SB 2380 CSR Gel is a thickened blend of organic and inorganic chemicals with a strong ammonia odor. It is designed to dissolve and lift the green stains that result from copper, bronze and brass corrosion. These stains are usually found on exterior concrete, unpolished marble and limestone surfaces. The SB 2380 acts as a stand- alone cleaner and takes the place of both the cleaner and poultice in traditional cleaning methods. The viscosity of the product holds the dissolved copper in place to keep it from sprea