I'm not sure I fully understand your question, but if you are thinking this fabric could help hold soil from erosion while the grass seed germinates and gets established...I would not think it would work very well for this. You would have better the results you desire with straw or an actual seed/erosion mat.
I think it should work great for that. It is light weight but a very strong fabric that resists Sunlight breakdown. It is also easy to cut to put plants in.