Think I have seen some SEAMS SPRAY for tents at WALMART. Check in their camping sections perhaps...
Probably wouldn't hurt to spray new tent seams with something like this.
I have have never done anything like that with mine - I would just go camping in it and see what leaks haha...
I remember when I first setup my POPUP trailer in the back yard getting used to how things work before going camping in it I had to get the broom after the cat a couple of times to keep him off the top of the popup tent material... He probably dug in pretty good with his claws...
Roy Ken