Mate, you can use the spray cans by all means andvyou won't need a roller. A lot of converter companies use the spray glue. Which ever glue you use I would suggest the you lay the Altro floor as a trial fit and trim. Then working facing the drivers side of the inner wall, roll the altro floor back towards you, apply the glue to the floor from front to back of the van in a strip about 1ft wide then press the floor back down. Once you have the altro floor in position weight it down with books car batterries etc etc. Leave it overnight. When it's dry and set the altro floor will be anchored down and won't shuffle about as you continue to glue the floor down, this time working facing the passenger side inner van wall. Roll the floor back towards you until you have rolked back to the glue line previously set. Apply the glue again in a strip about a foot wide from front to back of the van. Unroll some of the altro flooring to cover the glued area and press into place. Repeat until you work up to the bottom of the passenger side of tge van wall. Again spread weights etc across the freshly glued floor area.
Note* if you use the same stuff as I did, so as to eliminateumps and bubbles in the flooring you will need to obtain a roller used for rolling lino flooring down onto glued floor. Sorry this is long winded and I am pro teaching to suck eggs - but I hope it helps.
Gently - Gently Catchey Monkey.
