Banish wrinkles, sags and ripples forever with Tight'N'Up Liquid Canvas Retensioner. Simply spray a small amount of the solution on the back of your stretched canvas to instantly and safely tighten pre-stretched canvases and paintings that have since slackened. Use either before or after painting. Canvas Retensioner be applied under the stretcher bars with a brush.
Once applied, Tight'N'Up soaks into the canvas' threads and fibers, causing them to swell and contract and the canvas to tighten. As the water evaporates, the binder agents remain in the fabric material, and lock the fabric into a contracted state, restoring canvas tension and leaving the surface flat and tight.
Tight'N'Up will not harm the canvas, acrylic gesso or acrylic and oil paintings. Works on natural-fiber canvases, such as cotton or linen. Acid-Free and archival. Tight'N'Up dries clear.