S-125 – This super strong peroxide will aid in the removal of those nasty oils and material from those skulls you are trying to bleach out. Peroxide, along with mag-carb, mixed into a paste and applied to a clean moist skull and allowed to dry, will give you a whiter bone. Instructions are available upon request and FREE! 30% concentrate. Twice the strength as most available. *FedEx hazard fee not included in price.