What I currently have is Tailor's Quilt Basting Spray, which I probably bought at Hobby Lobby. It says it works with cotton or polyester batting, and to spray on batting. Amazingly, it does not have any information as to whether it washes out or not! It says it's manufactured in France.
It seems irresponsible not to say whether or not it washes out so not sure I'll buy it again. I'll consult the website and see if more information is available there.
I do love the convenience of spray basting but I worry about the fumes.....and the fallout or over spray on furniture and floor annoys me. If I could do this outside or in a huge well ventilated space, I would, but I don't have that luxury......or equipment. I've used Elmer's straight out of the bottle but don't like the trails and clumps of glue. I may try another method of applying it. Darn, but these aerosol cans of glue are so much easier!