The sponge abrasive blocks are made of Sponges / or EVA coated with the abrasive of Aluminium oxide / black siliconcarbide or white alundum . they are the best replacement of waterproof abraisve papaer and dry abrasive paper ,with the advantage of water absorption ,they can be utilized manually in dry way and wet way .
The sponge abrasive blocks can be used widely in vehicle industry , furnitire industry , car garage & household etc to polish the rusts , burrs of the metal / palstic / woodware .