Tight'N'Up Canvas Re-Tensioner - Tight'N'Up fixes most canvas tension problems. When applied to the back of a painting, it causes the canvas to shrink. Binder agents seep into the fabric''s threads and lock them in place, thereby giving the canvas extra support needed to retain canvas tension. When it dries, tension is safely restored.
Spray Tight'N'Up on the back of a painted or unpainted stretched canvas. The tension will increase immediately.