Since my last build, I've been doing a lot of research on different types of interior sound deadening/thermal coatings. I decided on this truck that I would not do the Lizard Skin coating like I did in #1. No real reason other than I want to try out some different coatings...maybe have an alternative to offer our clients.
I think Lizard Skin did great in #1.....that cab is always very cool inside and sound deadening is pretty good(although I have nothing to compare it to). Being that #2 will be a diesel, I think trying to get rid of as much sound as possible will be smart. Insulating the cab is also very important.....I think Lizard Skin did a killer job with that.
For #2, I decided to go with Second Skin Audio's products. (
www.secondskinaudio.com) They have an excellent tech guy there....extremely helpful and always willing to answer my questions.....and I ask a lot of them.
I'll be starting with their Damplifier (
Products - VIBRATION DAMPERS - CLD * MADE IN THE USA * - Damplifier™ - Second Skin Audio) product....a Constraing Layer Damper(CLD). Basically a butyl type stick on sound deadener, 1mm thick(they offer a PRO version, 2mm thick) is what I will use in certain areas, 2mm in others.
I started with the roof and the 1mm Damplifier. I will be spraying their Spectrum (
Tomb like silence & luxury car quiet with Spectrum™ | Hot Rod noise reduction | Second Skin Audio, Made in the USA.) spray in sound deadener on top of this....2mm thick to achieve 3mm total. Spectrum is a CLD like the butyl stuff but not as heavy and apparently more effective. I'm sure it's the typical latex coating with microspheres....just like Lizard Skin. Interesting that the butyl goes UNDER the coating. "Sandwiching" is what they call it in the biz.
On top of that, I will use their Heat Wave Pro (
https://store.secondskinaudio.com/heat-wave-pro/)...a lightweight jute material sandwiched by foil. Controls heat and deadens sounds that aren't dampened by the butyl/spray on stuff. Also can be compressed to fit under panels(like a headliner).
None of this stuff is anything new.....I'm sure there are plenty of ways to do it cheaper. I like ordering from one place and when they have great customer service and technical assistance, they get my business. We'll see how it does in #2....
Started with a super clean roof. It's easy to get spoiled with these new cabs. Basically zero prep. Last one we did was in my 45LV....pretty much as bad as it can get.
This back wall is a challenge(for me at least)...I love the corrugated exposed painted metal but it's horrible for road noise. I think this truck is going to get a grey carpet on that back wall(maybe vinyl?)...I'll coat this area with butyl and spray in deadeners INSIDE the truck...then I'll do spray sound deadener top coated with bedliner on the outside.
1mm stuff was easy to work with overhead. I think I'll do the 2MM on the floors.
Their Damplifier is ready for spraying the Spectrum on....does not need to be scuffed or prepped. Just tape things out and give it a spray.