It's fine to use for the application that you describe above.

I'd love to get ahold of some of the same stuff .
We had our roads recently regrinded and resurfaced and the barrier cloth thickness that the road installation crew used was about 50 % denser than the professional quality double bonded barrier cloth that we can buy .. plus the Cal Trans barrier cloth came in rolls that were about 20 feet wide !

I'm envious of your find . Would love to have a 20 foot wide roll of this barrier cloth when we do our barrier layer for patios .

So buy some. I used the large rolls of this geotextile
under a crushed asphalt road about 8 years ago and it's holding up great. Purchased it from a cement company.
Sorry I can't remember the price, but do recall that I didn't find it outrageously expensive.

Michelle,
I assume that you know that 12 foot wide rolls of the Geotextile filter fabric material can be purchased locally? American Soil Co. has it in their Richmond location.

Thanks for the tip David,
Yes, I know of a variety of sources for the geotextile fabric but have not come across any that sell it in 20 foot widths.

By the way, I noticed that you are one of the grand poooba speakers next year at the Stybing Arboretum when they host the Horticulture Magazine Symposium.
Nice line up of very talented international people too , got yur'self in with some high faluten' company !

I'm thinking of signing up for the symposium to hear what all you hot shot designers are up to. : ~ )

Happy Holidays !