Acorn Precision Piecing Seam Align Glue 1 oz AP10062 Never pin again! This excellent formula, designed by professional quilters Shelley and Bernie Tobisch, is ideal for quilting, appliquè and sewing. It is water soluble and sets quickly with an iron. It makes it easy to create super-straight lines and precise seams, making it an excellent choice for plaids and stripes. Gentle Hold. Water Soluble Fabric Safe Quickly sets with an iron. Great for matching plaids and stripes! Precise applicator. 1 oz.