Some are ammonia based, others are not; synthetic latex, natural latex, no latex, you name it they got it. Mixing may work, give a water/oil result, or instant hardening, or dissolve your tyre, or cause total protonic reversal.
Completely unrelated, but based on very recent experience: anchovies (worms, whatever you call them) have limited shelf live. They get less flexible and won't peel off the plastic anymore. Also: don't try to make the hole of the tool to push the worm through any larger, not even gently. The result will only be useful to skewer olives (the tasty kind).