This white, 6-ounce sailcloth is made of a medium weight, high-quality woven polyester with a UV stable (non-yellowing) pressure-sensitive adhesive backing. Dacron^® polyester sailcloth with an adhesive back is perfect for spreader patches or sail repair, as it’s a convenient option that is heavier than your basic sail repair tape. You can easily peel and stick this material wherever it's needed, but we recommend sewing to ensure longevity. The grid on the paper backing aids in patterning for ease of use. This product is also suitable for reinforcing grommets and fasteners.