sanding sponge block consists of three components: foam, usually made from EVA (ethylene vinyl acetate), PU (polyurethane) or recycled PU waste, a binder resin and abrasive grit made of aluminum oxide, white aluminum oxide, silicon carbide, semi-friable aluminum oxide and so on.

The Advantages of foam abrasives

When sanding with foam abrasives, the focus is not only on removing as much material as possible. It is vital to achieving an absolutely smooth and even result when preparing surfaces for subsequent painting or varnishing.