IOSSO Products is offering invisible seam protection, Iosso Seam Sealer, which will protect from leaking without changing the look of the fabric. Provides invisible seam protection from water, soil and oil and is recommended for use on awnings, canopies, tents, tarps, umbrellas, boat covers, campers, camping gear, and boots. Best for use on cotton, cotton blends, polyester and synthetic woven fabrics, its water repellency will vary with vinyl-coated and vinyl-laminated fabrics due to seam construction. It will not cause yellowing, or change the color or feel of the fabric. Available in a 4-ounce applicator bottle and in larger professional sizes.