The Extreme series of SureCrete are used as castable GFRC concrete for making countertops, panels and other small and large concrete (design) products. The GFRC concrete XS PreCast is a white castable gfrc cement with additives that come fast to a the extreme strength. The patented GFRC concrete mix is formulated in such a way that the concrete mix is immediately ready for use with all necessary additives such as fiberglass and various resins.