In my photo darkroom I have a Seal tacking iron I use for dry mounting prints. It’s 145W and when it’s set on high it’s working really well for doing the floor welds. The bottom is teflon coated which is nice.
It is a bit too wide for the tube strips. I may be able to make it work but I have an aliexpress iron showing up any day just in case.
I also have a big roll of silicone-coated release paper that works really well for putting underneath when welding.
