Tackle tough clean-up and maintenance jobs with Suma's broad range of professional strength cleaning products, perfect for the home or workplace. Suma Block Whitener is a thick, high-alkaline, non-corrosive liquid formula that provides superior cleaning and whitening of cutting boards and other plastic surfaces. Its powerful liquid formula begins to work immediately upon application to whiten and brighten cutting boards in as little as 15 minutes. The thick liquid formula spreads easily over rough surfaces and allows for even applications. To use, simply apply directly to the surface and brush for deep cleaning. This package contains four one-gallon bottles of Suma Block Whitener.