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12-21-2015, 09:38 PM
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Join Date: Jun 2007
Location: new iberia la
Posts: 768
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Scales
$10 Digital scale from harbor frt works great to mix sealant and activator by wt. It will come in handy for mixing fiberglass resin later. I keep a thin ziplock on mine to keep it clean.
Don Broussard
Rv9 Rebuild in Progress.
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12-22-2015, 08:47 AM
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Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 1,055
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+1 on the scale.
For mixing I bought the $1 plastic cutting board sheets at the dollar store (two for a dollar). I also have one of the 3" pink plastic bondo mixing paddles from the auto store. Zero the scale with the sheet on it (half sheet for me actually). Then the sealant, then dab the catalyst on top till it weighs right. Mix like bondo with the paddle - good to go. Sticks break too easy for me.
After the board dries the proseal peels off easy. Same for the hand paddle. Reused many times. I think three hand paddles come in the bondo paddle package.
__________________
Ser 104142, RV-14A flying - N1463 
Ser 83825, RV-8 building - N8638? 
USN Ret, Urologist, AME, Repeat Offender
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12-22-2015, 02:13 PM
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Join Date: May 2010
Location: Spring Hill Fl
Posts: 734
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plastic cutting board sheets
I like this idea
This is how I will do mine
Thanks
Joe Dallas
Quote:
Originally Posted by JDA_BTR
+1 on the scale.
For mixing I bought the $1 plastic cutting board sheets at the dollar store (two for a dollar). I also have one of the 3" pink plastic bondo mixing paddles from the auto store. Zero the scale with the sheet on it (half sheet for me actually). Then the sealant, then dab the catalyst on top till it weighs right. Mix like bondo with the paddle - good to go. Sticks break too easy for me.
After the board dries the proseal peels off easy. Same for the hand paddle. Reused many times. I think three hand paddles come in the bondo paddle package.
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12-22-2015, 02:55 PM
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Join Date: May 2006
Location: Sammamish, WA
Posts: 654
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Mix to color...
I measured by weight for the first few. I noted roughly the size of the sealant and catalyst and from then on mixed based on visual size, and verified by matching the color.
Been flying 1.5 years no leaks. Actually I did have a leak on the fuel level mounting plate but it didn't have anything to do with the sealant.
Michael-
__________________
Michael Burbidge
Sammamish, WA
RV-14A Empennage
RV-9A Flying?340 hours!
Last Donation: December 2019
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01-03-2016, 06:47 AM
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Join Date: May 2010
Location: Spring Hill Fl
Posts: 734
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Cleaning Aluminum for Flamemaster tank sealant
I received my scale and I will start my fuel tanks soon
http://www.affordablescales.com/shop...Q#.VokcWuRIiF6
I have some questions on cleaning the parts
Vans instructions
Then thoroughly clean all the parts (including rivets) with naphtha or MEK
or an etching acid like Alum Prep or Twin Etch. After cleaning, do not pollute the areas to be sealed. Don’t even touch them. The oils from your skin will affect the bond of the sealant.
1. Will Acetone do a good job or should I buy Alumiprep no. 33 from
Aircraft spruce.
2. How do you clean the rivets, do you just wipe them with Alumiprep or do
you need to scuff them first with scotch-bright pad and then clean.
3. Do you need to rinse the after etching.
4. What works best
This is new territory for me, any help will be appreciated
Joe Dallas
Last edited by joedallas : 01-03-2016 at 06:54 AM.
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01-03-2016, 08:00 AM
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Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,247
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As suggested, naptha or MEK works fine. Acetone is probably OK as well. I have a partial gallon of reducer left over from an auto painting project years ago; that works great. You just want something that will remove all contaminants from the surface. Naptha (mineral spirits) works well because it doesn't evaporate as quickly, so you have time to wipe it down with a dry rag before it evaporates. I scuff the sheet metal with a Scotchbrite pad before cleaning, but not the rivets. Those just get dunked in solvent and air dried.
If you get really ambitious and use an etching solution (I wouldn't, but to each his own I guess) you'll definitely need to rinse the parts afterward.
This is not a really challenging or unique thing. Like any other time you use an adhesive or paint, you want the metal to be very clean, and the mating surfaces should be scuffed.
__________________
Dale
Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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01-03-2016, 08:17 AM
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Join Date: Apr 2008
Location: Davenport, IA
Posts: 1,390
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Mineral spirits is not the same or similar to naptha. I would not use mineral spirits as it does not flash well and leaves a residue. Naptha (Coleman fuel). Mineral spirits (Charcoal lighter).
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01-03-2016, 08:28 AM
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Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,247
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I stand corrected... I do use mineral spirits for cleaning, but follow it with a wipe down with acetone, MEK or more often paint reducer to remove any film.
__________________
Dale
Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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01-06-2016, 04:09 PM
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Join Date: May 2010
Location: Spring Hill Fl
Posts: 734
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a couple of follow up questions
I bought a gallon of MEK for cleaning the aluminum.
I did a test try of mixing and sealing a test joint
This will not be my most favorite thing to do
a couple of follow up questions
If I paint the tank will it harm the tank sealant
Will the tank sealant bond to tank sealant to add a little in the corners.
Thanks
Joe Dallas
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01-06-2016, 06:04 PM
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Join Date: Jun 2012
Location: Hillsboro, OR
Posts: 63
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Quote:
Originally Posted by joedallas
If I paint the tank will it harm the tank sealant
Will the tank sealant bond to tank sealant to add a little in the corners.
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That's one of the great things about tank sealant. It's paintable.
Yes, tank sealant will bond to tank sealant.
__________________
RV addict for life.
NOTE: The information, ideas, and opinions presented in this post are my own and not those of my employer. Build, test, and fly at your own risk.
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