I use a syringe because that is how I learned to do the Bibler and Black Diamond tents with.
I tried other ways but just prefer to use a syringe.
This is one of my seams :
Takes me 40 to 60 minutes to do a shelter that way, but of course it also needs to remain set up for 10 to 24 hours depending on temperature and humidity levels.
The $5 kit Henry was talking about is this :
Just to elaborate a bit about seam sealing silnylon , some manufacturers choose to add PU to the underside so that they can machine tape theirs, however that weakens considerably the tear strength of the fabric.
Others , like most of the "cottage" industry but also brands like Terra Nova and Macpac choose to keep the original tear strenghth and get you to seam seal it .
BTW, Henry's way (paint on , let it sink and wipe) is even less visible than mine...)
My old lawn could handle 4 tents, the new one only 3 :
(Australia is only about 5% of the TT market)