Magic Monkey is a real stand out product with excellent performance attributes. It is made from the highest quality expanded Perlite, which results in it out-performing all other granules that we have seen by a comfortable margin. Only a demonstration reveals how it removes the very last bit of oil residue from the floor. Although it is more expensive when compared directly to clay, it can be cheaper because less is used to clean up a spill. Please note Magic Monkey is not suitable for using on hydrofluoric acid spills.