VB-3 is a composite product that has been engineered to block and reflect high energy, low frequency road noise, an airborne sound, across a wide frequency range. VB-3 consists of two 1/8" layers of closed cell neoprene foam that sandwich a 15 mil thick lead sheet.
How does VB-3 work?
One of the neoprene foam layers will create an "airsping" that floats or decouples the dense layer of lead. It is this airspring that allows for the reflection of high energy soundwaves and prevents the sound energy from passing through the dense layer. The foam layer does not absorb sound nor does it "filter" because it is far too thin to absorb high energy, low frequency sound waves. Be wary of any company that promotes a barrier material in this way.
Conversely, VB-3 will prevent sound energy from escaping the vehicle which may be of particular interest to those of you who compete in car audio competitions.
Where do I use VB-3?
VB-3 is a highly formable, moldable product and is well suited for use over highly irregular surfaces such as the transmission tunnel and over wheel arches.
Often times when a material is introduced underneath the carpet kit, problems will arise when the center console (if applicable) is installed. VB-3 will prevent any fitment issues that come up because it forms to and hold the shape of the sheet metal surface below.
Before you place an order for floor barrier materials, always take time to examine the padding material below the carpet. Some vehicles (i.e. Mercedes, BMW, Toyota Supra) have a molded foam backing that causes the carpet kit to fit precisely onto the floor pan. If this is the case with your vehicle, consider using VB-3 exclusively as it will form absolutely to the shape of the floor pan and the carpet kit will then fit perfectly.
Otherwise, VB-3 is the most expensive of the barrier products we offer which is why we recommend using it only where absolutely necessary.
Why should I use a floating barrier and not multiple layers of a vibration damper?
A common misconception is that vibration damping sheets are designed to block road noise, an airborne sound problem. Although this technique can yield a reduction in the overall noise floor, it requires 4-6 layers of material which will increase the cost, installation time and dramatically increases the amount of weight added to the vehicle. Save yourself a lot of time, money and hassle by using a dedicated "floating" barrier material first.
VB-3 weighs 1lb ft² and is equivalent to 6 layers of a vibration damping sheet.