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Old 24th September 2012, 03:31 PM   #1 (permalink)
Hugh Keir – PTSYS is getting old
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Sound Proofing your car

I have an old car that is going back together and wanted to fit some soundproofing to it.

Looking on eBay there seems to be the bitumen panels similar to those applied by Nissan and also more spongy stuff.

Is there any one knowledgeable on this subject that can comment on the most cost effective way to sound proof without weighing the car down any more than necessary.

Thanks

Hugh
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Old 24th September 2012, 05:41 PM   #2 (permalink)
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I used some roof flashing from wickes about £10ish a roll did the whole car, just as good ad the expensive stuff.I'll try and find a link.
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Old 24th September 2012, 05:48 PM   #3 (permalink)
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Here you go
Hi-Tack Flashing Strip 10cmx10m - Roof Flashing - Roofing -Building Materials - Wickes
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Old 24th September 2012, 05:50 PM   #4 (permalink)
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Roofing materials in the GTR? :P

I would consider using Dynamat. It's Bitumen based and is very good. Afaik there's a lightweight version of it too.
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Old 24th September 2012, 06:02 PM   #5 (permalink)
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Quote:
Originally Posted by sw20GTS View Post
Roofing materials in the GTR? :P

I would consider using Dynamat. It's Bitumen based.
That's all dynamat is but at a premium.
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Old 24th September 2012, 06:35 PM   #6 (permalink)
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Heavy material as bitumen are for vibration reduction and soft, spungie stuff is for sound level.
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Old 24th September 2012, 07:41 PM   #7 (permalink)
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have a bit of a search dude, there are some great threads on here.

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Old 24th September 2012, 08:52 PM   #8 (permalink)
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As Brains said, bitumen stuff stops vibrations, which is good for improving the sound of your stereo but will do little in the way of reducing road noise. If general road noise reduction is what you're after it's difficult to avoid adding weight. I found mass loaded vinyl combined with closed cell foam to be the most effective material out of what I tried - but it's heavy!

For all the information you could ever want on the subject, talkaudio.co.uk is the place to do your research.
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Old 10th December 2012, 11:23 PM   #9 (permalink)
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really nice, i want to do the same for my car
i've a friend with a golf gti mk3 and he made his car better then more newest car
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Old 11th December 2012, 09:46 PM   #10 (permalink)
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I remember 'doing' a new GM F body using dynamat xtreme and their dynaliner foam on top of that.

It was heavy, no way around it, but a good amount on the wheel houses in the rear with the bitumen went a long way to quiet road noise. It sounded like a vault, and it was a convertible.
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Old 8th June 2013, 11:02 AM   #11 (permalink)
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How would dynamat hold up on the underneath of the bonnet to replace standard thick bulky stuff
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Old 9th June 2013, 11:41 AM   #12 (permalink)
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i would not recommend using roofing material. that stuff uses tar instead of butyl rubber adhesive. which can fall off during hot summer months. i can vouch that the tar based adhesives will do that. when i like in okinawa i had some on the roof of my surf and in the middle of the summer it all came crashing down. i would recommend using something like Vehicle Sound Deadening Materials for Noise Reduction, and Thermal Insulation. Call 800 679-8511. | Second Skin Audio, Made in the USA. they have a variety of products that can turn your car into a tomb if you wanted it too. yes the price is more expensive but you are going to pay for what you get. there are cheaper butyl based ones that you could use i only recommend secondskin because i have had great success with them.
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Old 9th June 2013, 02:14 PM   #13 (permalink)
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How much would all that weight tho
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Old 10th June 2013, 07:31 PM   #14 (permalink)
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Sound proofing by no means is light. I had over 150 lbs of deadener, mass load vynyl and closed cell foam... the car was a tomb. this was also in a car audio competition car so i had my reasons. Also weight isn't a concern when you have 450 lbs of batteries too.
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Old 17th June 2013, 06:27 PM   #15 (permalink)
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Quote:
Originally Posted by carlsworth View Post
How would dynamat hold up on the underneath of the bonnet to replace standard thick bulky stuff
People use the Dynamat on roofs, bonnets and boots with no problems. Prepping the surface is imperative to a successful installation on account of the heat.

http://www.dynamat.com/products_auto...hoodliner.html
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