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  #11  
Old 09-15-2021, 06:58 AM
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riseric riseric is offline
 
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Quote:
Originally Posted by Captain Avgas View Post
There are literally dozens of different alcohols (and blends thereof)....and nearly all of them will exacerbate cracking in a perfectly good acrylic canopy in short time. You can use isopropyl alcohol if it is guaranteed 100% pure....or you can use kerosene. Not much else is really safe. The problem is that the products that are truly safe to use on acrylic don't tend to be very effective at removing adhesive residue. So I wouldn't go there.
Scotches, Gins, Vodkas, Tequilas,... yes, there's a lot of different alcohol choices around...
I was obviously talking about rubbing/isopropyl alcohol.
Best then, the 99.9% version.
I did not know that kerosene is ok???...!!!
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  #12  
Old 09-15-2021, 07:10 AM
Captain Avgas Captain Avgas is offline
 
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Quote:
Originally Posted by Ralph Inkster View Post
3M 1080 I removed from canopy left no residue
The 3M vinyl is a good product (and priced accordingly). However whether it leaves a residue will depend on a number of factors including how long it is left on for, how much heat and sun exposure it gets, and what the colour is.
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  #13  
Old 09-15-2021, 07:25 AM
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Karetaker Karetaker is offline
 
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To better explain:

I have a tip up canopy under construction, just about complete. I did not paint the roll bar. I am adding a "targa" strip to the canopy so when the canopy is closed, the targa will over lap the un-painted roll bar and the seam between the canopy and rear window. I wanted to add a 1" strip of black vinyl directly to the rear window, hiding some of the roll bar, right where the targa lays over it.

Obviously the integrity of the canopy is most important and adding this vinyl is not a requirement.
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  #14  
Old 09-15-2021, 07:37 AM
BenNabors BenNabors is offline
 
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Location: Alabama
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Default Static cling wind tint.

I have used static cling window tint on the inside without any issues. I used the 95% block overhead to cut down on the UV and sun intensity to keep the cabin cooler. It is about twenty dollars.

If you are covering a large area, I found it is best to install in strips as flexing in a compound curve creates a wrinkle challenge.

In your application, a one inch strip should be very easy and it would obscure the view.
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  #15  
Old 09-15-2021, 08:20 AM
Captain Avgas Captain Avgas is offline
 
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Quote:
Originally Posted by riseric View Post
Scotches, Gins, Vodkas, Tequilas,... yes, there's a lot of different alcohol choices around...
I was obviously talking about rubbing/isopropyl alcohol.
Best then, the 99.9% version.
I did not know that kerosene is ok???...!!!
Eric, virtually all alcoholic drinks contain ethanol (ethyl alcohol) which in its pure form is a Class D reactant on acrylic and almost certain to precipitate microscopic cracking. A Budweiser is unlikely to do any damage because of its very low ethanol percentage which will be a relief for those RV builders who like to enjoy an occasional beer while they’re building. However a high proof Russian Vodka might very well screw your canopy.

But jokes aside my point is this....there’s denatured alcohol, amyl alcohol, benzyl alcohol, butyl alcohol, ethyl alcohol, hexyl alcohol, isobutyl alcohol, methyl alcohol, and nonyl alcohol (to name just a few) and all of them are guaranteed to damage acrylic.

So when we advise other builders to use “alcohol” on their canopies it is of crucial importance that we stipulate specifically that we are only referring to isopropyl alcohol and that virtually every other “alcohol” will be a disaster.

You also referred to using “rubbing alcohol” but that’s a dangerous trap too. Rubbing alcohol often contains isopropyl alcohol which is safe but sometimes it contains ethyl alcohol which is very dangerous. The problem is there’s no international standard for rubbing alcohol.

For decades RV builders have been getting cracks in their canopies because they have been inadvertently putting hostile solvents on them. And the amazing thing about this is that new builders keep doing it.
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  #16  
Old 09-15-2021, 08:50 AM
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For those who may not be aware, this link is to the Vans Website and their acrylic/Lexan hints.

https://www.vansaircraft.com/faq/acr...-window-hints/

I was going to use simple black electrical tape, until I re-read the above paper.

So, this is why I was asking if anyone had any experience using vinyl wrap on the canopy. (rear window)

Or is there some other black covering I can use on the rear window, under the targa; again, about 1" wide? (vinyl, tape, paint, etc.)
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  #17  
Old 09-15-2021, 10:34 AM
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flyboy1963 flyboy1963 is offline
 
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Default vinyl on acrylic

Funny how the question of what to do with canopies just rolls on, year after year.
Smart to ask, of course!

about 95% of the illuminated signs that you see are adhesive vinyl on acrylic or lexan faces.
There.
Only about a zillion square feet of this, used for the last 30+ years or so.
I did exactly the same thing on my canopy, laid a strip of beige vinyl over the rivet line on the canopy bow...partly to seal the rivets, which allowed moisture in.... and could rust the bow!

Removal can be a hassle if baked in the sun. If you are hangared, I really don't think you'll have major issues.
Find the vinyl manufacturers specs, but the general guide is 'hot sunny day' or carefully warm to the equivalent, and most vinyl will peel off pretty readily. It often leaves some or all of the adhesive behind, so use the MILDEST solvent possible ( I like mineral spirits...paint thinner ....NOT lacquer or anything 'hot') to soften, and gently scrape off the adhesive...then do a final wipe with something like mineral spirits or dilute iso alcohol, NOT 90%, it's just too agressive.
Van's tips are bang on here.
I'd avoid adding large areas of black.... or even heavy tint, as it has to absorb, rather than transmit the light energy, and can heat and expand in ways that are not desirable.
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  #18  
Old 09-15-2021, 11:48 AM
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Just don't do this:

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  #19  
Old 09-15-2021, 03:53 PM
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SeanB SeanB is offline
 
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What about applying the Sika Primer to the inside of the canopy (if I understand your need correctly)? Makes a nice Targa look. Obscures view of the roll bar.
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Last edited by SeanB : 09-15-2021 at 04:21 PM.
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  #20  
Old 09-15-2021, 06:19 PM
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wcalvert wcalvert is offline
 
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Mine is SIka primer as well, looks like it's part of the canopy ...
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