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McFly
Last seen: 13 hours 12 min ago
Joined: 10/22/18
Posts: 135
Engine Cover Batting material - where / what to get...

Hi there, the fire proof sound dampening batting on the inside of my engine cover is coming apart and needs to be addressed.  Does anyone have a suggestion as to what to buy and where to get it?  Hoping to find the same metalic fire resisitant sound dampening material that is currently there (but falling apart).  Thanks!

Mike

Jackfish Girl, 1999, C36 MKII, Tall Rig, Wing Keel, In-mast furling, Phinneys Harbor, Bourne, MA

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Jackfish Girl, 1999, C36 MKII, Tall Rig, Wing Keel, In-mast furling, Phinneys Harbor, Bourne, MA
Catboat Willy's picture
Catboat Willy
Last seen: 23 hours 5 min ago
Joined: 12/22/14
Posts: 234

Mike;
Most of the offerings for sound proofing your engine box are usually quite effective, however you should calulate the additional weight it will add to the engine box. The item I looked at added almost 20 lbs. to the weight of the cover. Since I check the oil every day before heading out, I determined that additional weight of the box was more than I was willing to handle. In the end, I used a lighter weight material from these folks.  Take a look at these offerings from Sailors Solutions at; ​
https://www.sailorssolutions.com/?page=Products&SubCategoryID=121&SubCategory=Soundproofing&Category=Engine%20Room

 

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Bill Dolan 1990 Catalina C-36 MKI - Hull #1041  'Williwaw'
Std. Rig, Walk Through, Wing Keel
M35, Oberdorfer Conversion,
Home Waters; Port Charlotte, FL
'You are never out of work if you own a boat'

 
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Chachere
Last seen: 1 hour 5 min ago
Joined: 10/27/10
Posts: 597

I added the insulation from Sailors Solutions maybe 3 years ago.  Sealed all the seams with metalic tape, also added foam seals to the box where it joins the floor and the adjacent surfaces.
It helped cut the noise. I did make for a somewhat heavier engine cover, but still manageable.

HOWEVER,  I've found that the adhesive has begun to fail after only a few seasons.   I insulated not only the cover, but the sides and the rear box (where the exhaust riser runs).  The material that I installed over the exhaust riser failed the quickest -- I think the ashesive can't handle some of the higher temperatures.

 

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Matthew Chachère
s/v ¡Que Chévere! #466
1985 C36 MKI tall rig fin keel M25
Homeported in eastern Long Island, NY

two-rocks
Last seen: 2 months 2 weeks ago
Joined: 8/11/17
Posts: 42

I put 1.5" material from Defender (used 2 sheets). I attached it with 110 1.5" ss screws with fender washers. I didn't want any adhesive, as it does not last. Cut the noise in half, which means it's still loud - just better.

It was surprising to find the 1/2" material catalina put in was a decent product (lead barrier and all) - just way too thin and only on the front cover itself - I put it averywhere and have a couple more areas to get to. A huge plus was the reduction in cabin heat.

 

TadTV
Last seen: 3 weeks 4 days ago
Joined: 9/17/16
Posts: 25

I used two pieces of Soundown IVF1010MNSFT12 SOUNDOWN COMPOSITE INSULATION VINYL/FOAM 378-IVF1010MNSFT122.
Each piece is now $76 at Tweetys.com. There was enough to do the inside of the shelf in the aft cabin as well. I used stainless fender washers and #8 or #10 screws- 1" I believe to hold in place. And foil tape for the edges/seams. Works really well- big noticeable difference in the sound from having nothing there before. It does add about 20-30 pounds to the whole box.

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Tad
Simpler Times
1989 C-36 MK I #1004
Redondo Beach, Calif.
 
McFly
Last seen: 13 hours 12 min ago
Joined: 10/22/18
Posts: 135

Sounds good Tad.  But the more i think about this project, the more I think about how heavy the box will be.  It's important for me to be able to lift the engine cover out by myself.  Adding another 20lbs could be tough.  

Mike

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Jackfish Girl, 1999, C36 MKII, Tall Rig, Wing Keel, In-mast furling, Phinneys Harbor, Bourne, MA
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