Top Hat Tube Dampers?

Listened to the Fosgate last night with the Top Hats installed. There was an improvement in the quietness of the background. Music came from a more black background. It was quieter, allowing me to hear deeper into the music. This was not a night-and-day difference with vs. without the top hats, but I do like what they are doing. I'm going to search the internet to see if I can buy another pair from someone, as the instruction manual makes a comment about the effect being cumulative. Thanks again for helping me identify what glue I needed to use.
Happy New Year!

Thanks for the info. I thought it was Elmer's, but didn't want to try until it was confirmed.
I'll let you know what I think about them, after I install them (probably tonight). I'll be using them on a couple of tubes in my phono preamp (Fosgate).