Kind of DIY questions re: Sound deadening

[DAZ]

Hi, I have done a lot of research on this, and searched this forum aswell as others, but still have a question…

I wanna do it cheapo So I am going for ‘flashing tape’ or the ‘Aqua seal’ stuff… Went to my local Wickes and B&Q last night but came away completely confused

The ‘Aqua Seal’ stuff seams appropriate but one side is tacky black stuff and the other side is rough and has lots of little ‘sandy’ bits on it, I can imaging that being a lot of good in the door of a car… So am I missing something? Is there a particular type I am meant to get?

The ‘Flashing tape’ just appears to be lead on a roll to me how are you meant to stick this on your door?

Thanks helping a complete ‘numpty’ like myself

[Dr Zoidberg]

They do some hi-tack (thats what it says on the label) tape which is sliver foil backed and the heavy black sticky tar like stuff on the other side. It's in a different place to the other ones in the store though.

I used a roll of it (10m * 100mm) on my car port at the weekend , but I can see that it would work well as a cheap alternative to dynamat

[HellFire]

How expensive is dynamat? I hear that the best place to deaden the sound on a Fabia is in the footwells and on the back of the wheel arch liner, that way a majority of the sound is cut out but you can still hear the engine when you need to.

[Lummox]

A quick Google search turned up this....

http://www.caraudiodirect.co.uk/prod...oducts_id=2771

[WW_VRS]

I'd give the Soundkiller guys a ring, they know what material you'd need, how much it would cost and where you can save your dosh

[Grant]

I've used a Dynamat Xtreme bulk pack on my Fabia (9 sheets) cost around £150, and it works wonders! I've added it to the boot/wheel well, boot lid, under the rear seats and front doors (heavily). I shall be adding more once funds allow.

[150HP&counting]

Wickes "flashing tape" is an excellent product(cheap too), although you will need to apply probably at least two layers, maybe more. Dynamat does seem the popular choice if money isnt an option though.

Hope it helps
Lee

[JUT]

Originally Posted by 150HP&counting

Wickes "flashing tape" is an excellent product(cheap too), although you will need to apply probably at least two layers, maybe more.

What he said - I have a combination of the following:

Flashing tape all around boot area, 2 layers
Flashing tape on inside of door skins
Silicone sealant on all plastic clips in doors
Felt (jute) sound insulation mat on sides and floor of boot, under rear seat, and the cabin side of the firewall, plus wherever I could fit it behind the door cards.

Cuts down the diesel clatter a treat, I have virtually no rattles and the sound from the sub is nicely oik-proofed and contained within my car so as not to attract attention.

If you want a happy medium between pikey stuff and pricey dynamat, the felt is good at about £15 for a 1m x 1.5m roll, or alternatively:

http://www.bodyshopwarehouse.co.uk/d...=1&prodid=2655

This place does a product very similar to dynamat but cheaper - 10 panels 20cm x 50cm for £13.34 exc VAT. Delivery's a bit steep though - so not really ideal unless you're buying a ton of it or thinking about doing a group buy...

[Akebono]

Ok, flashing tape. Seems to be something similar to dynamat. Dynamat, from what I've read about it contains something like tar, so it's heavy and blocks vibration. Flashing tape also contains something like this, but it's quite narrow. How did you apply it? Stripe near stripe? And even two layers? It seems a lot of work but it can work great for taking out vibrations, how about road noise? I know that for road noise and sound insulation some other type of material is used. Fabia has it in the trunk and on the wall between the engine room and the interior. It's something like cotton, very dense and rough.

How about isoprene mats? I how I wrote it correctly. Its the mat that it's used unter the sleeping bag whenever sleeping in tents. It blocks temperature and water but because of it beeing dense I guess It can help for sound insulation also especialy on floor and wheel arches. I know some people who used it on the hood with good results for sound, but I think it's bad to use it there since it will also keep the engine hot.

[JUT]

Originally Posted by Akebono

Ok, flashing tape. Seems to be something similar to dynamat. Dynamat, from what I've read about it contains something like tar, so it's heavy and blocks vibration. Flashing tape also contains something like this, but it's quite narrow. How did you apply it? Stripe near stripe? And even two layers? It seems a lot of work but it can work great for taking out vibrations, how about road noise? I know that for road noise and sound insulation some other type of material is used. Fabia has it in the trunk and on the wall between the engine room and the interior. It's something like cotton, very dense and rough.

How about isoprene mats? I how I wrote it correctly. Its the mat that it's used unter the sleeping bag whenever sleeping in tents. It blocks temperature and water but because of it beeing dense I guess It can help for sound insulation also especialy on floor and wheel arches. I know some people who used it on the hood with good results for sound, but I think it's bad to use it there since it will also keep the engine hot.

Flashing tape is cut into strips or squares, heated with a hot air gun and then pressed into place. A wooden wallpaper seam roller is good to stop you burning your fingers! it's nasty stuff to use so best to wear gloves - it sticks like crazy and the foil backing is very sharp once cut to shape so it can get you if you're not careful. I don't know about isoprene mats - neoprene or similar would probably block some road noise but would not be very dense so would not do a great job of killing vibration, plus due to lack of density you'd need a lot of space to apply more than one layer. Road noise is reduced with all these measures but the weak spot on the fabia is the tyre / suspension setup - this is where most of the noise comes from and difficult to deaden. I notice it more on mine now becuase the road noise from other places has largely been eliminated by the other measures I've taken above. Oh well, new monster amp and sub going in shortly, that'll take care of it