Norton Pro Plus is an anti-clogging sanding disc designed for the most demanding sanding applications on primed and painted parts, marine gel coat, non-ferrous metals, composites and ceramic coatings. Combining SG and premium heat - treated aluminium oxide grains, Norton pro Plus provides a good wear resistance, lasting up to 2 times longer than conventional designs, making it the most aggressive and coolest cut to date. The waterbased stearate No - Fil coating provides maximum load resistance, extends life and can be used for both dry or wet sanding. There is also 50-60% better tear resistance and flexibility with the fibre reinforced B-weight latex paper. Due to the coloured backing technology, no pigment is used in the bond or No - Fil coating, eliminating any colour contamination or transfer when using the product.