Yep, great stuff.....I've been using "permanone" for ticks since the late '80's.
I haven't found anything better since I first found out about Permanone from a forester friend of mine over 20 years ago. It also does a good job on "skeeters & chiggers". One application to your clothes will last all day & more. As you said, be careful to follow the directions..........you don't want to get it on your bare skin.
I have some of this stuff under a different brand name. I don't often use it, I will backpack it around and I save it for special tick occasions. Like you're in the woods for 5 minutes and you've already picked 3 of them off you kind of occasion.
I should get some of this stuff. I know a wooded sandbar at the opening of a back water on the Saco River where in mid-June the Smallmouths gather. Some are huge. It's a perfect spot to camp out and once the sun sets the Perch run like crazy. The problem is you can't sit down for a minute without a tick climbing on you. And the Saco is a hotbed of Lymes.... that's where I got in 2003.
Armed with this stuff I might be able to actually stay the night and bring back a pile of fish.