I can remember years ago. my friend and I were on a hiking trip into a remote lake. he forgot about the bear spray canister in his pack. then about halfway into the area. he said his back was getting hot. really warm . he suddenly took that pack off looked inside carefully. the seal on that bear canister actually leaked. all the items in that pack were covered with the spray.I agree with what 45acp says . the only bear spray I trust is the leaded kind.