Need help, silicone or something under my Tacoma

Just bought my 2016 Tacoma and notice this in certain areas. Does anyone know if factory it comes like this ? Or are these areas prone to leaking and rust? Any help would be appreciated

 

I haven’t been under a 3rd Gen.
But my 2nd Gen has something similar in places.
I believe it’s a seam sealer. It help keeps water out of the body panel seams.
I wouldn’t worry about. You’re better off having more than not enough.

Looks fine to me.

 

Yeah, I think it's seam sealer.

 

Looks like they were messy about it in 2016, but yes, it's factory applied sealant.

 

Normal. Seam sealer.