Here at Heatshield Products, we’ve heard just about every sound-deadener myth (and lie) there is. The heavier the deadener, the better. Two layers are better than one. The check’s in the mail.

So, it’s time for us to set the record straight on the five most common myths:

Sound-deadening material has to be heavy and thick in order to work well. This simply isn’t true! Heatshield Products makes decreasing the unwanted sound and noise in your hot rod, classic car or off-road vehicle easier than you might think! We focus on the science of reducing unwanted sound and noise inside a vehicle, not simply applying the heaviest material possible to suppress vibration. For example, db Armor™ is 20 percent lighter than competing damping sheets, yet is three times more effective at decreasing sound and noise!

Sound deadener can't be removed once it is stuck to metal. The modern adhesives that we use keep sound deadener, like our db Suppressor™, in place, but you can lift and reposition the material during installation without ripping or destroying it. The adhesive only needs to be sticky to hold the product in place on the substrate, letting our advanced material reduce sound-producing vibration.

Only 25 percent of surface has to be covered. Wrong. Sound dampers need to cover at least 50 percent of the vibrating surface in order to be effective, and 75 percent coverage will yield better results. Meanwhile, 100 percent coverage will maximize sound-deadening performance. If you are not planning to cover 100 percent of the surface, start from the center of the panel and work toward the outside edge.

Thicker sound-deadening material works better. This one is also a case of old versus new technology. Sound deadeners from Heatshield Products are thinner yet do a better job of controlling sound and vibration than competing brands. A thinner sound deadener has several advantages. It is easier to work with – from cutting the material to pushing it down to matching the contour of floor pans and other areas. It also reduces the amount that it pushes up the carpet. Plus, thinner material makes it easier to reinstall everything, from consoles to seats.

Overlapping and double-layering does a better job of sound deadening. Do not stack layers! This is a waste of time, money and material. Because of the way sound deadeners from Heatshield Products reduce sound and vibration, only one layer is required to effectively dampen a panel.

Here’s a bonus myth busted: Stick-on sound sheets stop heat. While they may temporarily slow the rate of heat transfer, they will become heat soaked during the normal course of driving. One exception is HP Stealth Shield™, which we designed with proprietary technology to reduce both heat and sound. It mounts inside your vehicle atop the floor or sound-deadener product to protect you from heat radiating from the engine and exhaust.

You can find more sound deadening tips and learn more about Heatshield Products sound insulation products by clicking here.