If I want to use it to wrap heat/air duct pipes up in the attic, should the aluminum side be on the inside or outside?

Should be on outside. The shiny surface has two functions: If heating season, the shiny surface has less heat radiation into the attic than any other surface color. When cooling, that shiny surface reflects -reduces the absorption - of heat radiation.

Want to insulate the kitchen fan exhaust pipe; is this an appropriate product for that use? If not, what should I use?

This would work using aluminum foil tape for the seams.

This is a roll of insulation 12 inches wide -- 15 foot long and 2 inches thick, there may be sheets of material in the 2 inches but I never counted them -- it is just 2 inches total thickness

Can this be used to wrap an aluminum dryer vent tube to prevent condensation on the outside of the tube during the winter?

I used it to insult my bathroom fan duct running through the attic. I had a problem with condensation dripping down into the bathroom. This fixed the problem.

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Manufacturer	THERMWELL PRODUCTS
UPC	077578022956
Part Number	SP55/6
Item Weight	2 pounds
Product Dimensions	19.5 x 28.8 x 14.3 inches
Item model number	SP55/6
Is Discontinued By Manufacturer	No
Size	12" x 15'
Color	Silver
Style	2" x 1ft x 15 ft, R-6
Shape	shape
Voltage	1
Wattage	1
Item Package Quantity	1
Number Of Pieces	1
Sound Level	1 Sones
Coverage	2160 square inches
Included Components	Thermwell foil wrap
Batteries Included?	No
Batteries Required?	No

Frost KingTHERMWELL PRODUCTS SP55/6 Foil & Fiberglass Duct SP55 Fiberglass Pipe Insulation, 12" x 15', Silver

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