Let’s start at the beginning: What is GFRC, what are its benefits and what are its downsides? GFRC stands for glass-fiber reinforced concrete. The GFRC I use is a composite of portland cement, silica sand, Forton VF-774 , Liquefaction Compound, Vitro Minerals VCAS-micronHS, water, and alkali-resistant chopped glass-fiber strands.