Additive F is for use with Resin Research epoxy resins. It was designed to help prevent air bubbles, eliminate blush, fish-eyes, and improve ease of sanding. The 4 oz. size is sufficient for an entire 3-gallon kit.
1cc per Ounce of Hardener (Lam)
2cc per Ounce of Hardener (Top Coat)
Note: Additive F is not required. Many manufacturers think it's not worth the extra step of measuring and mixing. Additive F is not typically used in ding repair applications.
* Gallon size pictured.