I am so glad the gel worked out for you; it really is amazing! If you check around on this site you will find several threads where people list their recipes, some of which include ingredients intended as preservatives. There is one thread in particular where a woman tested various preservatives in the FSG to see which ones were the most effective. The preservatives ranged from things you can easily get at a health food store (essential oils, citric acid etc.) to commercial grade preservatives. HTH:-)
Hair Stats (CG since 3/31/12)
Type: 3c/b; Density: M; Texture: F-M; Porosity: L-N

Products
Cleanser: DevaCurl Decadence No Poo
Conditioner: DevaCurl Decadence One Condition
Deep Conditioner: various SheaMoisture Masks
Styler: Eco Styler Pink
Refreshers: DevaCurl Set It Free or Mr. Right
Shine: Jane Carter Seal and Shine
Oil: Grape Seed or Almond

Journeying back to gray!!!
Last Henna: 11/3/14