Sealing the ends of tubes

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Well-Known Member
Aug 5, 2002
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Some people use CA to seal the ends of tubes. Works good, but I think I may be on to something.

I take some thin epoxy and paint it on the inside of the tube, to about 3" from the lip. I then coat the lip with some epoxy as well. Finally, a balloon is blown up inside the tube to compress all of the resin into the tube. This impregnates all of the layers of the tube, making them less likely to peel.

If you have a loose fitting nosecone, you can add a light layer of fiberglass in order to get a good finish.

The other nice thing is that this provides a very smooth surface for the nosecone to slide on.

Give it a try and tell me what you think!
Does the Balloon stick to the epoxy and you cut off what's not attached??


Thanks for that tip...I'm going to use that on my 8" Quiktube rocket.

Dan #2,

The balloon doesn't stick to the epoxy because it simply has nothing to grab on to. The balloon is smooth, and once you pop the balloon after the epoxy's cured, it all should come out, and then you just peel off what didn't.