I make large batches (10 cups last time) and freeze it in smaller containers. Add potassium sorbate and citric acid. It takes me a long time to go through 4 oz (I only use anyone product once in five days, if that.) I've had okra gel, or FSG, out for LONG periods of time and never had a problem.
When I made my first batch of FSG, and didn't use preservative--it went "off" in just a few days.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; DM MiraCurls Curling Gelly; UFD Curly Magic; Shescentit LIs; Sevi conditioners; Botanical Spirits Puree, CJ Repair Me