Sorry didn't reply straight away kaz, yes Martin is right about the frog juice, I don't use it on subli items but for the canvas printed on my Epson wideformat printer. Canvases are a large part of my business and we do a lot each week. Having tried and tested several "as you do" to get the one you are happy with this is the one I have decided to stick with. I printed one 4 years ago which is still on display in the window, i'm not that lazy that I can't be bothered to refresh my window

but this one item is an example of the longevity of our prints. Other products are faded within 2 weeks so I think it's pretty good stuff.
Where the name frog juice came from I wonder??
There are many products out there for canvases, I personally don't like the roll on stuff even though my method works out much more expensive.