CalStar Products. Two green masonry products, fly ash brick (FAB) and fly ash pavers (FAP), incorporate fly ash, a postindustrial recycled waste material, in a durable product that’s energy efficient to make. Available in a range of earth tones, the products embody one-tenth of the energy of a fired clay brick, the maker says, because fly ash is self-cementing and doesn’t require firing. They may also help projects earn LEED points. 510.793.9500.