I'm reading some threads about insulation for the underside of the hood. I'm mainly interested in noise reduction, not necessarily heat.
I'm aware that some LJs came with OEM insulation but I'm betting that there are other products that would work better when the concern is specifically for sound.
I already have about 40% of the underside of the hood covered with some butyl tiles (like Noico), so I'm looking for something to go over that, creating a barrier across the whole underside of the hood.
The main thread on this forum mentions Uxcell. I haven't read all 15 pages of that thread. Has anyone else used this and care to share their results?
Or, any other products to recommend for sound dampening under the hood?
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UPDATES
I'm aware that some LJs came with OEM insulation but I'm betting that there are other products that would work better when the concern is specifically for sound.
I already have about 40% of the underside of the hood covered with some butyl tiles (like Noico), so I'm looking for something to go over that, creating a barrier across the whole underside of the hood.
The main thread on this forum mentions Uxcell. I haven't read all 15 pages of that thread. Has anyone else used this and care to share their results?
Or, any other products to recommend for sound dampening under the hood?
———
UPDATES
- Sailor's Solution:
- Marketed for sailors and intended for dampening sound of a diesel engine.
- Product is a "high density polymer". I don't know if that's encouraging or concerning.
- Product comes in 1'x1' tiles, so would require puzzle-piece application, rather than a blanket approach.
- Product is 1" thick and appears quite stiff, so may not be ideal for the curves of underside of hood.
- But, site claims it is flexible and suitable for curves down to 3" radius. Installation video here.
- Cost is $10.50 per 1'x1' tile.
- DEI Under Hood:
- Marketed for automobiles, and claims to help with both heat and sound.
- Don't see a description of materials, but looks a bit like dense fiberglass?
- Comes in a roll of 32” X 59” (13.1 sqft), and costs $131, so $10/sqft.
- SoundSkins Heat Shield:
- Marketed for automobiles, and claims to help with both sound and heat anywhere outside of the 'cabin'.
- They put an emphasis on protecting paint from heat. The way it gets installed in the video also suggests that the main focus is heat.
- Materials are 0.4" close-cell foam with a fiberglass aluminum foil outside layer.
- Comes in a roll of 39.5" x 197" (54 sqft), and costs $250, so about $4.60/sqft.
- Marketed for automobiles, and claims to help with both sound and heat anywhere outside of the 'cabin'.
- Dynamat Hoodliner:
- Marketed for automobiles, and claims to help with both heat and sound.
- Materials are a 3/4” acoustic sound soaker foam (polyether urethane based), with a reflective aluminized skin.
- The foam is a mix of open and closed cells, which they claim maximizes sound absorption.
- Comes in a roll of 32" x 54" (12 sqft), and costs $70.50 on Amazon, so $5.86/sqft.
- Note: they also recommend it in addition to Dynamat Xtreme, which is their butyl product like Noico.
- (Beginning to sound like Sound Deadener Showdown, below.)
- Sound Deadener Showdown:
- Owner retired, and original site is now down. Used to be a great place for instructions, supplies, and even application jobs.
- First step was "CLD Tiles" (butyl) on 25–40% of sheet metal surface area.
- Second step was a thin layer of closed-cell foam. Partly for sound dampening, and mostly as padding for Step 3.
- Third step was mass-loaded vinyl over the closed-cell foam.
- Fourth step was butyl rope at all the joints/seams of the mass-loaded vinyl.
- Steps 2 and 3 would be applied with spray-on adhesive like this.
- Note: Steps 2 and 3 might be replaced with Dynamat DynaPad, which seems to be these two materials in one product.
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