What do you mean by "swirl"? I have tried twisting but it always seems to
just make the leak channel a twisted path but not fused together. Also,
twisting and pulling leads to a very tiny, brittle end to the seal. I was
able to make it "ball up" a little but never become robust enough that I
was comfortable it wouldn't break easily.

On Wed, Nov 1, 2017 at 12:43 PM, Van Horn, David <
david.vanhorn@backcountryaccess.com> wrote:

>
> Here's the secret:  Once you get it soft, twist and swirl.  This breaks u=
p
> the leak channel into tiny bubbles.
> After flame cutting, pull off any excess with stainless steel tweezers an=
d
> then torch it smooth.
>
> I've got that technique down cold, and have done hundreds of such seals
> without problems, even when running at 50 microns inside.
> Cooler torches help slow things down, a regular propane torch will work.
>
>
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