Dr. T¿s DT363 Snake-A-Way Snake Repelling Granules 1.75 ...

• Contains naphthalene (7%) and sulfur (28%)
• Repels poisonous and non-poisonous snakes
• 91% repellent rate of garter snakes and rattlesnakes
• Only EPA-registered granular snake repellent on the market
• 1.75 lb. size

Better off buying magic fairy dust:
As a Herpetologist myself let me take this opportunity to rip this products add a part bit by bit: Snake-A-Way is the world's only EPA registered: Anything can be submitted for EPA Registration, that doesn't mean it works!!! University tested: Notice they don't say which university tested it, and what the results were. Just because it was tested does not mean it did well in the tests, they just want you to assume that. Patented snake repellent Are snakes scarred of Pattents? No, then why does that matter? It has been proven effective against both poisonous and non-poisonous snakes. What Proof? When used and applied as directed, it is environmentally friendly to humans, animals and plant life. Probly because it is just a junk mix of herbs and minerals. It has been universally approved and endorsed by naturalists, conservationists and ecologists. Universally? Again who is endorsing this. Anyone can call themselves a naturalist, ecologist, or consercationist. These are not proffesional titles like Doctor or lawyer but self proclaimed philosophies on a given matter. Anyone can call themselves on of these titles even this companies PR person. THE BOTTOM LINE Don't want snakes around, get an outdoor cat. The cat will eat the snakes food source so it will go packing in search of alternate feeding grounds. This junk is nothing more than an over priced ugly paper wieght.

NO snakes with snake-away:
It's not scientific, only anecdotal, but I used Snake-away around my small cabin for seven years and never had a snake. I thought maybe the rattlers in the fields around us just didn't like the disturbed soil and human smells and that's why I never had any at the cabin, so spring of year eight, I didn't apply snake-away. The next time we came to the cabin, a large rattler greeted us at the front door. I went back to applying snake-away. Five years later, with spring and fall applications, no signs of snakes at the cabin. I use it religiously!

It smells awful:
I put it around the outside perimeter of the house. Upon returning home that day the whole house inside smelled like moth balls. I switched to Snake Stopper and it works just as well.

Overrun with rattlesnakes:
Snake Master Mike's review is discouraging because we are overrun with rattlers here in the hills of Northern California. There are dens all over our property sounding off with continuous hissing all day. Fish and game won't do anything, Home Depot has nothing for sale for this, and we aren't going to hire a backhoe or dozer like the enviros say to do. This is the worst year ever and our six cats are working overtime without success. It will cool off this month, but we need to get a solution next spring before the hot season starts. There ought to be a poison that will just kill them off. No such product seems to exist.

Pretty sure it doesn't work.:
Tried using this for the past year and thought it worked until the last 3 weeks. We have a racer (I'm OK with it...my wife on the other hand...!) in our yard that I don't want to kill. I saw it in the yard and I walked out with the Snake-A-Way and tried to sprinkle it behind the snake trying to chase it out of the yard. I think I bothered it more than the crushed moth-balls! It finally curled up in a hole by a fence so I sprinkled the stuff around leaving a swath open where the snake could escape...I also put some DIRECTLY ON the snake, but it just sat there. One week later, snake was back sunning itself ON the area I'd sprinkled previous (supposed to last 3 months)! Had to chase it out again with a rake! Will have to start looking for some other repellent!