I spent a few hours yesterday soundproofing the aluminium rear bulhead with Silent Coat Extra 4mm.
This has made much more of an improvement in bevel box noise than either Millers 140 or Redline 250.
Do you recommend that over Dynamat?
I've not used Dynamat so couldn't comment.
I saw a review of Silent Coat on another forum and it seemed a reasonable price for the 4mm sheet. Easy to cut (I used a cheap pair of tin snips and a stanley knife) and straightforward to apply.
One thing I didn't want was anything too thick as I need evey bit of seat space.
