3M-01549 is available in grade 80 only, 8 inch disc, green in color with a heavy D weight paper backing. A more durable longer lasting product designed to be used down to bare metal. Discs have a pressure-sensitive adhesive for easy application and removal.
3M-01556, 3M-01550, 3M-01551 and 3M-01552 are available in grades 60E thru 24E, 8 inch discs, green in color with a heavy E weight paper backing. Individually linered, pressure-sensitive adhesive backed discs with a tough mineral designed to go down to bare metal.
An all mineral/bond construction and tough D or E weight backing provides for a fast cutting, long lasting abrasive disc. Excellent for coarse sanding of hull and deck areas.
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Simply the best sand paper made
I've used the green core disks in most grits for fairing wood boat hulls. The product cuts aggressively and lasts quite a while. Expensive but worth the extra money over cheaper Brands.
be careful when using
i used it to rough fair fiberglass hull. great for hard fillers, removes material fast. one has to be careful with technique, or disk flies off pad.