Review on 🧽 3M Medium Sanding Sponge 3 x 3 Inches by Paul Andrews

No longer suitable for wet grinding. I have used this product for wet grinding for the past 10 years. I've been using them for years because they haven't worn out. About 3 years ago they changed the materials and the way they are made. Now they fall apart after 3 hours of use. The putty begins to fall off after an hour of use and the corners are soon without foam. It took me a few years to admit that 3M sucks. If you are looking for a wet abrasive pad, Norton Abrasives has a large abrasive pad that reminds me of a quality product formerly made by 3M. Both sides of the Norton sponge have the same grit.