Under carpet sound deadening / proofing suggestions

[decampos]

I pulled the sound deadening material out from under the carpets in the old Mercedes as it had absorbed a surprising amount of rain water. I clearly have a leak to address. Can anyone recommend a source for a replacement? I'm looking for something that won't soak up moisture like a sponge. The 'closed cell' products advertised on Ebay tend to be only sold in small sheets. Kind of needs to be available in a large sheet/mat. Any pointers very much appreciated.

[decampos]

Thanks for the reply guys. droopsnoot, yes, the water absorbency is my concern also. I just had a look at the seller 'dobble0_0' on ebay. His products look very suitable for what I'm after. Are you happy with what you bought?

v8250, I am interested in Dynamat, but after doing a bit of research, maybe not for this application. Thanks anyway though.

[decampos]

droopsnoot said:

Yes, I'm happy with it. It didn't silence the car (but then nothing will do that), but it did the job.

Great. Just ordered 'soundproof thermal insulation sheet. 2mtr x 1mtr x 20mm thick'. Cheap enought to give it a shot. Thanks again.