Additionally I have heard that Thompson's Water Seal works. Haven't tried it myself though.

I have just about given up on the idea of matches in a kit. The reason is the number of lights per volume. The small fire spikes are about the size of 3 maybe 4 matches. The ones I'm talking about are the "flint" rod like a Swedish fire steel wrapped about 3/4 around by magnesium. They give you 50 or so lights. The bigger Doan modles give a hundred or so for the volume of 7 or 8 matches. For 20 or so matches either a mini Bic or a full size butane lighter that gives you hundreds if not thousands of lights. not counting the extra space of the match container.

No contest.

All of these other methods have little or no moisture problems.