Other ways of waterproofing the contents would be just to use a ziplock bag, put the kit inside and fold the ziplock to the contours of the tin and tape it down.<br>Or if you have a larger kit, put all the contents in the zip lock and just hold the tin together with ranger bands. Its the contents that need to be waterproofed, not the tin.<br><br>Anyway, I did try using a vacuum sealer to seal my tin, but with the everyday carry in my pocket, the pack soon developed tears. I went back to using tape <br><br><br>