Sew 'N Heat Thermal Backing - 19.5" x 25 Yard Roll. Sew 'N Heat is a clear stabilizer used either as a backing or topping. It is useful as a topping for water-sensitive fabrics such as silk and wool. Ideal for a backing for sheer materials without stabilizer show-through. Tear away excess stabilizer from finished embroidery, the remainder dissolves using a stainless steel iron on a low to medium setting.