Leveling seam sealer w/ dispenser?

1968, how would a person get the stuff out of the tube?

Does it have a push piston? It looks like I still would need an apparatus to push / dispense the product..

Maybe I was not clear enough. I prefer not to buy a 50 - 150 (actually the basic dispenser for this product is 200+) dollar manufacturer specific "caulk gun" on top of the price of the product. I am guessing that for even distribution and "flow" I am going to have to get a "system" including the "caulk gun".

If that is the case, what is the most economical way to get this seam sealer application accomplished?

Thank you.