Iggy
Guru
I have a 5.5K genset with the foam rubber needing replacement. I called NorthernLights and there is no replacement. Has anyone had this problem and found a replacement foam rubber? Thanks!
NorthernLights sound box
- Thread starter Iggy
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guy with a boat
Guru
Try Soundown https://soundown.com/noise-control-products-all/
They will have something that will work.
Cigatoo
Guru
Mass loaded vinyl.
https://isostore.com/totalmass-mlv-...J-GmwGmUaWKZDXt4Wj5yoHt1QANL_YMxoC8XYQAvD_BwE
Home Depot also carries it.
https://isostore.com/totalmass-mlv-...J-GmwGmUaWKZDXt4Wj5yoHt1QANL_YMxoC8XYQAvD_BwE
Home Depot also carries it.
Keysdisease
Guru
The typically available 1" 1lb vinyl/foam composite insulation will provide an upgrade from the factory insulation, cuts easily, is available with peel and stick for easy installation, and because it is faced will outlast OEM foam.
Just Mass Loaded Vinyl (MLV) will work, but not as well as Mass Loaded Vinyl sandwiched between an absorber layer and a decoupler layer like what comes in a vinyl/foam composite.
Like Mako says, 2lb vinyl will technically work better, but the air intake penetration in the enclosure creates the baseline for noise on a small genset. Better insulation than 1" 1lb on the enclosure will work better, but 3 ft away you will not notice the difference over 1lb because of the intake penetration. Also 2lb makes the panels heavy, and will call for mechanical fasteners if used in a vinyl/foam composite, or epoxy (or similar) as an adhesive. It weighs 2 lb per sq ft.
Just Mass Loaded Vinyl (MLV) will work, but not as well as Mass Loaded Vinyl sandwiched between an absorber layer and a decoupler layer like what comes in a vinyl/foam composite.
Like Mako says, 2lb vinyl will technically work better, but the air intake penetration in the enclosure creates the baseline for noise on a small genset. Better insulation than 1" 1lb on the enclosure will work better, but 3 ft away you will not notice the difference over 1lb because of the intake penetration. Also 2lb makes the panels heavy, and will call for mechanical fasteners if used in a vinyl/foam composite, or epoxy (or similar) as an adhesive. It weighs 2 lb per sq ft.
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I didn’t use the commercial foam/ MLV sandwich material like @KD mentioned, because of budget.
But I did not use epoxy, instead used 5200 equivalent. It has flex to it and adds a small amount of decoupling, although not as much as the foam of course.
But I did not use epoxy, instead used 5200 equivalent. It has flex to it and adds a small amount of decoupling, although not as much as the foam of course.
