IMHO, the 1 oz Proseal Kit is best..
Vans sells a little 1 ounce kit of proseal, which IMHO worked best for the empennage kit. I ordered 3 of them, then used one for the rudder and one for each elevator/trim tab combo (RV-10). You might be able to get by with less. If you keep them in the fridge and mix then "slightly cold" the work time is more than enough for the trailing edges. You can buy the "can" kit later when you get to your fuel tanks. If you go with QB wings, you might not even do your tanks...