[I use #3, #4, and/or #16 as needed.
#3 is fast drying, as in under a minute.
#4 gives you a few minutes, but less than 5.
#16 is a good filler, but I strongly suggest going to a hobby shop to buy plastic noozle tips. The noozle allows less of the product to come out at a time, and gives the user greater control.
I'm not familiar with the product or company you mentioned. I get all my stuff at Regal Plastics, which is on the east side of Fort Worth.]