I just used the bottle the glue came in. I didn't have to apply much pressure. I just opened the tip, held the bottle upside down and wiggled. It's the saying a little goes a long way. If it helps you get an idea how much to use, for a twin quilt, I used 1 bottle for the quilt top, and quilt backing both. Glued the quilt back on one day and a day later, glued the quilt top. No stress and very little mess.