Just wondering if spray basting will hold the entire time untill it is done being quilted without letting loose?

I did a baby quilt and it let loose - maybe I did not use enough.

I have never had a spray-basted quilt come loose, and some of them were stored for years. Very occasionally an edge might come loose, but it has always been easy for me to re-stick it down. On large quilts I add a few safety pins around the edges just to keep them together.

Just so you know sulky is very temporary and has to be kept in an air tight container to last so is not the best choice if you don't plan to quilt it right away. its better for like applique than basting quilts. This is from a sulky seminar I went to. The other ones can last months to years unquilted