Whats on your turntable tonight?

There’s another company, their name escapes me now, that had a brush on product that I was highly interested in at the time.

Steve,

DynaMat was pretty much created for the auto industry; for use under hoods, trunks, etc. So pretty impervious to water.

The bad thing about it is trying to remove it. Attempted once, and quickly gave up. So, when you place it, you better not want to move it again. Which is why I might take a look at the other dampening product you mentioned from Parts Express.

DynaMat is excellent for stopping ringing of metal.  Great for car doors, floorboards, fire wall, rear quarter panels, etc. (I worked in the car audio industry for 34 years).  Not necessarily for home audio products, though.  Draining vibration, or, microphonics from within the audio component is more important and delivers better results, sonically.  DynaMat or other such materials won't help that.  A vibration drainage device/system is more in line to do so.  However, if one chooses to dampen the component chassis vibration then maybe try a self adhesive sorbothane sheet.  Audioquest sells 6" X 6" X 1/8" sheets and they are inexpensive.  Recommended use is, for example, inside the top cover of a CD player.

Canned Heat "S/T"
Sundazed/mono
in the Vibrato