Finally found it:

Stitch Witchery® by Dritz®









Item Number: 227
Barcode Number: 072879115840

Instructions:
To fuse-baste seams: Always test before using. Press one seam allowance under 5/8". Pin strip of Stitch Witchery on seam allowance, close to fold. Hold steam iron over Stitch Witchery (with-out touching it) until it becomes tacky and sticks to the fabric. Place this seam allowance over unpressed one. Cover with damp press cloth. Set steam iron on "wool" and press for 10 seconds. Allow to cool. Turn fabric to wrong side and stitch seam along fold. Washable and dry-cleanable.




Sherry