got a little tired of brand new Weaver , Buckingham and other throwbags bursting open during the throw, or on landing. Up here a throwbag starts at about $20 CDN and goes up from there, to around, yes not kidding here, $45 for a cordura one. >

so needless to say i get a little angry when they burst. Have had to replace 7 now, and the stores refuse to warranty them.
so i reached into my chemical cabinet
(filled with Acetone, Xylene, turpentine, carb cleaner, engine parts dip, exotic epoxies, fiberglass stuff, etc, all the usual stuff found in the shop....) and pulled out the trusty tube of GOOP!
after restitching by hand my Weaver throwbag, i smeared about 4 tablespoons of GOOP all over the seams, and the entire bag. Let it dry - now its armour coated! It handles hitting the hard ground at speed 100% better, and the stitching does'nt abrade fall apart after one throw, nor does the bag absorb water anymore.