Practically Classics Forum

Hello All,
Apologies if this has already been done to death, but a quick search didn't turn up a dedicated thread.

Has anyone got any recommendations for sound proofing material? There seems to be a few options out there in terms of material. I need to do my bulkhead, transmission tunnel & floor areas.
Thanks,
Paul.

I have used dynamat to replace the "bitumen" type sound deadening I removed from the RR. No comments on how well it works yet but it is really easy to fit. There are lots of "almost dynamat" type products on ebay that are pretty cheap.

I used the solid rubbery stuff from Frosts (can't remember exactly what it was called) and it seemed pretty good, although to be honest to put it mildly it's a bit difficult judging the effectiveness of sound deadening in a Midget.

I bought some imitation stuff on eBay the other week and it should do the Land Rover's bulkhead nicely (I'll need a lot more later on!!). he stuff I got was closed-cell neoprene and is waterproof and, allegedly, fire-retardant.

This site was useful for reminding me that it is difficult to make the Landy as quiet as the Golf,they do "Silentcoat", which is supposed to be the canine's testes:

http://www.deadening.co.uk/

There was another useful link on my "main" PC, but I'm using the notebook and the network is switched off!

" B&Q Flashband" is cheap and effective . All the vw T4 surfbus builders use it . Stops all the drumming on large panels

The flashband sounds like a good idea for some of the noise! That will work like the bitumen "pads" that are put on large panels (doors, roof, boot and bonnets etc) to stop resonance. There are very clever people who can work out how big the pad needs to be and where it needs to be stuck on the panel for maximum effect!

There are at least four "noise problems": resonance (especially in vans), reflected noise (again, more in large open spaces like vans), noise produced by engine/gearbox etc and wind noise. You can see I know little about it from my terminology and, of course, the Land Rover suffers from all three - in Spades!

Obvious things to check are holes through the bulkhead and other panels into the passenger area (the Landy has many of these) and gaps between the door seals etc (what door seals?). Then work out what large panels resonate (or, in the Landy's case - which panel doesn't) and fit some pads. Then put the neoprene foam on everything that hasn't got good insulation - over the pads and some more under the carpets etc. I think some of the foam looks a little like carpet when it's in place, but the stuff I bought just looks like black rubber, so I intend to put something over it (to absorb reflected noise).

I do have an alternative though - there are some good kits for Land Rovers! The problem is that they are somewhat expensive at around £400 and only do the seatbox, cab floor and bulkhead!

Great stuff. Thanks folks! I think I'll be lining everything I can see in several layers of stuff!!

It depends how much it matters to your application but don't go too overboard or you can find your carpet not fitting correctly over the top. It will be quieter adding more but it will also add more weight which will hurt your fuel economy a bit.

Turn the radio up!

I'd try that with the Landy, but need a much bigger alternator to power the 1kW amplifiers!