3M™ Scotch-Weld™ Surface Insensitive Adhesives bond rough, porous, contaminated, and acidic substrates including wood, cardboard, veneer, fabric, cork, and leather. SI5 (formerly SB20) is a very low viscosity, wicking grade surface insensitive cyanoacrylate for bonding a wide variety of substrates including wood, paper, cardboard, leather, and fabric. It has been tested and passed the requirements of Commercial Item Description A-A-3097, Type II, Class 1 (formerly MIL-A-46050C).Information provided by 3M |