FIN CLEAN 7 CONCENTRATE is a highly concentrated alkaline liquid that is formulated to be used in a 2-gallon bleach safe sprayer. It removes dirt deposits, dust, textile fibers, paint, calcification, scale, mildew, fungi, hair, oils, and many other organic and inorganic deposits from coils and radiators. It is safe to use on coil constructed of steel, aluminium, and other soft metal alloys. However, it does not perform as well on copper coils.