Thin plastic film on Bitumen pad for damping enclosure: leave it or remove it ?

[DRONE7]

Another option would be to use Bitumen Paint.... that will provide a supple adhesion to just about anything....including hands...

 

[Sangram]

You can leave the film on. I use a heat gun for those materials, hot bitumen adheres very easy and the film helps to not get your hands messy when sticking it on.

Felt is not needed when using Bitumen. For bass reflex you might need a small amount of stuffing.

Bitumen adds some mass to the cabinet wall for large unbraced surfaces. For well-braced construction, it is not really necessary. I use it to upgrade cheap speakers with poor construction internally. For properly braced enclosures, I am unable to measure or hear any differences.

 

[NareshBrd]

Bitumen paint will not stick to plastic I think.
It is also messy, and may need heating.
And will have a lingering smell, bad in a closed room.


Sticker glue costs about the same as PVA wood glue.

 

[DRONE7]

Bitumen paint will stick to plastic, is messy, but does not need direct heating.
On a very cold day it may help to place the paint container in a bowl of warm water to increase it's flow.
I've used it for years and not noticed any 'smell' let alone a lingering one !