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Old 05-06-2019, 11:11 PM
Stu Mclean Stu Mclean is offline
Join Date: Apr 2016
Location: Murray Downs Nsw
Posts: 10
Default Proseal

Hi all
I am working on the muffler cover area and it calls for proseal to seal edges etc in several differant places
What is the life of proseal once mixed in the cartridge ?
I dont think I have time to do all parts listed in one siting and was hoping not to have to use several tubes of proseal when the area required only looks like 1 tube would do the job
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Old 05-07-2019, 02:13 AM
salto salto is offline
Join Date: Apr 2015
Location: Wee Waa Australia
Posts: 279

I used Dow Corning 736 for that area.
Kit 140241
Tail Feathers done
Fuselage kit completed.
wings almost complete.
Flaps and ailerons done.
Canopy next. Phew!
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Old 05-07-2019, 07:28 AM
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Raymo Raymo is offline
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
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Depends on the proseal but generally you'll get 30-60 minutes, at most. You can mix freeze it to extend the useful life.
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Old 05-07-2019, 07:45 AM
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Walt Walt is offline
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Location: Dallas/Ft Worth, TX
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Do yourself a favor and buy a quart then you mix as much as you need when you need it.
Walt Aronow, DFW, TX (52F)

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Old 05-07-2019, 10:35 AM
JHartline JHartline is offline
Join Date: Dec 2012
Location: Carrollton, GA 5GA2
Posts: 232

Amen to Waltís reply. I tried to do the cartridges and ended up spending (and wasting) more than necessary. Got a digital Harbor Freight scale and mixed my own. Itís nice to be able to mix up a tablespoon of sealant whenever you need it. Others may disagree but I would forego the cartridges except maybe for the fuel tanks.
James Hartline
Carrollton, GA 5GA2
RV-14 - First flight 4/7/2019. Phase I complete as of 9/11/2019!!
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Old 05-07-2019, 10:49 AM
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wirejock wirejock is offline
Join Date: Oct 2005
Location: Estes Park, CO
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Default Flamemaster

Vans sells a 3.5 oz quantity. About 1/2 the price as a quart.
Larry Larson
Estes Park, CO
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Old 05-07-2019, 11:04 AM
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fl-mike fl-mike is online now
Join Date: Jul 2005
Posts: 1,225

I use a hybrid approach.
I use the cartridges for application, but mix from the quart can.
For me, it makes applying the proseal much neater and controlled.
I kept the tubes from when I built the tanks, but you can buy empty tubes also.

The cartridges and nozzles can be easily reused. Just squeeze out the excess once you are done with the job. Allow the remaining proseal to cure in the cartridge tube and nozzle. After it cures, unscrew the nozzle and pop off the "spear". Put the nozzle back on and use an airgun on the nozzle tip to pop the remaining "button" of proseal and the ram out of the tube. Makes a nice "pop"! Any residue in the tube can be rolled out with your finger or a rag. The key is to not leave a big slug in the tube, because you won't be able to pop it out.

And, you can extend the working time by putting it in the freezer, but for small jobs, just mix what you need out of the can.
Mike W
Venice, FL
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Old 05-07-2019, 12:44 PM
rv7charlie rv7charlie is offline
Join Date: May 2006
Location: Pocahontas MS
Posts: 3,875

I've mentioned this before; my favorite proseal dispenser is from the aviation dept at the local grocery store: cheap qt size zip locking plastic bags. Turn one inside out & place on the scale. Weigh the two parts, reach in the bag and turn it right side out. Mix on a table with a short piece of pvc pipe or wood dowel used as a rolling pin. Push the mix to one bottom corner, snip ~1/8" off the corner, & 'decorate' your part like a baker. Throw bag away.

Takes longer to tell it than to do it.

(And I'd never try to convince anyone that unmixed proseal kept in a freezer for 15 years still works...)

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Old 05-07-2019, 03:24 PM
Stu Mclean Stu Mclean is offline
Join Date: Apr 2016
Location: Murray Downs Nsw
Posts: 10

Thanks for the responses
Yes starting to realise that a quart of the stuff would be a better option than the couple of tubes that I have
Will just have to see how far I get I suppose and get more if required just a pain in Australia to get where I am
Do you need much more for the rest of the build have done fuel tank a etc just working of fuselage now ?
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Old 05-07-2019, 04:11 PM
rv7charlie rv7charlie is offline
Join Date: May 2006
Location: Pocahontas MS
Posts: 3,875

If you're not doing fuel related sealing, have you checked with Van's to see if another sealant is acceptable? High temp RTV, urethanes, etc etc.
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