Thread: Dynamat a 90 - how much will I need?

Originally Posted by Toxic_Avenger

How heavy is this dynamat?

It's very heavy, I had a quick look on there web site but can not find the weight .

If I did end up using 3 or 4 boxes ( I truely can't remember) then the weight would explain why my Defender is so slow!

I found the Dynamat roller very handy when applying the stuff. Even used the wooden end of the handle for corners etc.

AlecW- The roof lining was a real PITA, I'm not sure if the way I removed it was wrong or there is an easier method. I had to kind of bend/fold it for it to fit out of the back door (without damaging it).
While you have the roof lining off, apply some type of insulation in addition to the dynamat as that will make a difference with heat from the sun getting in the Defender.

I looked into dynamatting and found people recommending roof flashing as a cheap option, so i picked a 5m roll up for about $60 and put it on a few panels.

Thought it was worth a shot seem it was made of the same stuff as the jaycar sound insulation that seems to get good reviews (Its called butyl i think and doesnt smell as much as tar based ones).

It has removed rattles in panels and some droning but if you want to remove road noise and engine noise it needs some other layers of insulation, like closed cell foam or mass loaded vinyl.

If the dynamat works on the same concept as the jaycar stuff (By just adding mass) you only need to cover 20% of each panel.