I used it to make inside chine joints for a boat using construction adhesive. Worked great for that. Don't know if that will help you or not.
This product is only offered in 4" wide rolls. There are other products of similar composition available in wider widths, however, you'll want to ensure that they are not impregnated with any sort of chemical or asphalt-like product that would conflict with the material you are using with it.
This product is used in conjunction with Lanco RC230 Siliconizer Crack Filler for the repair of cracks, seams, and other penetrations - generally on roof surfaces.
The fiberglass patching weave can be used in conjunction with spackle, drywall mud, and RC230 Siliconizer Crack Filler. It is not self-adhesive.