If you launder the finished quilt it would all wash away and probably be fine-- no idea how well it would actually hold/ baste the quilt sandwich. If going to try it I would put together something small ( table runner, placemats maybe) & try it, going through whole process, quilt, bind and launder before I would try it on a whole quilt.bi wonder if it would gum up your needle. I think any spray basted quilt should be laundered when finished ( my opinion) to wash away the adhesive. I personally launder each and every quilt as soon as the binding in done-- it's the last step to a completed quilt.