1 part ATV tire sealant, 1 part liquid latex (available at Hollywood North, get the freshest available), and 3 parts RV antifreeze (biodegradeable, different than regular antifreeze). This is my go-to homebrew.
Works out much cheaper than Stans, particularly if you are a tire freak like Clark, or like changing up for different conditions. In my experience it has superior sealing capabilities. You do get "boogers" occasionally inside the tires where clots break off and tumble around, but that's a minor quibble. I have a prize booger that's about the size of an apricot. Might try to sell it on Ebay (: The mix seems to last just fine- I had tires stay sealed through 8 months of use. When it does dry up, it seems to leave a stickier residue that provides a longer-lasting seal on the bead than Stans does.
Don't add glitter- crap doesn't help at all. This recipe is tried and true. However, if in extremely dry and hot or extremely cold, it may be worth doing some chem research on how to modify. For the northwest, it's all good.