Poison Ivy, Sumac, and Oak.
As one who has become increasingly sensitized every time I get into the
stuff (particularly ivy), I can report that Fels Naptha or Octagon don't
work for me, unless I utilize them within the first 15 minutes of
exposure. After that, it is too late.
Ivy Block works for me, for poison ivy, and I used some when I was working
in poision oak (and either it worked, o I was careful enough to avoid
contact).
Strong soaps only work for those of you who have mild cases and mild
allegies. Those of us who swell up and ooze all over, strong soaps don't
cut it.
dave browman