Rust-Oleum 03959 Odorless Oil-Base Stain Blocker, White Zinsser Odorless Oil-Base Stain Blocker is a high-solids, low VOC specialty primer for interior use when the stain blocking performance of an oil is required, but odor is a concern. Developed specifically for âpeople-sensitiveâ areas in commercial and residential environments, the state-of-the-art sprayable formula has even less odor than most water-base primers. Rust-Oleum 03959 Odorless Oil-Base Stain Blocker, White Features: Seals stains from water, fire and smoke damage Oil-base performance when odor is a concern Non-yellowing, dries flat, sands easily Use with all topcoats VOC compliant sprayable formula Kills stains from water, graffiti, ink, and crayon Sticks to all surfaces without sanding Non-yellowing, dries flat, sands easily Odorless For interior use High hide oil base Dries in 2 hours 13 oz rosol