What is the estimated coverage rate on split face block as an anti-graffitiant? enegren February 23, 2024 FAQsFirst 60-100 Square Feet Per Gallon. Second coat 70-110 Square Feet Per Gallon.Post navigationPrevious Previous post: What is the estimated coverage rate on hard fired brick as an anti-graffitiant?Next Next post: What is the estimated coverage rate on smooth block (heavyweight) as an anti-graffitiant?