It's not for cleaning skulls
If you are trying to use this product in the final step of maceration, DON"T!  I thought it was just heavier hydro perox, it's not. It's got other ingredients in it which will thin out the bones and wear off the tooth enamel like you-you soaked it in coca cola overnight. Get the cheap stuff, it'll work better for this phase of the process.
Rating: 2 stars