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Old 01-22-2013, 07:37 AM   #31
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

Tango

Thats a good idea on the seam sealer. I have used it in car restoration in the past. When you said do a mix of thermal and acoustical ..... are you meaning to use the hytec product? I think its a good one from what I read. As said I was going to seal that up and pack the pocket full of polyiso rigid insulation to muffle any vibrations and sound as well as keep the hot and cold in their proper places. I am planning on using that product on the roof for sure to keep the heat off the top of the roof.

When I did drive it back from the purchase it was like a floor full of silverware vibrating at level 11. It was horrible but the skins were not very well riveted but Ive removed that as a problem.

Thanks for your input.
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Old 01-22-2013, 09:46 AM   #32
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

Hey Bapos --- Having seen (and felt) the HyTech beads in action during August here in Houston, I've decided to paint a layer on the inside of all the skin I can reach, then also add it to my primer on the outside. The top will get yet another coat mixed into some roof sealer. But the HyTech beads function only as a thermal barrier. Once the inner panels have it on I will lay on some sound attenuating material to minimize the vibration of the sheet metal. My old 40' Blue Bird never got anything added and all the surface area resonated horribly. Due in part to the DD 6v53 "Screamer" that pulled it, but I don't want to live inside a giant speaker box ever again.
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Old 01-23-2013, 07:33 AM   #33
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

Tango

Your plan pretty much sounds like mine. I know your going to use beads on the inside and outside but what are you going to use for a paint on the inside? A primer or what? Thats what Im curious about. I think using something that will can be used as a vapor barrier would be best in my case. Thats why the lizard skin looks like a very good product for this as it is used as a sound control and it seals up?

Let me know your thoughts.
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Old 01-23-2013, 10:30 AM   #34
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

Hey Bapos --- my understanding is that Lizard Skin is simply a pre-mixed paint product that contains the same or similar ceramic beads as the HyTech material. I do know that Lizard Skin is water based so it's likely some form of acrylic paint, but no idea what the bead content might be. I also know that it is very pricey. Several times what mixing your own costs. HyTech also offers a variety of pre-mixed paints with the beads for various applications and their aluminized radiant barrier product is what I plan on using on the inside and possibly as a base for the roof. It's about half the price of the Lizard Skin. I already have several pounds of the beads for mixing with roof sealer.

I can't comment on how the Lizard Skin performs but I have seen the HyTech in action. Fellow here in Houston mixed the beads (not sure what rate) with cheapo HD latex house paint and put two coats on the inside of the corrugated metal roof on his house...a converted 1920's steel framed industrial tin building. It was well above a hundred that day but when I put my hand onto the inside of the roof it was almost cool to the touch. No other insulation. Sold me on the spot.

And while Lizard Skin does claim some acoustical dampening properties, I have to question that aspect. The only proven way to bring down the kind of resonant frequencies (aka; noise) associated with vibrating sheet metal is to add mass. There are a number of different products available that do a pretty good job but the best seem to be those that employ barium loaded vinyl and have a mass of about 1 pound per sq. ft. It is available in thicknesses from about an eighth of an inch to over an inch. I used the thick variety on the inside of the doghouse of my Blue Bird and it made a big difference but I never got around to adding any to the rest of the sheet metal. On my Shorty I will do just about the whole bus. Under the hood, both sides of the firewall, the floor and everything else I can get to. The little Cummins diesel I'm installing is affectionately known as the "paint shaker" for good reason and I want to minimize the resonating effect on the sheet metal as much as possible.

You can check out HyTech's stuff here... http://www.hytechsales.com/
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Old 01-23-2013, 11:11 AM   #35
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

Interesting: Hy-Tech Bus Kote #2150
Bus & Recreational Vehicle Coating

Bus-Kote is a bight white, acrylic elastomeric, insulating ceramic, waterproof coating designed specifically for Buses and recreational vehicles. This high build rubber like coating waterproofs, insulates, soundproofs, beautifies and protects with a ceramic shield that expands and contracts with varying hot and cold temperatures plus resists thermal shock. Bus-Kote offers superior mildew resistance and ultraviolet ray reflectivity.

Originally designed as an insulating, reflective coating for school districts to use on the roofs of school buses to lower the interior bus temperature. This energy saving coating will reduce interior temperatures when hot and make interior temperatures more constant when cold due to ceramic insulation. formulated to resist over 100 m.p.h. wind driven rains. Hy-Tech offers a 5 Year Limited Warranty when applied according to our specifications.
This easy to apply maintenance free coating will provide years and years of durable, insulating protection and outstanding beauty. ( For the ultimate in roof coating protection we recommend a top coating of Flexi-Clear, an elastomeric crystal clear coating that is designed for protecting paint finishes.
Flexi-Clear is completely non-yellowing, highly resistant to water, road salt, tar, oily grime and its natural hydrophobic film is easy to clean and maintain.)
Bus Kote Coverage: 125-150 square feet per gallon.
Available in 1 Gal, 5 Gal, and 55 Gal drums
$39.50 Per Gallon...5 Gallon$197.50

My question was one gallon would do the roof? hmmm.. mine would be approx 255 sq ft. so 2 gal.? Additive for 1 gal is $13.95.
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Old 01-24-2013, 10:13 PM   #36
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

isnt the Hy-Tech Bus Kote suppose to be used for exterior use?
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Old 01-25-2013, 08:37 AM   #37
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

Quote:
Originally Posted by bapos
isnt the Hy-Tech Bus Kote suppose to be used for exterior use?
That is my understanding, I think the main property is reflective. I see there are people have used it inside of their whole bus. To me this seems
quite expensive. Anyone who has done this have any thoughts?
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Old 01-25-2013, 08:46 AM   #38
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

We have been using bus-kote for about 10 years. It works great. We have 2 coats on the ceiling and 4 coats on the roof. AND the beads are mixed the the exterior silver paint. It has the feel of sandpaper.
One thing to remember is that you must use the clear coat when using it on the roof. It is very chalky and will run and streak down the side of the bus. Even the unclearcoated edge of the bus-coat where the tape was. The next time I paint the roof I will paint the bus-kote, take off the masking tape and retape it to make sure the edges of the bus-kote are painted with the clear coat.
Good Luck
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Old 01-25-2013, 01:30 PM   #39
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

I'd like to spray what ever compound I use to ensure a good even coating to seal it up. I have a paint sprayer....paint gun and a 80 gallon compressor.. or will get whoever bus needed to spray it. Let us know what you used to seal it up on the inside
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Old 01-25-2013, 01:58 PM   #40
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Re: 1983 GMC Ward 66 passenger (Bigasspimp Mobile)

I don't think you'll get it through a air spray gun. I used a HF airless. Nozzle plugs often, just turn it around with the lever and blow the clog out.
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