Radiant Barrier Insulation

Not for what you need it for....you would be better off covering the outside of your garage with it.

You need this type of insulation, fiberglass with a foil backing. Spray glue your metal and stick the fiberglass and tape up your seams with foil tape....and also it will be much brighter in the shop area...win..win,

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You gotta link to that stuff? It looks thinner than most, which is what I need.