12-grit is the coarsest grit we carry, but it is only available for the edger. Why? Because It takes so much glue to hold the massive adhesive particles to the backing that it becomes brittle, so it can’t be made into a curved belt without cracking the glue sheet and breaking off all the grit pieces. But in flat, disc form, the grit pieces stay in place, so they can remove large quantities of unwanted, old gunk from floor surfaces, especially smaller areas like stairs and closets. We send a lot of 12-grit out on jobs with old, painted porches.
12-grit as a prescription-only, pre-sanding, bad-axe. Its job to help you remove adhesives, glue, or multiple paint layers from floors. Think of it more as a virtual scraper or stripper for floors. But don’t be confused – this is not a one-step magic potion for those bad floors: it is the FIRST step. 12-grit should never be used to sand wood to bare. Use it to remove up to 2/3 of your gunky business – it will prevent your later, finer grits from gunking up so quickly that you would have to replace them every foot. INSIDER TIP: if you are edging with any grit that is completely glazing over every 1-3 feet, you are using too fine a grit.
Allow one disc for every 10-20 linear feet of wall to be edged (assuming you are edging 10” out from the wall) or one for every three stair treads or one per closet.
Mineral: silicon carbide
Bolt-on style disc with 7/8” center hole