Blu -Tack Under Bookshelf Speakers?


I heard that Blu-Tack is a good substance to put between bookshelf speakers and stands for absorbing resonance. How much would I need to use on a 8"w x 11"d speaker on a 8"x8" platform? Do similar substances like FunTac and Elmer's Tac n' Stick work the same? (I'm having some trouble tracking down the original.)

Thanks in advance for any advice.
socprof
Elizabeth:

I used the Dep for two years on the same speakers (Reynaud Twins in cherry). There was no damage to the finish (I could not even tell where it had been once I removed the tack to resell the speakers).

However, I have not tried it on painted finishes or those with a plastic top coat.

Also, what are concrete Mother's (sound interesting)?
CDC:

I remember seeing these, or something like them, years ago. I seem to recall that their use was being recommended with a specific speaker (perhaps the speaker manufacturer was endorsing them)?

Used to have a pair of soccer shoes with little shock absorber devises that protruded from the edges of the heels/soles. Other than looking extremely odd, they were my most confortable pair by far.
Warrenh, is there any more-less detailed manual how to chose and use those audiopoints?
I have the same problem with my Revels M20, and Blue Tac doesn't make me feeling good. My stands have their own four spikes on both sides, but I don't use the upper ones - don't want to damage a finish on the speakers. Are coupling discs the solution here? Should the original spikes be replaced with the ones from audiopoints?