increasing sound insulation?

[mhkritzinger]

Originally Posted by swidd

The rubber stuff: yes, spray it on the inside of the wheel wells, on the metal thin surfaces that cover the tires (I spray the plastic parts and suspension too, but I'm not doing it right). Be careful not to spray on the exterior paint, but hold the can far enough away to get a nice spread. Shake the can very hard for the specified time - otherwise you just get paint and glue and no rubber. Use rubber gloves or hold the can with a trash bag; it gets messy.

The difference between dynamat and b-quiet or peel and seal is not appreciable. The material is essentially the same, short of a few m.m. difference in thickness. As your stuff will be way cheaper, you can just do double layer in the middle sections of the surfaces you cover. It has nothing to do with the material really - dynamat for $600 isn't magic or superior - it is all about adding mass to prevent the sheet metal from vibrating, while getting a good glue that will permanently stick even in rain, sun, winter and extremes of either. Use a roller to press the stuff into edges and get a good stick. I think good results are more about patient and thoughtful install than thickness of the material. If you want it even more quiet, get foam, like a foam mattress, and stuff it into the door frames.

thanx for all your help! I appreciate it allot! When it comes to the thickness of the material does it really make a difference or at what kind of thickness should i look at and what thickness will be sufficient?

Another question i got is i heard about you must add a barrier and people uses mass loaded vinyl(MLV) for the barrier but you don't get stuff like that in South Africa. Is their any alternative to that?
sry for all the questions but you can't give me any pointers on where is the best places to put the material and any advice on the placement will be welcome?
I also read about this peal and seal stuff can get smelly when the temperature goes up in your car?? Is that why you said i should not buy an asphalt one?

Thanx allot so far!!