Locals, Sal Taibi and John Morrill, were fans of Super Seam. Nitrate based aircraft fabric cement. It's been awhile, formulations may have changed and there are a couple more choices. I like it, but I use it mainly for patching tissue tears. Check it out at: Cement from Aircraft Spruce http://www.aircraftspruce.com/categories/building_materials/bm/menus/cm/cement.html