heat & bond lite washes away- the stiffness goes away once your project is laundered- the no sew heat n bond does not get soft- it stays stiff but heat n bond lite and steam a seam lite both soften right up- also wonder under from pellon is another (one thats been around a long long time) is another sew -able- fusable that softens up - washes away once the project is stitched and laundered. i do alot of fusable applique & use heat n bond lite most of the time-
also- there is a difference between fusable for raw edge applique & stablizer- stablizers do not (stick) 2 pieces of fabric together- they only adhere to one piece-adding stability- those come in stay in (a light layer of fabric) tear away and wash away varieties- but are used more for embroidery and other sewing applications