Waterproof Carhartt?

Sno Seal is only really meant to work on leather, not cotton unfortunately. Cotton isn't waterproof at all and it's difficult to make it waterproof. I have the quilted Carhartt pants (non-overall version of what I believe you got) and they are water resistant, i.e. they will keep water at bay for a while, but eventually you'll get wet. It's sort of the nature of the type of garment.

Filson makes jackets that are cotton but are washed with oils and finished with wax and are quite waterproof. Here is the one that I have had for 7 years:
http://www.filson.com/products/tin-cloth-field-jacket-extra-long.10228.html?fromCat=true&fvalsProduct=mens/coats-jackets&fmetaProduct=1011
It's quite waterproof.

They do sell the wax in a tin that you could try to rub onto your overalls to increase water resistance. I have not done this to my pants though so I can't comment on whether it works. But it's a suggestion and I've definitely thought about doing it myself. It smells like crayons.
Wax:
http://www.filson.com/products/filson-s-oil-finish-wax.69033.html

Hope that helped.

thanks a bunch, I know the snow seal probably wouldn't work and it would be a pain to do all of coveralls with...I think I'm gonna try some spray on stuff, I do want to try and ski in these...and I work outside in the snow in them

I use mine for saw work outside all the time. Good stuff. Haven't really skied in them though. They don't fit over my boots too well.

sweet, ya I love Carhartt b BTW nice truck...I have a '89 SR5 with a lift and 33's definitely not as nice but still like it a lot

Thanks man. Gotta love the Toyotas!