Aluminum-filled epoxy putty for dependable non-rusting repairs to aluminum castings, machinery and equipment widely used in HVAC applications. KEY FEATURES : Repairs air conditioning system components Listed under NSN Stock #8030-00-051-4511; #8030-00-670-8553 Bonds to aluminum and many other metals Fills porosity in aluminum castings Can be machined drilled or tapped using conventional metalworking tools Qualifies under Mil Spec MIL-PRF-24176C, Type II