No, GFRC has proven to have good freeze thaw resistance, without the use of air entraining agents, due to the glass fibers, high density and low water absorption. In fact, it is likely that the air entraining agent would be counter-acted by the defoamer in Forton® VF-774.
This FAQ article is offered as a guideline and offers possible solutions to problems encountered during mold making and casting. No warranty is implied and it is up to the end user to determine suitability for any specific application. Always refer to the provided Technical Bulletins (TB) & Safety Data Sheets (SDS) before using any material. A small scale test is suggested to determine suitability of any recommendation before trying on a larger scale for any application.