another spectrum question

[lockdown801]

I just purchased 2 gallons of spectrum. I was wondering how much area will each gallon effectively cover? I am tearing out my interior of my ram mega cab so I can use this stuff top to bottom.

[Reallunacy]

Their site says:

Specification

Weight per wet gallon = 12.5 lbs.

Weight per cured gallon = 10.2 lbs

Coverage: 1 gallon = 40 sq ft @ 40 mils thick (40/1000") or 1mm

Suggested Thickness:

Minimum = 40 mils (1mm)

Reccomended thickness = 80 mils (2mm)

Maximum = 120 mils (3mm)

on the spectrum page.

http://www.secondskinaudio.com/sound-deadener/spectrum.php#tab5