Deadener on plastic

[bradl79 10+ year member]

ok i got a 2014 kia forte and the door panels are plastic (a thick plastic, so should i still put some deadener on it, i'll take a pic later.

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[bradl79 10+ year member]

??

 

[Jeffdachef 5,000+ posts]

If your on a budget, just cover the gaps and see if the midbass is rattling the panels a lot and add more on trouble spots as needed. If money is no issue then i'd go for the 100% coverage.

 

[bradl79 10+ year member]

No gaps I was thinking of doing full coverage

 

[calebkhill 10+ year member]

Are they rattling?

Use foam between the points that are rattling. Rattling comes from panels vibrating against each other.

 

[bradl79 10+ year member]

i am not sure yet, b/c i have not installed my new speaks, just found it odd that my panels are made of heavy plastic, do u think deadener will even work on it? there are tons of grooves, i'll have pics tomorrow.

Hey Caleb, how have u been doing, how has build been going.

 

[trumpet 5,000+ posts]

If the panel doesn't vibrate from bass then don't waste your money and time applying deadener to it. I've seen shops cut deadener into little pieces to put it into crevices on panels that have no need for deadener. Grooves, ribs and curves add stiffness to resist vibrations and resonances, at least that's the way I understand it.

 

[bradl79 10+ year member]

would it help with keeping the heat out for the summer and outside noise though? i guess since i am not getting much rattle since my doors are mainly mids and highs i may not need to deaden, but i want to reduce noise.

 

[trumpet 5,000+ posts]

would it help with keeping the heat out for the summer and outside noise though? i guess since i am not getting much rattle since my doors are mainly mids and highs i may not need to deaden, but i want to reduce noise.

No, that's something some brands advertise as benefits of their vibration damper but it's a very minor effect compared to other products. Welcome to Sound Deadener Showdown | Sound Deadener Showdown

 

[bradl79 10+ year member]

what mlv would u recommend?

 

[UMWDawg92 10+ year member]

No, that's something some brands advertise as benefits of their vibration damper but it's a very minor effect compared to other products. Welcome to Sound Deadener Showdown | Sound Deadener Showdown

I've learned this the hard way. 100% coverage is a waste. I did one door on my old car 100% coverage and the other with about 40% and I could not tell the difference at all. Sealing made the most difference as far as sound was concerned. If you want to keep noise out then look into mass loaded vinyl

 

[bradl79 10+ year member]

United Plastics Corporation dB2-4walls 4 ft. x 8 ft. Acoustical Barrier-db24x8pb at The Home Depot would this work at all, MLV is so expensive

 

[calebkhill 10+ year member]

Hey man. Install is slow but sure. Currently working on fiberglass a pillars.

Maybe this helps?

Budget MLV and absorption at Home Depot

 

[Jeffdachef 5,000+ posts]

Hey man. Install is slow but sure. Currently working on fiberglass a pillars.
Maybe this helps?

Budget MLV and absorption at Home Depot

sure as hell helped me! thanks for the link caleb! off to an MLV installing spree!!!

 

[bradl79 10+ year member]

i got some GTMat deadener but it will not stick to my plastic panels (mainly b/c the deadener is not very tacky, don't want to spend to much), which is so weird that Kia made the panels plastic, so i just deadened the inside of the doors, so i may try that MLV project once i can figure out how it works.