I don't know but we are now producing a better version that is actually has UV protection so you can use it outside. We have it for sale on Haunted House Supplies .com but we are not marketing it yet until after the Halloween season. If anyone wants our blood let me know... we are also making a puke paint and a slime paint all doing the same thing leaving a shinning finish even when dry.
Our blood paint will be much cheaper than what everyone else is selling as far as I know. There are several companies selling blood paint including FX Warehouse they in fact where the first company to sell it. Either way let me know if you need some and we'll whip it up for ya!
We have it listed on our site at $75.00 per gallon but it might end up being a bit more but I'm not positive. Either way you can order it on our site and we'll send it to you for that price... until we have it figured out what exactly we are going to sell it for!