Superior tensile and shear strengths, well suited for metal bondingLow gap fill. Methyl base monomer. Excellent on rubber/plastic substrates. Excellent on metal substrates. Poor on porous substrates. Military Spec MIL-A-46050C Type 1. Military Spec MIL-A-46050C Class 1. A primer is required for hard-to-bond materials such as polyethylene, polypropylene, acetal, PET, nylon, soft PVC, silicone rubber, and glass.General information about the Aron Alpha® product line: Cyanoacrylates are single component instant adhesives that bond a wide variety of surfaces with a strong, durable bond. They offer ease of application, a wide range of performance parameters, and reliable solvent-free bonding.Toagosei Co., Ltd. produces cyanoacrylates in Japan, marketed as Aron Alpha® in Japan, Cyanolit® in Europe, and Krazy Glue® in the US. Elmer's Products markets Krazy Glue® to the retail trade and Aron Alpha® to the industrial trade in North America. Information provided by Elmer's Products, Inc.