Do you mean : Scent Killer ? (as in human scent ?)

It falls under the heading : "A fool and his money are soon parted"

Don't waste your time. Keep your operation clean, within reason and learn to put in a set fairly quick, so that you get in and out without a lot of extra tramping around. Too many animals are caught without using products that 'claim' to remove your scent.

At one time,I was plant manager for Scent Shield.Which was the first scent killer on the market. Bow hunters were the #1 customers.
Never did try it for trapping.
Tom

Gee I wonder if criminals ever used it to evade police dogs?
Not likely...but wouldn't that be a good test? I've never seen that I one of the commercials for it.
Hey if it gives you confidence in your set, go for it. I bet a cover up like good misting of fox pee plus that pee as attractant would go farther toward success.
Jim

How did the old timers ever catch anything without all these gismos. The extent of my scent control is leather gloves..... Overthinking everything will screw you up. Set on sign, bed your trap tight and move on.

I set with bare hands. Most of the scent left will be from your body. Just get in, set and get out as quickly as possible and you will have little problem. Coyotes are generally quite familiar with human scent and will know that you were there; you just don't want to leave a bunch at the set.

Wolfy and thereafter the buck became suspicious of all his does. Checking them for human scent, asking them where they were all night, going through their purses and cell phones. Oh the mistrust that a little doe in heat cover scent must have caused in that deer herd.
First time the buck caught a doe licking a candy wrapper I bet he came unglued on her. Called her a bait corn lover or something like that. Getting her dinner at the humans deer feeder instead of foraging and browsing in the woods like a respectable doe. Sheesh, some does....

Boco
“As far as trapping predators goes, scent control is all about keeping things natural.In other words keep all smells in their place.One obvious example-no bait scent on traps\snares,to draw the animals attention.
The smell of human is just another animal smell to the predators.If they connect your smell with a free meal,they wont be spooked by your scent,quite the contrary.”

Lots of information in this statement that can make your life on the line easier if you take it it.



“As another member mentioned. While deer hunting I have on several occasions seen fox, coyote and bear moving along through the woods or in a field and when they crossed my path they had a very negative response. From jumping about a foot in the air to turning around and running like they were shot out of a cannon. I was moose hunting with a friend and when the moose cut our trail he put his nose to the ground and pulled his ears back and got very nervous so to generally say "sent dont bother critters" is not the case everywhere.”

I would never say that human scent will not cause an adverse initial effect on any critter. I do not doubt the stores like the one above of animals showing a negative reaction to hitting a human's trail.

I also would suspect that an animal, say a canine, in rural Maine might behave a bit differently to human scent than say the same type of critter in a heavy agriculture area in Pa., Indiana, Illinois etc.

But there are a couple things to consider.
As Boco explained, animals can become almost excited to hit your scent if they associate it with a free meal.
It is doubtful you can ever make a set for a critter and not leave human scent. The most logical thing to do is be basically clean in that keep traps free from lure and bait odors, get in and get out. You are making a set, not building a piano.

Back when I had a lot of free time and gas was cheap I did a lot of pre-baiting. Often handled bait with bare hands, on purpose.