I may have missed this, my apologies for bringing up a tired subject if I am. What are some of the best products to fill in the gaps when building a model. I’ve heard fo superglue, but looking for other products.
…putty…
Then I am using the right product. Thanks for answering the silly question.
cat-putty that is…
no seriously…lets not shock the newcomer,
I actually have started to use a combination…first I fill the gap with stretched sprue filler…in other words…the stretched sprue strand…it fills great all sizes since when stretched it will naturally be thicker on the ends and thinner in the center…
lay down some liquid cement in the gap…fill the gap with the right thickness sprue to fill then add more glue on top…if the strand is really thin it practically melts into the gap then just sand down…if it sits higher than the gap still no problem…either shave it down with a chisel blade or sand…if there is still work to be done then finish it up with the putty…the sprue also gives some backing strength to the putty. This has been especially helpful in tight spots where its hard to sand or you have detail you dont want to loose…
Good luck…
MEOUW
Thanks, for the information.
I use automotive glazing putty (used to be called spot putty). It is very much like green stuff. Because do it yourself auto body repair is not as popular as it used to be, it is usually available only in larger sizes- I had to buy a one pound tube last time. More expensive than putty from hobby shop, but those HS tubes don’t have much in them. There is a LOT in a one pound tube, so it will last forever, as long as you remember to put the cap back on 
I still find it amazing that a massive lizard is capable of such fine work!
I’ve tried this with the stretched sprue & it works great in tight spots (thinking small gaps between wings & fuselage), I’d rather deal with that than putty in those cases.
Tamiya also makes a liquid putty you can brush on for smalls seams and gaps…very nice results…
I’ve used automotive glazing putty for years and love it. As Don mentioned, it can only be purchased in 1 lb sizes and they tend to last me as long as 5 years. The particular brand I prefer is Dupont’s “SPOT 'n GLAZE” Laquer Putty, 2288S red oxide. It goes on very nice straight from the tube and can be thinned with Laquer thinner to a liquid which brushes on very nicely. Usually takes 15 to 20 minutes of drying before sanding.
If the thought of the smell of laquer based putty bothers you, 3M produces at least two different types of acrylic based spot putty, Acryl-Green or Acryl-Blue. The only differences between the two that I can detect is the blue takes about 10 minutes to dry and the green takes about 1 minute to dry! Plus I haven’t figured out how to thin the putty to a liquid state.