Try cutting some corugated carboard to fit, then taping it on both the insides and the outsides. <br><br>If it is non-pocket PSK (briefcase, etc), or you wrap it in a ziploc bag, try soaking the pieces in canning wax, then dusting it with magnesium or aluminum shavings if you want. Good tinder, so long as your maner of carry doesn't expose it to heat (then it get's messy). If you need heat protection, just soaking it in shellac and letting that dry will work almost as well. <br><br>Either way, you just improved it's weather resistance a little, added (mostly) dry tinder sufficent for a couple fires, and if you make it as a box you have a second container for things like tinder or to hold the contents of the kit if you *smirks* are cooking in it.<br><br>you could also cut the sides a with "ears" to hold the 550 line a little better.