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can anybody recommend an online supplier of reasonably priced sound deadening - the stuff like dynamat with the silver foil backing (must have the foil backing). need some decent sized sheet rather than the silly over priced little squares than most places sell.
thanks Matt
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niwid
Posted a lot
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Posts: 1,743
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Believe it or not, I've heard great things about flashing tape. Sooooo much cheaper link
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Last Edit: Dec 3, 2013 12:38:22 GMT by niwid
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Believe it or not, I've heard great things about flashing tape. Sooooo much cheaper linkJust came in to say the same thing, plus you can get it from just about any local DIY store.
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Believe it or not, I've heard great things about flashing tape. Sooooo much cheaper linkJust came in to say the same thing, plus you can get it from just about any local DIY store. i agree completely but it'll look curse word if i'm running the car without carpet hence i'm after the silver stuff. dynamat is the brand name but is so expensive for a bit of bitumen and silver foil
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MrSpeedy
East Midlands
www.vintagediesels.co.uk
Posts: 4,786
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So, could you not stick on the flashing tape and then stick some baking foil onto that?
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ChasR
RR Helper
motivation
Posts: 10,201
Club RR Member Number: 170
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sound deadeningChasR
@chasr
Club Retro Rides Member 170
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Believe it or not, I've heard great things about flashing tape. Sooooo much cheaper linkThis is true to a point IMO. Over something like basic Dynamat (bitumen based) yes ![:)](//storage.proboards.com/forum/images/smiley/smiley.png) . But compared to something SecondSkin Damplifier Pro Pro or Dynamat Xtreme (Both butyl based) it will take around 4 layers of flashing tape to give a similar effect but with more drawbacks (adhesion and actually fitting panels back on are two issues). That has been tried by a number of people as well (people who were not affiliated with industries etc. but if I am a little honest, probably trying to quench their curiosity a little too much!) MaxMat is meant to be almost as good as the half decent ones but with the price being somewhere between the SSP/DX products and flashing tape.
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Last Edit: Dec 3, 2013 23:58:25 GMT by ChasR
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Chasr - Do you have any links to the flashing vs proper stuff tests? Just out of curiousity really, as I've just put 3 or four layers of flashing over pretty much every internal surface in my van after getting a massive roll for free.
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ChasR
RR Helper
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Posts: 10,201
Club RR Member Number: 170
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sound deadeningChasR
@chasr
Club Retro Rides Member 170
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A few of them are some rather geeky forums that some chaps here are all too familiar with (talkaudio). I am happy to dig up some threads if you wish. Some of it was word of mouth from friends who had tried all sorts throughout the years, with me listening, and sometimes even driving the cars during the changes. (a friend of mine for years swore by flashing tape, until he went halves on a pack of MaxMat with a friend on his for his latest car). I was not criticising Flashing tape (bang per buck it is still very effective) but I know after putting in just one layer on my doors I was starting to lose my sanity! A van however, with free flashing tape certainly sounds like a good scenario though ![;)](//storage.proboards.com/forum/images/smiley/wink.png) . Matt, that stuff will be OK, but Butyl based deadening IME is more effect (but also more pricey....). Are you looking for it so as to make the Covin quieter? I would not underestimate other cheap avenues like carpet underlay though ![;)](//storage.proboards.com/forum/images/smiley/wink.png) .
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Last Edit: Dec 3, 2013 23:59:55 GMT by ChasR
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All the reviews I've seen suggest that butyl-based products are superior to bitumen-based ones in most respects. The thing is that bitumen just adds mass to the panel, which reduces the resonant frequency, while the flexibility of the butyl combined with the mass of the metal means it acts as a constrained-layer damper, reducing the amplitude of the vibrations. You can get butyl-based flashing, but it's hard to find. Loads of information here, which seems very sensible from my basic understanding of acoustics. ![;)](//storage.proboards.com/forum/images/smiley/wink.png)
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ChasR
RR Helper
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Posts: 10,201
Club RR Member Number: 170
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sound deadeningChasR
@chasr
Club Retro Rides Member 170
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He also sells his own deadening does the Sound Deadening Showdown. It is proven though ![:)](//storage.proboards.com/forum/images/smiley/smiley.png) . You are quite right though James, adding mass does go a long way in reducing the noise and reasonance , although there are other factors to consider. I am a little biased (I have only ever used two products personally (flashing tape from Wickes and SecondSkin Damplifier Pro (It seems this is now unavailable in the UK due to import duty). Silent Coat seems to be a good alternative mind you without the pricetag of Dynamat. As for the link, some of the info is hard to follow, but it pretty much sums up my findings. Quite a few chaps on that link (VD, mulletboy2 and zimsounds) have played around with many types of deadening over the years, from flashing tape to fancy products in addition sludge like coatings which promised alot, but failed to deliver. www.talkaudio.co.uk/ipb/index.php/topic/38988-dynamat-xtreme-vs-marley-sealant-tape-mathematical-comparison/page-2Matt, you do know that the metal backings will wear quickly in addition to getting some deading mess on your feet (well, heel)? The foil is handy for not getting the stuff on your hands, hence making far easier to put down. (the mess from SS Damplifier Pro was more than when I put flashing tape on the roof, with it being a royal pain to remove in one go). I still have half a box left of which I can give you a sample to give you an idea of what the foil is like ![:)](//storage.proboards.com/forum/images/smiley/smiley.png) .
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Last Edit: Dec 4, 2013 0:03:52 GMT by ChasR
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He also sells his own deadening does the Sound Deadening Showdown. It is proven though ![:)](//storage.proboards.com/forum/images/smiley/smiley.png) . True, but not many other vendors go to the extent of spelling out what each bit of the system does, nor do they suggest sourcing major parts of the system locally to save on shipping. ![;)](//storage.proboards.com/forum/images/smiley/wink.png)
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Matt, that stuff will be OK, but Butyl based deadening IME is more effect (but also more pricey....). Are you looking for it so as to make the Covin quieter? I would not underestimate other cheap avenues like carpet underlay though ![;)](//storage.proboards.com/forum/images/smiley/wink.png) . i'll need to put plenty on the rear bulkhead to keep the engine noise down and will also do the floorpans too to stop any drumming. as i wont be using carpet for a while i figured some shiney sound deadening would tidy up the interior.
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sound deadeningfr€$h&m1nt¥
@freshandminty
Club Retro Rides Member 99
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There's a guy on talkaudio that sells it for a good price - user name loudboy iirc
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ChasR
RR Helper
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sound deadeningChasR
@chasr
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Darren's (Loudboy) stuff is not bad at all, and has been used to great effect. On the bulkhead it would probably do the job just fine. But it also has no backing, which may make applying it to the floor a bit of fun.
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Just ordered that one. Postage is quick (3 work days). It probably not a nicely packaged as a Dynamat would be. It is folded into a package of 300x190x60mm. So, I guess on large flat surfaces you will see the folds. It is shiny, though. And it looks sticky enough to me. Frost Auto Restoration Techniques do also a sound deading kits with a brand, although cheaper than Dynamat. It is still twice as expensive as the E-bay kit.
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