Truth Website will now finish their collection of PrimaX Testo "Discover what's hiding in your lavatory" explanation of Propylene Glycol (PG). PG at the side of Butylene Glycol (BG), Polyethylene Glycol (PEG), and Ethylene Glycol (EG) are petroleum derivatives that act as solvents, surfactants, and placing sellers. They can easily penetrate the skin, and may weaken protein and .