I haven't had any problems when I spray baste (505) a sandwich then leave it for a month or two before quilting.

I recently used 505 on a quilt and it waited for several weeks before I had time to quilt it. I had no problems at all. Cotton fabric, Warm and Natural batting.

I use a lot of polyester batting and some warm & white. I always use large size safety pins. Never used any spray baste of any kind. I have a pet bird and my house is small. Chemicals would not be good for any of us.

I use the June Tailor Basting Spray from Amazon.com and it works great!! I spray one day, let it dry over night, then I can start quilting. I tend to quilt them right away the next day, but when quilting a king size, it took me three weeks to get it quilted and all was still stuck except around the very outside edges.

My experience w/spray basting has been mostly good. I have always used cotton batting and Dritz (June Taylor too) basting spray form WM. I did use it w/poly batting once and it would not hold. I decided recently to try the 505 spray and it does not seem to hold as long or as tightly as the Dritz. I will be using some poly batting on two Christmas quilts so it will be interesting to see how the 505 does w/those.

I always iron my quilt after spray basting to help secure it. I learned that from a class I took on craftsy. It works well for me.

I've used Dritz and June Taylor - no problem. I do the Sharon Schamber method with two 2x4 boards. Then once the batting is spread nicely on the back I spray the batting then roll the top over it, spread out any wrinkles then I lay my quilt books over the top to help adhere the spray and wait for a couple of hours then I pin and when that's done I move the quilt to the next spot and repeat. I found this works very nicely. I believe I only had 2 ( almost positive on this) spots on the back of the quilt where there was about a 1-2 thread pucker. I would have had to drawn an arrow to point it out so I left it alone. Looks just fine!!!!! (nobody belongs back there anyway - LOL!!!) Oh, I also made sure to quilt it within 3-4 days...I didn't want to take a chance on the glue dissipating...I think some will.)

I don't use 505 cause I think it is not sticky enough. Just my opinion.

Yes I have and I have not used spray since!!! Now I Pin baste all my quilts and they can sit for months and then when I'm ready to quilt, so are they.

I use 505 on all the ones I quilt. I can't stand long enough to pin them and hate hand work, so no basting for me. I have sprayed several quilts at a retreat and brought them home, left them in the car for several days, they sat around for 4 months while I procrastinated. When I was ready to quilt them, the very edges needed to be held down, otherwise all was well. Perhaps you sprayed the back, applied the batting and then sprayed the batting to apply the top? I usually spread out the top (right side up), spray and apply the batting/backing to the top. I never spray the batting, as it gets absorbed quickly and wastes too much. Just mho.