Loxley Gumstick Handy Artist Gummed Tape is a very useful water-activated adhesive kraft tape that's perfect for paper-stretching, picture-framing and many other uses.
You'll find it easy to tear or cut, and it's not sticky until you apply water, which saves you getting in a mess.
Once you add water, you have a bit of time to play about with positioning.
When it dries, it creates a long-lasting bond but can be removed by adding water.
This 48mm version is the widest variety, providing plenty of width for covering the edge of frame backs or for applying down long edges, the 200 metre roll should keep you going for a good while.