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  #1  
Old 02-02-2014, 04:12 PM
Stockmanreef Stockmanreef is offline
 
Join Date: Nov 2012
Location: Midland, mi
Posts: 963
Default Proseal Curing Question

I live in Michigan, its cold, and I want to build my tanks. Well, I mixed up a small batch of proseal. It was really hard to mix and to weigh out. The material was not flowable at all. It is about 40 F in my garage and only turn up the heat when I am working.

1. I think that I figured out that I have to keep the unmixed proseal in the house where it is warm. Good idea? How warm should the material be in order to get it easier to work with? I have seen posts where they heat it up to 80F prior to mixing.

2. Should I bring in the parts to have them at room temp prior to applying the sealant?

3. Should I bring the parts inside to get them to cure?

4. should I just move on to the ailerons and flaps, then wait until warmer weather to build the tanks?

Thanks
ken
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  #2  
Old 02-02-2014, 04:47 PM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
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I think the proseal and parts should be at room temp (70 or more) before you apply it. That way, it'll flow better into any gaps, and will squeeze out better when you rivet the assembly. You'll also have an easier time applying a good filet in areas which get that treatment.

At low temperatures, you will see extended curing time. Days, maybe weeks. It won't hurt a thing, but every time you walk past and put a thumbnail into the proseal, you'll wonder "Is this stuff gonna cure?".

The answer is yes.
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  #3  
Old 02-02-2014, 04:54 PM
tomhanaway tomhanaway is offline
 
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I did my tanks about 1 month ago. Temps when garage unheated were in the 40's.
I just brought the tanks inside and left in a guest bathroom for curing.
Tom
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  #4  
Old 02-02-2014, 05:15 PM
Stockmanreef Stockmanreef is offline
 
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Is it worth purchasing a Semco gun for applying the sealant? Or should I just stick with the syringe method.
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  #5  
Old 02-02-2014, 05:26 PM
Kyle Boatright Kyle Boatright is offline
 
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Location: Atlanta, GA
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Quote:
Originally Posted by Stockmanreef View Post
Is it worth purchasing a Semco gun for applying the sealant? Or should I just stick with the syringe method.
I spread the stuff with popsicle sticks. Worked well.

If you were gonna build 5 airplanes or something, a semco gun might make sense. A better application method just isn't gonna save you much time or improve the quality of your work.
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  #6  
Old 02-02-2014, 05:34 PM
Stockmanreef Stockmanreef is offline
 
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I was sort of thinking the same thing. I just caulks a shower with a caulk gun and regardless of the number of times I caulk something, I always end up with a mess. I assume that this will be the same with sealing tanks. Unlike a shower, the tanks don't need to be pretty, just sealed.

thanks
ken
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  #7  
Old 02-02-2014, 05:47 PM
tomhanaway tomhanaway is offline
 
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i bought a Semco gun on ebay for around $50 bucks. Bought disposable 2 oz. cartridges and nozzles from Aircraft Tool Supply.

It made the job so much easier than on my first build.
Highly recommended.
Tom
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  #8  
Old 02-02-2014, 05:50 PM
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rocketbob rocketbob is offline
 
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You can nuke the resin (not the hardener) for a few seconds in the microwave to get it warm, before mixing. Works great.
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  #9  
Old 02-02-2014, 05:58 PM
Stockmanreef Stockmanreef is offline
 
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Is the Semco gun that much easier than syringes?
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  #10  
Old 02-02-2014, 06:31 PM
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wirejock wirejock is offline
 
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Location: Estes Park, CO
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Default cold proseal

Ken
I am also working tank parts. I keep the proseal in the house the night before (68 degrees).
The parts change temp so fast there isn't much reason to keep them inside but I do bring the garage up to 55-60 before working with it. After working, I brought the parts back in along with a sample. Two days inside the sample was pretty stiff. I wouldn't call it fully cured but it seems safe to handle.
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