On Mon, 2 Jul 2007 16:24:35 +0300, "Mike" wrote:

am looking to take off all registers inside house and use mastic to seal all the
boots. is it as simple a job as just covering hand with latex glove and smearing a
generous amount into the area where the boot meets the sheetmetal duct?

any info or corrections are appreciated. home depot sells the mastic so I know at
least where to get it


That may or may not help. Do you know that you have leaks there that
need sealing?

What's the R Value of your ducts? Lowes sells insulated ducts that
are likely double the R Value of yours. So replace them.