Say goodbye to warping seams with Prym’s iron-on seam tape – the perfect solution for stabilising armholes, necklines, shoulder seams, and buttonholes. This 10mm-wide, 10m-long tape is easy to apply with a quick press of the iron, reinforcing your fabric for smooth feeding under the sewing machine. Made from a 50/50 blend of viscose and cellulose, it’s washable up to 40°C and suitable for tumble drying and ironing, giving your projects long-lasting structure and support.