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8A Fuel Tank Sealant Question
Thanks for all the replies and help! I now have a couple of new wrinkles in my one brain cell.
One-y |
Proseal
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I manage a small Google Group of Colorado RV Builders and Owners. If you would like to join, shoot me an e-mail from a G-mail account. On the proseal side, I kept some fairly good notes. Refer to my blog. |
For a cheap ?caulking gun?, I used horse syringes from Tractor Supply. I used the largest ones they had and it worked great for neatly applying proseal, even for putting a dab over the shop head of the driven rivet. You can keep filling and reusing the same syringe until the proseal begins to set up. Just pull the plunger out, refill the tube using a wide popsicle stick and keep going. It?s a cheap and easy solution.
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Another method is quart ziplock style freezer bags. Turn one inside out, weigh the two components (about a golf ball size portion) on the bag itself, turn it right side out & squeeze out the air, seal, and mix with a dowel or short piece of pvc pipe as a roller on the table. Roll the mix to one corner, snip the corner with a razor knife or scissors, and use it like a cake baster. You never need to worry about overcured mix combining with new mix, and supply of dispensers is as close as the nearest convenience store.
Charlie |
Number of 3.5oz cartridges?
Due to life, I have an unopened quart that?s about to time out. I?m also having nightmares about the measuring mess.
I?m going to the 3.5 oz cartridges from here. After reading all of the posts, I?ve seen 1g/ linear inch, and that one tube does a back baffle job (6/7/8/9). What does it take to do a whole tank (8). It,s been asked a couple times but never directly answered from experience. I admit it, I?m feeling lazy. Thanks. |
I think I used three or four. You?ll need at least two for the ribs then another to do the back baffle. Keep the quart. You can mix up small batches and reuse the tubes. You?ll need some small jobs here and there anyway. When you?re done with the tubes, squeeze out as much of the remaining material as you can. Let cure for a few days and then take off the nozzle, pop out the ?stinger?, put the nozzle back on and pop out the cured bit with compressed air backwards into the nozzle.
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Proseal
I used about 1-1/2 quarts on my 7a tanks. I think the tanks are the same if not really similar in size.
I have a very old quart and use it for small odd jobs. Still sets up just fine. Keep a sample of every mix as a control. Date it and check before sticking a finger in the tank material. |
Don?t throw away the older proseal quarts. Keep it in a freezer and use it for the dozen little sealing jobs on the firewall and finish kits close outs. It may not be gas worthy but it?s definitely good for that for a long time.
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As with Larry, I used about 1.5Q on my 7A tanks too. I actually used slightly more, but still under 2Q and if I were more diligent with my use, could have wasted less.
I was mixing up 15g per rib first and then was able to get it down to 10g. I don't remember how much for the baffle. 60 or 70? |
After some instruction from a skilled 2 time builder, I used a single qt kit to seal both standard -7 tanks, plus two 3-bay leading edge aux tanks (around 13 gallons each).
FWIW, there is *very* little sealant needed for the interior ribs. A tiny 'donut' around each rivet on the faying surface, a match head size dot in the dimple, and a small 'cap' over the shop head is all that's needed to seal an interior rib. Charlie |
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