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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Xtreme Hex Pack | Self Adhesive Sound Deadener

Product ID: 264111364

Details

Brand
Dynamat
Item thickness
0.07 Inches
Material
Butyl Rubber
Product dimensions
81.3L x 45.7W
Recommended uses for product
Enhancing in

🔇Reduces road noise & vibrations

🔥Blocks heat & speaker distortion

✂️Thin, flexible & easy to cut

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₹ 10569

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Description

🔇 Drive Quiet, Live Loud: The Ultimate Sound Deadener for the Modern Car Enthusiast

COMPACT POWER PACK - 4 sq. ft. coverage in one sleek 18”x32” sheet—perfect for doors, floors, and panels.
PEEL STICK AND TRANSFORM - Effortless installation with a super sticky, flexible sheet that molds to any surface.
HEAT SHIELD MEETS SOUND SHIELD - Dual-action butyl rubber blocks heat while enhancing audio clarity.
SILENCE THE ROAD AMPLIFY YOUR DRIVE - Cut down unwanted noise and vibrations for a premium, serene ride.
TRUSTED BY PROS LOVED BY ENTHUSIASTS - Used by top custom builders to keep rides cool, quiet, and classy.

Dynamat Xtreme Hex Pack is a premium self-adhesive sound deadener designed to reduce road noise, heat, and vibrations in vehicles. Featuring a thin, flexible butyl rubber sheet that covers 4 square feet, it offers easy peel-and-stick installation trusted by professional custom builders since 1989. Ideal for doors, floors, panels, and trunks, it enhances sound quality and driving comfort while maintaining durability and heat resistance.

Specifications

ASIN	B00020CAVA
ASIN	B00020CAVA
Best Sellers Rank	#54,502 in Automotive ( See Top 100 in Automotive ) #116 in Automobile Insulation
Brand Name	Dynamat
Coverage	4.0 ft.² (0.37 m²)
Customer Reviews	4.7 4.7 out of 5 stars (673)
Customer reviews	4.7 4.7 out of 5 stars (673)
Date First Available	1 January 2024
Department	Mobile
Global Trade Identification Number	00769103104250
Included Components	Pads
Is Discontinued By Manufacturer	No
Item Dimensions L x W	81.3L x 45.7W centimeters
Item Thickness	0.07 Inches
Item Weight	454 g
Item model number	10425
Manufacturer	dynamat
Manufacturer	dynamat
Manufacturer Part Number	10425
Material Type	Butyl Rubber
Model Number	10425
Product Dimensions	55.88 x 12.7 x 7.62 cm; 453.59 g
Recommended Uses For Product	Enhancing sound quality in automobiles
UPC	769103104250
Unit Count	1 Count

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