Duct tape and Gorilla tape can be used to hold wounds closed.
There is a kind of liquid soap called Hibaclens that contains chlorhexidine gluconate, and it can be used to wash skin, wounds, rashes, and so forth. It is available at Walmart (and everywhere else).
See below:
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If it's used properly, bacteria will not grow or multiply on the skin for 6 to 8 hours after it's used, as it leaves an antimicrobial residue on the skin.
Keep in mind that just because it kills germs doesn't mean that it kills anything else. I knew someone who tried to use it to kill head lice, and it didn't work . . . although there are theoretical reasons why I imagine that it may prevent the diseases transmitted by lice.
This is because body lice (head lice and pubic lice are not known to spread disease) excrete organisims--like those that cause typhus--in their feces, and people get sick when they scratch louse bites and rub the feces into the spot where they were bitten . . . as this is where the skin is broken.
So, it seems to me that a disinfectant soap with residual action would kill the organisms in the louse feces so that the person wouldn't get sick.
I don't know this for a fact, but this idea seems logical.