How good is stuff like K&H or Septone spray-on sound deadener? I think thats pretty cheap if your thinking of a spray-on kinda product? I guess personally I'd still use roadkill or g-spot or something on the inside but that K&H/Septone kinda stuff is meant to also help prevent stone chips etc. as you spray it under your vehicle on the underside of the floor and can also use it inside doors etc. I believe. I'm sure it's good at stopping stone chips and corrosion etc. but how effective as a sound deadener would it be even if you just used it underneath your car? Might be an option.
A cheap alternative i found was carpet underlay, i got a heap of it for free when ppl i new got new carpet and the old stuff was replaced.
i just used liquid nails to glue it to the inside of doors, boot lid to stop the bass rattles and anywhere else i wanted it. worked well for me mite be a solution your too.
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