This is a half ounce bottle of Bob Smith Industries IC-2000? Rubber-Toughened CA Glue. IC-2000? is a rubber-toughened cyanoacrylate that forms superior shock resistant bonds on non-porous surfaces. The black colored CA has added flexibility for the bonding of metals, fiberglass, rubber, carbon-fiber and other advanced materials. For model use, IC-2000? is ideal for the bonding of bulkheads, formers and servo rails to the inside of fiberglass hulls and fuselages. Setup time is 20-40 seconds, which can be accelerated with INSTA-SET?. When cured, IC-2000? is pliable enough to be carved with a hobby knife. IC-2000? is the best adhesive for R/C car tires.