The Zinsser Bulls Eye 1-2-3 is a white all-surface stain blocker available in sizes of 500ml, 1L, 2.5L, and 5L. With the trusted Zinsser brand name, this product effectively blocks stains from all surfaces, making it ideal for use in DIY projects involving paint, stains, and varnishes. Its formula ensures a durable and long-lasting finish, allowing for a smooth and uniform application on any surface. Perfect for creating a clean and professional-looking result in your home or DIY projects.