GCncsuHD
Junior Member
- Joined
- Aug 22, 2010
- Posts
- 21
- Reaction score
- 5
- Location
- Salisbury, NC
- First Name
- Garrett
- Truck Year
- 1967, 1969, 1978
- Truck Model
- C10, K5, K30
- Engine Size
- 5.3L, 350, 350
Lizard skin and Dynamat work differently. Normal dynamat works only by mass dampening the panels, like you did with the doors, by lowering the resonant frequency of flat panels. Materials with a lower resonant frequency take more "power" to vibrate and cause noise, therefore it will absorb low frequency noises such as exhaust resonance, heavy hits (like the door shutting), loud subwoofer speakers, etc that would cause the panels to vibrate. Dynamat doesn't do well to insulate against heat and higher frequency noises like road and wind noise since it is just a solid mass dampener, although dynamat does make other products for that. To insulate against that you need a material with an air gap such as the foam insulation or carpet padding I used. Lizard skin works by suspending small hollow ceramic spheres in paint, when it cures you are left with a thick coating with air gaps in it that does well to insulate, and inherently with the thickly applied paint it will also mass dampen the panels like Dynamat, although not as effectively, although, again, Lizard Skin does make a formulation that is heavier to be applied before, and in combination with normal Lizard Skin to take care of both dampening and insulation.
So basically, there are plenty of ways to skin the cat, weigh the options and the prices. For me, I feel I got a good value for my dollar, although like I said in the case of our 69 K5 I intend to apply lizard skin as an undercoating to block heat while we will be bedlinering the floorboards to mass dampen and protect the floor (gonna be a beach/offroad rig). And my 67 will likely get a combination of the two.
