That particular nylon product does not look too compatible with heat which leaves air-dry. The go-to for odd(for us) substrate ink requirements has always been NazDar
That's what we use here, as well, and we've had solid success with it printing on flasks, skateboards, poly mailers, stickers, magnets, metal signs, and backpacks -- basically anything that we can't send down the dryer for one reason or another.
