Blok-Lok with Graffiti Control is a water-based hybrid graffiti coating & water repellent sealer. It combines high quality penetrating chemical solids with an acrylic surface treatment component. This creates durable graffiti protection with long lasting water repellency . Blok-Lok with Graffiti Control is eligible for a material warranty of up to 5 years graffiti protection and up to 10 years water repellency.