"EZ AIR ALL-PURPOSEBRUSHCLEANER" is soy based. It is a powerful alternative to D-limonene based cleaners. The soy based brush cleaner is a non- toxic solvent that is highly effective and leaves brushes naturally conditioned. It is designed for cleaning brushes, tools, and work areas. Artist Ori Ornstein says: "I use the ALLPURPOSEBRUSHCLEANER, because I'm sensitive to the 0- limonene based cleaners. This product is amazing. I don't even use soap after I clean my oil brushes. The soy in the cleaner keeps them naturally conditioned even months later. I am truly amazed."