I absolutely recommend this brand. The Amazon reviews are very critical, and most likely from non-professionals. I usually buy the stuff from Talas, a professional conservation/book keeping/book binding site. They're out of the smaller size, however.

Also do note that despite the one star review the cranky lady on Amazon gave, a little goes a long way. That pump bottle creates a VERY fine mist and, unlike I imagine the Krylon stuff does, leaves no residue. But if you're not looking to spend a lot of money, you might try that out.