Hi, The sinew itself will gain strength as it dries. Depending on the thickness of the sinew layer and the humidity in your area, it may take a couple of weeks or more. Tite bond cures much faster than the sinew dries and prevents the sinew from shrinking or adding reflex. Hide glue is a better match for sinew in that way, though the hide glue / sinew combination may continue to cure, shrink and add reflex for weeks or even months.
Sorry, long answer, I suggest waiting a week or two. Ron