Dynabrade 48345 .4 hp Straight-Line Die Grinder, Rear Exhaust, 30,000 RPM, 1/8" Collet 
3M 85493, Scotch Foil Tape 3311-50A, 2.0 in x 50 yd (50.8 mm x 45 m), 7010340408
This item has been Discontinued.
3311 is ideal for sealing joints and seams against moisture and vapor on foil jacketing insulation. It can also be used in general maintenance and automotive repair.
Scotch Foil Tape 3311 is a conformable tape with silicone treated liner that unwinds easily to minimize errors and wasted tape . It is flexible and easy to apply in tight spaces, making it the ideal tape for duct repairs. The soft aluminum foil also conforms to irregular surfaces and provides a reliable vapor barrier.
