do you want a stablizer (a thin fabric that adds weight/body to a piece) or a fusable web which you fuse to the back of one fabric- then place & fuse down to hold while stitching? if that is what you mean- which i think is- there are a number of them on the market- there is wonder-under, steam a seam lite, heat & bond lite- and numerous (off brands) they are paper backed- so you can draw your shapes on the paper- fuse to the fabric- cut out- remove paper-then fuse down to the background-they all wash away unless you get the heavy/stiff- no sew varieties-
there are wash away stablizers that embroiderers use- they tend to be a bit different- they only fuse to one side- and they are much more expensive-