I have heard about using plastic bags with the end cut off but I'm going
to need to move alot of mixture in a short period.

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Dear Bart (and the Group),

If the 1-gallon Ziploc's aren't big enought (kinda hard to believe...) then
find a hardware store that caters to masons and buy yourself a couple of
'baker's bags.' Same idea as for decorating a cake but on an industrial scale;
used for accurately placing/dispensing mortor, filled epoxies, high-viscosity
urethanes, etc.

I believe you'll find the weak link in using caulk-gun tubes is filling the
things. With ziploc's and baker's bags you can do the mixing IN THE BAG, be
ready to place even fast-cure compounds as soon as the mix is uniform.

(Never used a baker's bag? Squeeze out all the air, hold it closed, give it an
easy spin... not too tight... then snip the corner according the size/shape of
bead you want to place. With a gallon-sized ziploc you can place about one
quart of mix; baker's bag can handle up to a full gallon. SOP for your
application, or applying 2-part sealant for riveted aluminum fuel tanks,
pontoon repairs, etc.)

-R.S.Hoover