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Old 12-04-2020, 11:28 AM   #1
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1964 22' Safari
Huntsville , Alabama
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Line-X on Interior side of exterior panels?

I've seen threads on using line-x coating as a rock guard protectant on front panels, but I'm wondering about spraying linex on the interior surfaces of a gutted Airstream(the interior faces of the exterior panels) The stuff is super strong, would help somewhat with insulation and should do the trick to prevent leaking... a sort of interior shell. I believe it would prevent the exterior skin from denting in a hail storm as well, the military uses it to reinforce tank and buildings...



Im in the middle of a restomod which I intend to use and keep for the next 20-30 years, and dont want to be fixing a leaking trailer, thinking this could do the trick.



If there is already a thread addressing this specific question please advise.


thanks,



-C
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Old 12-04-2020, 11:53 AM   #2
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Interesting idea.

When applied at 1/8" thickness, LineX weights about 0.7 lbs/ft2. Depending on how thick you go and how much area you cover, you could be looking at a lot of dead weight eating up your payload capacity.

In your case, how much weight would you be adding if you did something like this?
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Old 12-04-2020, 12:09 PM   #3
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modesto , California
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Hello and welcome fellow 64 Safari owner.

First while the inside skins are off look for the tell tail signs of leaks. At each rivet look for oxidation and a trail down the inside. Re-buck as needed to seal the joint.

But...IMO Line-X would be great to seal the rivets and seams inside plus help create a thermal barrier between the outside skin to reduce condensation and on the ribs for the inside skins. A win-win in my book. As stated above, watch you weight. I boxed in my frame and got a little heaver axles (w/disc and 2" lift). Not worried about extra weight so much.

I did something similar, however I used a special ($$$) brush on German sealant I got from a friend. After re-bucking, I just did the rivets and seams. I wish I could have sprayed the whole thing.

All that being said, I think it is very important to seal from the outside as well as you can with captain tolly's, Parbond, TremPro, Sikaflex, etc.

Good luck and Photos please.

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Old 12-04-2020, 12:15 PM   #4
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1964 22' Safari
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jaybauman,


My initial rough estimate for my 1964 Airstream surface area would be an additional 300-350 pounds of weight.



I'd also need to check on Line-X gassing off in the cabin, (see FEMA toxic trailers...) Will need to check with them and do some research.


-C
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Old 12-04-2020, 01:42 PM   #5
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NO..I see no positives.👎

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Old 12-04-2020, 02:02 PM   #6
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Originally Posted by ROBERT CROSS View Post
NO..I see no positives.👎

Bob
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Hi Bob,


What negatives do you see with this idea? I'm a novice in the Airstream restoration world and would appreciate hearing your specific concerns?


thanks,


-C
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Old 12-05-2020, 01:46 PM   #7
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IMHO Line-Ex would be as troublesome as Vulkem to deal with in the case of repair/repacemnt of panels that have it applied.
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Old 12-05-2020, 04:18 PM   #8
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Two rumors I've heard:
1. Extra weight
2. If the Line-x chips or peels, it will hold water.

Like I said, just stuff I've heard. I have no experience with it.
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Old 12-05-2020, 07:38 PM   #9
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My buddy, a body shop Owner, recommended never using a spray- on liner. They are an incredible pain to deal with when repairs are needed.
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Old 12-06-2020, 08:04 AM   #10
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Quote:
Originally Posted by cbt0011 View Post
Hi Bob,


What negatives do you see with this idea? I'm a novice in the Airstream restoration world and would appreciate hearing your specific concerns?


thanks,


-C
The biggest possible problem, would it stay put?
The bed of a p/u truck is a lot less flexible the thin skin of the AS that is constantly flexing. So much so you can hear it 'oil canning' as the sun warms the skin on a cool morning. That and the weight and the fact it hardens and chips as it ages. There are many modern composite 'wool' alternatives available, better performance & lighter.

Bob
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Old 12-20-2020, 10:58 AM   #11
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I would not apply LineX to the interior surface of any panel. Background:


I have been in the aircraft overhaul business (and writing technical/conformance requirements) for over 20 years dealing only with large multi-engined, heavy aircraft.



In any heavy aircraft, the principle drivers for overhaul are airframe age (fatigue) and airframe corrosion.


Over the years, i have been involved with many experiments with coatings on the interior surface of aircraft panels to prevent or slow corrosion damage.


Many years ago we used a coating that had similar physical properties as LineX minus the hardening/cure. The problem with this sort of coating is that in addition to the weight issues previously mentioned here, there is no way to detect corrosion growing beneath a LineX type coating. The use of this coating would most likely result with the first indication of corrosion damage resulting in a bubble/hole in the panel on the exterior surface of the panel as there is no way to inspect through the coating. Not good.


If one decides that the interior surfaces of the panels need to be coated, I would only use a coating that completely seals the surface area from moisture, contaminants, etc. and that is transparent to the naked eye where corrosion damage can be detected as early as possible via a simple visual inspection.


There are some aerospace products out there that provide this degree of flexibility but none are cheap.


Hope this helps.
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Old 12-20-2020, 11:02 AM   #12
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Wouldn’t use LineX. We have it in the bed of a truck and Raptor liner on our Jeeps. Both great for exterior use. In our 1963 Overlander Full Monty, we sprayed Lizard Skin Ceramic Insulation at the suggestion of a friend that restores vintage vehicles. Happy we did! It covered pre-caulked seams nicely and we are very pleased with this product.
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Old 12-20-2020, 12:28 PM   #13
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Quote:
Originally Posted by MINICS04 View Post
Two rumors I've heard:
1. Extra weight
2. If the Line-x chips or peels, it will hold water.

Like I said, just stuff I've heard. I have no experience with it.
My previous Sierra, I had the bed lined with Line-X, loved it. I don’t think you could get Line-X to chip and peel. With that said, it is different than other brands: a coworker had Rhino-lining in the bed of his truck, and yes, it did have spots where it did start to peel. For the interior of an old Rover, I used some DIY lining, and it worked okay, but, is ‘not’ as good as genuine Line-X.

With all that said, I don’t think an AS is where Line-X is needed... it gets towed somewhere, parked, then towed somewhere else. Line-X is great at taking the abuse that a pickup bed receives. But I’ll agree, it has some heft to it, isn’t what I’d want to add to an AS.
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Old 12-20-2020, 01:28 PM   #14
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One thing to consider: AS skin is more flexible than truck bed panels. I’d wonder how line-x would hold up to the flexing of the skin.
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