Regular duct tape (grey tape) works just fine on cold air return ducts. However, if it is on a duct that carries warm air, it will dry out over time. Warm air ducts require a different kind of duct tape (silver tape) that is like sticky aluminum foil. They are both duct tapes though.
Wrong.
Regular duct tape (grey tape) works just fine on cold air return ducts. However, if it is on a duct that carries warm air, it will dry out over time. Warm air ducts require a different kind of duct tape (silver tape) that is like sticky aluminum foil. They are both duct tapes though.