Sound insulation

i am pretty sure they have been linked in almost every sound insulating post.
Search around, we had a few productive threads on this topic not too long ago
 
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Reactions: Kenneth G Zinis
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Reactions: Kenneth G Zinis
I would avoid using adhesive or painting or spraying anything onto the tub interior. Makes for a lot of work if you need to make any repairs in the future.
FWIW the Hotheads is adhesive material, not an added adhesive. It would come up if you had to remove the insulation. Just clarifying. I wouldn't pour some adhesive on there (or use a bedliner material).