The only adhesive spray I will use now is 505. Seems as if other brands of spray may not adhere well to polyester, but have never seen a post about 505 not working with polyester batting.
When using spray, be sure to follow the recommendation to layer your fabric on the batting first, then fold back half of the fabric and spray half first. If you spray the whole thing first and then try to layer, let's just say it's no fun.