I want to put some sound-deadening mat in my CRX, which already has factory rubberized stuff sprayed onto the floors. Do I have to chip this stuff up or will the aftermarket mat adhere right over it?

 

If you go to best buy and get dynamat it will just stick richt over it. It is a sticky rubber compound with and aluminium cover on it. honestly youf factory suff isnt really going to matter now because of the age of it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alex801to410 &raquo;</TD></TR><TR><TD CLASS="quote"> honestly youf factory suff isnt really going to matter now because of the age of it.</TD></TR></TABLE>

Bullshit. Everything helps, regardless of age.

RiskEverything: Leave your factory sound deadening in place.

 

I would apply it on top of the stock stuff. Just make sure your roll it on there good with no air gabs or anything like that.

 

I have to agree, as long as you clean the surface, [stock dampening material] your covering, there is no reason to remove it.

However, if the stock dampening material is loose, cracking, brittle and easily removable, then you will have to remove it, dampening materials, like Dynamat, are ineffective if the do not bond to the metal you are trying to dampen and areas of stock dampening material, [covered with other dampening material] that has delaminated from the metal will resonate against that metal.

More then a few times I have had to remove aftermarket dampening materials because it was improperly installed over loose stock dampening material, by the customer or other shops, a costly mistake. 94

 

like everyone else said keep the stock deadening stuff and just apply new stuff over it