Super Coverite question - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-08-2016, 12:11 PM   #11
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Re: Super Coverite question

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Originally Posted by Mike Sebastien View Post
Don't understand the for using varna thane. To me it would just add unnecessary weight.

I asked a question in the 'Construction' section a while back and got some great answers from the guys here on RCC and tried it, to my delight it worked.

Perhaps because it fills in any minor imperfections, seals in the sawdust, provides a good level of adhesion without and harmful vapours and it can be purchased at any CTC.

Have a look at the comments from 'MAX' and 'Thunder Chicken' on page two.
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Old 05-08-2016, 12:13 PM   #12
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Re: Super Coverite question

I agree with Mike .... if the covering has adhesive coating on one side, putting any kind of finish on the balsa should not be needed; just a few strokes of sandpaper to remove any oxidation and vacuuming to remove dust which would interfere with adhesion.

I looked up the preparation of wood surfaces on an old package of a fabric Coverite I have; apart from filling in cracks and sanding, there is this:
"Coverite has a new space-age adhesive that adheres without any wood prep. However, we recommend one coat of our BALSARITE which will seal the wood, inhibit the return of moisture and reduce bubbling and wrinkling later on."
I don't know about the "bubbling and wrinkling" but the sealing of the wood and inhibiting the return of moisture is, in my opinion as an amateur woodworker, is nonsense.
"OUR Balarite" = please buy something else from us.

For an adhesive to fabric not having an adhesive coating, lots of things can be used: dope, Modge Podge (available at craft stores like Michael's), ordinary thinned white/yellow wood glue (applied in multiple very light "spit" coats on wide, thin surfaces such as LE sheeting, to prevent expansion of the wood until the wood surface 'sealed' to prevent the water in the glue from deforming the wood), etc.

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Old 05-08-2016, 01:58 PM   #13
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Re: Super Coverite question

Hey guys;

The fun thing here is that LOTS of things work.
Some methods take longer, some have more dust or odor. The type and size of plane that you are working on also has a bearing on the method you use.
Here on the RCC we exchange ideas – it’s up to you to decide which one you would like to try/use.

It’s just a matter of what ‘Works for YOU’.

Happy Landings!
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Old 05-09-2016, 01:19 PM   #14
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Re: Super Coverite question

Thanks for the idea of using the water based varathane...I think that may be the route I'll go.
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Old 05-09-2016, 01:31 PM   #15
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Re: Super Coverite question

Only thing that concerns me with water based anything, is the water bit. Thin sheeting doesn't like getting soaked with wet stuff. While I've successfully used water based varnish for glassing, I dope-sealed the sheeting first, which kind of defeats the purpose. You're just adding weight, and risking damage to the wood. Mike Sebastien is absolutely right. If it's super clean, you don't need anything.
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Old 05-09-2016, 08:03 PM   #16
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Re: Super Coverite question

One issue is that if you aren't going to seal the wood (I have used water based polyurethane) the adhesive tends to gas off when the model sits for a time in the hot sunlight, causing those telltale bubbles.

While I haven't weighted a plane before or after the urethane treatment, the added adhesiveness and the ability not to bubble is worth any added weight gain in my fleet. When applying urethane you will se little grain tails pop up, a quick sanding with 400 grit sandpaper will leave you with that "Babys bottom smooth " feel. (Sounds like a weird thing to say on a RC plane forum).

I have had a specific make of ARF, and this manufacturer could use a lesson from this thread. No matter what the color is (light vs dark) the damn things have adhesion and gassing off issues......
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Old 05-09-2016, 09:31 PM   #17
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Re: Super Coverite question

Here is a good example where I used super coverite. Just sanded the structure with 220 grit sandpaper, made sure it was dust free and applied the covering. Nothing else was applied to the surface and wasn't required. Proof is in the picture
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Old 05-09-2016, 09:36 PM   #18
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Re: Super Coverite question

I actually used the varathane method to seal a set of old wooden rotor blades before covering them with Monokote. It worked very well.
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