Master Bond Speedbond 33 is an extra-fast curing, high viscosity, no-mix high performance aerobic

adhesive system featuring remarkably high peel and shear strength together with exceptionally great resistance to vibration and impact. This unique product is comprised of low viscosity liquid activator and the base adhesive resin. No mixing is necessary prior to use. For bonding, the activator is applied to one or both of the surfaces to be joined and let dry for approximately two minutes. The adhesive resin is then applied to either of the surfaces to be joined and the parts to be bonded are assembled. Only contact pressure sufficient to maintain the parts of their proper position need be applied during assembly until handling strength is developed because the 100% reactive adhesive does not contain any solvents or diluents. Handling strength is achieved surprisingly fast usually well within 5 minutes, the exact time depending on the surfaces to be joined and the gap width. For many close fitting surfaces adequate handling strength can be obtained within 1-2 minutes. Maximum bonding strength i.e. full cure is achieved within 6 hours or less.

While rapidly providing high shear and peel strength as well as superior resistance to vibration and impact, Master Bond Speedbond 33 optimizes many different bonding operations, enhances productivity and reduces failures not only during manufacturing operations but also during shipment of bonded parts and in actual service. Unlike most other adhesives, its performance is relatively insensitive to substrate cleaning procedures. For optimum strength, proper substrate cleaning is recommended. Master Bond Speedbond 33 has a low odor, readily workable rheology, and can be easily dispensed with simple commercially available dispensing equipment. It is particularly recommended for bonding metal surfaces such as aluminum, steel, plated steels, galvanized steels, copper and copper alloys etc., also ferrites and wood. This product is not recommended for plastic substrates. The convenience of an extra-fast ambient temperature, no mix cure and the reliable high performance of this adhesive system have assured its wide usage in the electronic, electrical, computer, metalworking, appliance and aerospace industries.