Each Insta-Weld kit comes with Insta-Weld 1, Insta-Weld 2, Activator, and Weld Compound. A complete set of instructions is included with each kit. this kit is designed to repair SMC, fiberglass, hard plastics, metals, rubber and other materials too numerous to mention. It does not work on polypropylene, polyethylene or TPO substrates. The small Insta-Weld kit comes with a 1 oz. bottle of bothe the Insta-Weld 1 and Insta-Weld 2 and a 2 oz. bottle of Activator and weld compound.