Can this be used on a engine cover/dog house on a inboard outboard boat

I can't speak for your I/O boat but I used it in my van's engine cover which gets really hot and have had no problem what so ever. Good luck.

Is there enough material to cover two doors

Not unless you have really small doors. The better way to do it is with the "door kit". It consists of 4pcs of 12"x36" and is made for 2 doors. What ever you don't use on the inner door skin you should use on the outer door skin. And don't forget directly behind the speaker. I used 36 sq ft on a 04 f150 with the doors and rear wall including back floor where the dual subs are.

how many sheet would you use for 4 car speaker?

Hi Thank you for the question, and it really depends on how much you want to spend.For example, "I" would use just one of these 32x18 sheets for one door. Applying to the outer door inner panel as well as the door panel for the speaker.This way you will not loose your music to the car next to you, or entertaining everybody you pass.You may look into getting 4 boxes of these and do that, or you can get (2) two door speaker kits (12X12).I would recommend the full coverage for medium to high powered audio systems. Especially if your vehicle is Honda , Toyota, or where the sheet metal is super thin.Thank you for choosing the Wires Zone.

How does it hold up when it gets wet regularly? My jeep leaks...

Water does not effect dynamat at all. Once installed it sticks very well to the metal surface of your vehicle. Just make sure the edges are pressed down well so water can’t seep under it and start the rusting process on your Jeep. Clean the surface well before putting the Dynamat down so it sticks.

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Dynamat Xtreme Sound Deadening Car Insulation Single Sheet Hex Pack 10425 – Noise Dampening for Floor, Doors, Hood or Trunk – Easy Self Adhesive Install – Made in USA – 1 Sheet 18”x32”, 4 sq ft

Dynamat Xtreme Sound Deadening Car Insulation Single Sheet Hex Pack 10425 – Noise Dampening for Floor, Doors, Hood or Trunk – Easy Self Adhesive Install – Made in USA – 1 Sheet 18”x32”, 4 sq ft

Product ID: 1893817

Details

Brand
Dynamat
Item Thickness
0.2
Material
Rubber
Product Dimensions
32"L x 18"W
Recommended Uses For Product
Enhancing in

🔇Reduces road noise & vibrations

🛠️Easy peel-and-stick install

🇺🇸Made in USA, trusted since 1989

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RM344

Duties & taxes included

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔇 Drive Quiet, Live Loud: The Ultimate Sound Shield for Your Ride

PRECISION FIT FOR EVERY PANEL - Perfect 18”x32” sheet covers 4 sq ft of floors, doors, hoods, or trunks.
SILENCE THE ROAD AMPLIFY YOUR DRIVE - Cut down unwanted noise and speaker distortion for a premium audio experience.
TRUSTED BY PROS LOVED BY ENTHUSIASTS - Used by top custom builders to keep rides cool, quiet, and classy.
AMERICAN MADE QUALITY YOU CAN COUNT ON - Original soundproofing pioneer crafted in Ohio since 1989.
EFFORTLESS INSTALLATION INSTANT UPGRADE - Thin, flexible sheet with a powerful adhesive backing—no pro needed.

Dynamat Xtreme is a premium sound deadening sheet designed to reduce road noise, vibration, and speaker distortion in vehicles. Measuring 18”x32” and covering 4 square feet, it features a thin, flexible rubber material with a strong peel-and-stick adhesive for easy DIY installation. Trusted by automotive professionals and made in the USA since 1989, it’s the go-to solution for enhancing in-car audio and comfort.

Specifications

ASIN	B00020CAVA
Best Sellers Rank	#7,925 in Automotive ( See Top 100 in Automotive ) #16 in Automobile Insulation
Brand Name	Dynamat
Coverage	4.0 ft.² (0.37 m²)
Customer Reviews	4.6 4.6 out of 5 stars (491)
Global Trade Identification Number	00769103104250
Included Components	Pads
Item Dimensions L x W	32"L x 18"W
Item Thickness	0.2 Centimeters
Item Weight	1 Pounds
Manufacturer	Dynamat
Manufacturer Part Number	10425
Material Type	Rubber
Model Number	10425
Recommended Uses For Product	Enhancing sound quality in automobiles
UPC	769103104250
Unit Count	1.0 Count

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