200mL High Quality PET Empty White Plastic Trigger Pressure Pump Spray Bottle Leak Proof Flip Flop Handle Fine Mist Liquid Container Dispenser with ON/OFF Button

To tighten a loose or dented canvas, grab a spray bottle with water. Gently mist the back of the canvas, ensuring you reach all corners. For extra reinforcement, lightly spray the corners on the front too. Let the canvas dry naturally, and as it does, the fibers will contract, tightening up the surface.