I sandwiched a quilt just yesterday using Elmer's school glue. I clamped the backing to my 30 X 72 table. I laid the batting on top and checked to be sure it fit as planned (no surprises at the end). I re-rolled the batting and started laying down dots of glue and unrolled the batting as I went. I turned the piece over and laid dots of glue on the batting side and pressed the quilt top on in smoothing with my hands. By putting the top on last I could be sure that it was straight and had straight lines and square corners on the blocks. I thinned the glue with 25% water so it would come out of the bottle easier. The process took about an hour. I let mine air dry on the table while I did other things in preparation for the quilting. I have done my quilt sandwiches this way several times. Those heavy, cumbersome safety pins have joined the relics bin for me! It washes out completely.