Your LSS should carry it, but Michael's and AC Moore carries it as well. It's pricey (around $40)...so I usually get a Michael's or AC coupon and then go get it...saves a lot.
I just completed an album for my husband of all his high school sports clippings. 4 years worth of newspapers to spray. Not the most fun album to put together, but now that's it's done, I couldn't be happier.
It comes in a pump spray bottle. You pump up the bottle then spray. I spray both sides. I had one bottle that jammed on me and I just took it back to my LSS and they exchanged it for me.
When you spray it on, you won't really see a difference...it doesn't make the paper look wet or anything...so don't think you're not getting it where it should go. I just try to go in a back and forth motion from top to bottom just to make sure I get the whole thing.