yeah, my red came in a blue bottle, and blue in a red...
blue is medium (there's a green that's not as strong)
red is high heat, harder to get off (after a few days of sitting at work, still easy to get off with a 3/8" ratchet using new bolts into a new engine block)
green is sleeve retainer, it's pretty strong, if you want something press fit and it not to move, use this stuff!
then there's the white thread sealant stuff, that stuff is a good loctite, if you leave it set for a few days, you'll need to heat it to get it loose...