Appli-Glue by Jillilly Studio is acid-free, PH neutral, water soluble and water reversible. With Jillily Studio Appli-Glue, there is no need to pin or stitch to baste your appliques in place. The tapered anti-clog precision tip allows you put a tiny drop in the seam allowance of your prepared applique piece. The tip is made of nylon, so it does not rust and can twist off to clean if needed.