Sound deadening

[Dubed]

Good morning.
What are you all using for sound deadening material under the doghouse? Motor is fairly close, so a bit of heat. In a perfect world, something self adhesive would be great, but I don't want it to continually fall off.
Anyone use a product they are happy with?

Thanks
Dave

 

[southkogs]

I think my doghouse has the same type of stuff used in cars: I'm no expert, but I think you can find all types of them on Amazon.

 

[Dubed]

I think my doghouse has the same type of stuff used in cars: I'm no expert, but I think you can find all types of them on Amazon.

Yes a Google search comes up with quite a bit, even west marine carries some.
I'm just wondering if anyone has installed any certain brand and has been happy with it before I just give it my best guess.
Thanks

 

[briangcc]

There wasn't any in my FourWinns. In my Chap, there's egg crate looking stuff glued to the underside of the engine hatch and along both jump seat backs. I used some Gorrilla Glue spray adhesive to reattach a piece last year.

In my classic car, I have foil backed, no-name stuff from JC Whitney which I used 3M spray adhesive to adhere and foil tape to close the gaps between sections.

Unless the engine is horribly loud, I'd be of the mindset to just leave it off - one less potential issue in the engine compartment.

 

[Dubed]

There wasn't any in my FourWinns. In my Chap, there's egg crate looking stuff glued to the underside of the engine hatch and along both jump seat backs. I used some Gorrilla Glue spray adhesive to reattach a piece last year.

In my classic car, I have foil backed, no-name stuff from JC Whitney which I used 3M spray adhesive to adhere and foil tape to close the gaps between sections.

Unless the engine is horribly loud, I'd be of the mindset to just leave it off - one less potential issue in the engine compartment.

Its louder than I would like...
I installed some in my old 340 Challenger but can't recall what it was.
The more I research, I see they recommend having a nailer for overhead applications. Not going to do that. I assume the heat eventually wins over the adhesive.

 

[briangcc]

You might look into sprayable alternatives....Lizard Skin is one I've heard a few times.

Sound Control Automotive Sound Dampening Coating - LizardSkin Insulation

For maximum car sound dampening performance, coat the car's entire interior surface and floor, inside and out with LizardSkin Sound Control.

lizardskin.com

 

[Dubed]

You might look into sprayable alternatives....Lizard Skin is one I've heard a few times.

Sound Control Automotive Sound Dampening Coating - LizardSkin Insulation

For maximum car sound dampening performance, coat the car's entire interior surface and floor, inside and out with LizardSkin Sound Control.

lizardskin.com

Yup. Thats interesting!

 

[Scott Danforth]

OEMs use https://soundown.com/

 

[Bob_VT]

I just feel compelled to say this ............. I agree with most people's suggestions but offer two altenatives....... forget the soundproffing and get a bigger Amp & Speakers......... turn it up and like majic you will not hear the motor and the cheapest way is to get earplugs.

 

[silverbul]

why not just go to the local hardware store and get a sheet of that pink board insulation, easy to cut, pretty cheap and i'm pretty sure the melting point is well over 400 f but you might want to check on that. jmo

 

[tpenfield]

I'm all for the egg crate stuff. I know 'marine' grade sound insulation has a foil layer to it, but the flat surface does not seem like sound deadening to me (more like sound reflecting) .

 

[Dubed]

I just feel compelled to say this ............. I agree with most people's suggestions but offer two altenatives....... forget the soundproffing and get a bigger Amp & Speakers......... turn it up and like majic you will not hear the motor and the cheapest way is to get earplugs.

Lol. I wasnt looking for stereo suggestions, I dont even have A radio, never mind a louder one.
As for the earplug suggestion.... I suppose I could just bring my ex wife to drown it out

 

[Dubed]

why not just go to the local hardware store and get a sheet of that pink board insulation, easy to cut, pretty cheap and i'm pretty sure the melting point is well over 400 f but you might want to check on that. jmo

Its pretty rigid, wouldnt conform. Also dont think it would adhere very well

 

[Dubed]

OEMs use https://soundown.com/

Thanks, I'll look at it

 

[DeanoD13]

I think my doghouse has the same type of stuff used in cars: I'm no expert, but I think you can find all types of them on Amazon.

Spray foam insulation works well, clean the area to cover good then having a disposable trowel handy,( cement trowel works good) as the spray rises, expanding use the trowel to maintain thickness. Practice on a piece of cardboard before you try your boat. in order to smooth it better use a belt sander.

 

[brodmann]

I purchased some Noico foil faced sound deadening material off of Amazon to put under the cowling of my 115 Yamaha and it worked great. Very aggressive "peel and stick" adhesive and it has a little stretch to it so it forms to curves and corners well. It's surprisingly heavy. It's like it's got lead in it. It cut the noise down a good bit in my boat. My wife always asked me to go slower so we could talk to each other. Now I can go at pretty much WOT and we can still carry on a conversation. I thought it worked better than expected and I was quite pleased with the stuff. Obviously, you have a lot more room to work with than I did, so expanding foam might be the way to go. If you have a good car stereo shop in your area, they would probably spray some of the stuff they use for you at a pretty good price.

 

[Scott Danforth]

spray foam insulation is not fire resistant.

marine sound deadening foam is.

 

[Scott06]

I used these guys when I replaced the egg crate sound deadening in my old boat. They had several options with different costs... of course better material = more dough. They were knowledgeable about what materials had the correct fire ratings for marine applications which is good to keep an eye one.

Soundproofing & Acoustic Solutions | Soundproof Cow

Soundproof Cow is the leading online provider of soundproof & sound absorbing materials. We offer acoustic & soundproofing supplies for any space. Order online!

www.soundproofcow.com

 

[Dubed]

I used these guys when I replaced the egg crate sound deadening in my old boat. They had several options with different costs... of course better material = more dough. They were knowledgeable about what materials had the correct fire ratings for marine applications which is good to keep an eye one.

Soundproofing & Acoustic Solutions | Soundproof Cow

Soundproof Cow is the leading online provider of soundproof & sound absorbing materials. We offer acoustic & soundproofing supplies for any space. Order online!

www.soundproofcow.com

Thanks Scott. Yes, that's a big concern of mine also. I want to make sure it's appropriately rated and I want it to stay put!

 

[Scott06]

Thanks Scott. Yes, that's a big concern of mine also. I want to make sure it's appropriately rated and I want it to stay put!

They had me use PL polyurethane construction adhesive- again were particular about right materials for the application.

I think I went with the cheaper end of what they offer (eggcrate foam which was what was in there from factory) probably spent $125-200 and it made a noticeable difference vs the flaking original stuff. And this was on a 3.0 which I would swear is the loudest engine pre cubic inch of displacement ...