Prym Stainless Steel Quilt pins with flower head Fray stop is a colourless liquid that prevents stressed areas; such as seams, collars, cuffs and button holes; from fraying by reinforcing the fibres. Fray Check can be applied to the edge of the curves, which are then conveniently cut before turning and without fraying. This sealing solution gives rolled seams a stable finish. It can even be use to provide a fray-free seal to the edges of self-cut fabric motifs. Only after multiple washes can the effect of the fibre-reinforcing liquid can lightly subside. This treatment can be repeated as often as desired. Ideal for Applique and Embroidery. Made in Germany