints. And actually, why would you want to do that - except to re-engineer your chromosomes?
